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One Bangkok

One Bangkok is a landmark mixed-use urban development in central , , spanning 16.7 hectares at the intersection of Wireless Road, Sathorn Road, and Rama IV, near . Developed jointly by TCC Assets (Thailand) Co., Ltd. and Holdings (Thailand) Co., Ltd., the project represents one of 's largest private-sector investments, valued at approximately US$3.2 billion. It integrates five premium office towers, three ultra-luxury residential towers, three world-class hotels, three retail zones, public plazas, green spaces, and cultural venues, totaling 1.83 million square meters of gross floor area. Designed by architecture firm (SOM), the development emphasizes a "vertical village" concept with cascading green terraces, sky gardens, and shaded alleys tailored to 's . The development began opening in phases starting with office buildings in March 2024 and to the public on October 25, 2024, serving as a transit-oriented hub connected to Lumpini MRT station and accessible via a free shuttle from Ploenchit , fostering walkable urban connectivity. Its retail component features 190,000 square meters across zones like , The Storeys, and POST 1928, housing over 900 stores and more than 250 restaurants, including international debuts such as Wolfgang’s Steak House. Hospitality offerings include The Ritz-Carlton (opened December 2024), Andaz Bangkok (expected January 2026), and Fraser Suites (2026), alongside luxury residences and office spaces with occupancies reaching 80% in some towers by late 2024. Cultural elements, such as the Art Loop with installations by artists like and , and the One Bangkok Forum entertainment arena, enhance its role as a social and creative center. Sustainability is a core focus, with One Bangkok achieving for Neighborhood Development (-ND) certification—the first in —and targeting WELL , WiredScore, and SmartScore standards. The project incorporates energy-efficient systems, renewable energy sources like photovoltaics and solar hot water, rainwater , and 8 hectares of public spaces to reduce environmental impact and promote a smart, heart-centric metropolis. As of November 2025, it continues phased openings, positioning itself as a transformative district that redefines urban living in with an emphasis on livability, , and global appeal.

Overview

Location and Site Characteristics

One Bangkok is situated at the intersection of Wireless Road (also known as Witthayu Road) and Rama IV Road in the of central , . This prime positioning places the development in one of the city's most vibrant and accessible areas, spanning a total site area of approximately 17 hectares. The land was previously occupied by the Suan Lum Night Bazaar, a popular open-air market, and the original , iconic venues for commerce and cultural events that drew crowds for decades before their closure in the early . This repurposing marks a significant shift from informal public gathering spaces to a structured private mixed-use district, reflecting 's evolving urban landscape from ad-hoc commercial hubs to integrated, high-density developments. The site's characteristics are enhanced by its immediate proximity to key urban landmarks and green spaces. To the south lies , Bangkok's largest public park at 57 hectares, offering a natural buffer and recreational contrast to the high-rise environment. Along Wireless Road, the development borders the renowned embassy row, home to numerous diplomatic missions including those of the , , and , underscoring the area's prestige and security. Furthermore, One Bangkok benefits from close connectivity to the Sathorn and Silom business districts, just a short distance to the west, facilitating seamless integration into the city's financial core. This transformation of the site highlights a broader trend in central , converting former public and semi-public spaces into premium commercial precincts while preserving elements of historical and cultural significance. The project's location supports direct access to mass , including the nearby Lumpini station, enhancing its role as a connected urban node. Overall, these site attributes position One Bangkok as a catalyst for mixed-use vitality in Pathum Wan, blending residential, office, , and functions within a walkable, transit-oriented framework.

Project Scale and Cost

One Bangkok represents one of Thailand's largest private-sector integrated urban developments, encompassing a total gross of 1.83 million square meters dedicated to offices, , hotels, and residences. This expansive footprint spans approximately 17 hectares in central , integrating multiple high-rise structures to form a self-contained . The project features a series of towers with varying heights and floor counts, designed to create a dynamic . Building heights range from approximately 250 meters to 436 meters, with floor counts between 65 and 92 storeys; the tallest structure reaches 436 meters across 92 storeys. This includes five office towers, three residential towers, and five hotels within its mixed-use composition. Estimated at approximately as of , the development is funded through a joint venture between TCC Assets and , combining equity contributions with debt financing, including a THB 50 billion green loan from leading Thai financial institutions. Upon completion, One Bangkok is projected to accommodate around 50,000 workers and 3,000 residents, while attracting over 200,000 daily visitors, establishing it as a pivotal hub for Bangkok's . This scale underscores its role in redefining urban connectivity and economic activity in the region.

Development and Planning

Developers and Ownership

One Bangkok is a between TCC Assets (Thailand) Co., Ltd., which holds an 80.1% stake, and Holdings (Thailand) Co., Ltd., with the remaining 19.9%. The majority ownership by TCC Assets reflects the controlling interest of Thai billionaire and his family through their private . The project's ownership structure originated from TCC Group's acquisition of the 16.7-hectare leasehold site from the Crown Property Bureau in 2014, under a 30-year renewable for another 30 years. In 2017, the was formalized to develop the site into a mixed-use , transferring the to the while leveraging TCC Assets' local market knowledge for site management and partnerships. contributed its international expertise to aspects such as project design, tenant leasing, and operational strategies. TCC Assets, part of the TCC Group founded by in 1960, has a portfolio spanning , , and beverages, including developments like the complex and management of luxury hotels through subsidiaries such as Asset World Corporation. Frasers Property, a Singapore-headquartered multinational established in 1915, specializes in global mixed-use projects, with notable examples including the in , providing operational know-how in integrated urban developments.

Planning and Approvals

One Bangkok was announced on April 3, 2017, by TCC Assets () Co., Ltd., a of TCC Group, in partnership with () Co., Ltd., as a major private-sector initiative to create an integrated urban district amid Bangkok's growing demand for modern, mixed-use spaces following the political stabilization after the 2014 military coup. The coup had disrupted earlier development momentum, but the subsequent junta-led government prioritized economic recovery through large-scale infrastructure and urban projects, enabling initiatives like One Bangkok to address longstanding issues such as and insufficient green spaces in the city center. The site's location on land leased from the Crown Property Bureau, previously used for government-related purposes including a historic radio telegraph station, required rezoning from public to commercial use to facilitate the development. Key planning milestones included the development of the master plan in 2017 by (SOM), which envisioned One Bangkok as a "city within a city" spanning 16.7 hectares and integrating offices, residences, retail, and public amenities to serve up to 60,000 people daily while enhancing connectivity via the nearby Blue Line. Environmental impact assessments (EIA) were conducted as part of the pre-construction process, evaluating potential effects on traffic, air quality, and in the densely populated . The master plan submission and related documentation were prepared for regulatory review in early 2018, aligning with zoning adjustments to support high-density on the former . Regulatory approvals were secured from the (BMA) and national agencies, including the Office of Natural Resources and Environmental Policy and Planning (ONEP), with land use permits granted in 2018 to enable the project's progression. Construction officially began on June 28, 2018. These approvals confirmed compliance with Thailand's Enhancement and Conservation of National Environmental Quality Act, ensuring the project's alignment with standards for sustainable growth. The initial vision emphasized mitigating central Bangkok's deficits in green spaces—by adding 8 hectares of open areas—and alleviating traffic pressures through pedestrian-friendly designs and mass transit integration, positioning One Bangkok as a transformative response to the city's urban challenges.

Design and Architecture

Architectural Firms Involved

The development of One Bangkok involved a of internationally renowned architectural firms, led by (SOM) as the master planner and designer for the office towers, including the 437-meter signature tower. SOM, celebrated for pioneering sustainable high-rises such as the in , brought expertise in large-scale urban districts to integrate efficient vertical structures responsive to Bangkok's . Complementing SOM's oversight, A49 served as the local , focusing on the retail podiums and spaces to ensure seamless with the surrounding urban fabric. (KPF) contributed designs for additional office towers (Towers 4 and 5) and retail components like The Storeys and Post 1928, emphasizing pedestrian-friendly forms and community activation. Lead8 handled interior design and planning, particularly for key precincts such as , enhancing experiential retail environments within the mixed-use framework. The collaborative process, initiated around 2017, united these firms under a unified vision that blended modern international standards with Thai cultural motifs, such as curvilinear elements inspired by traditional gabled roofs and local craftsmanship in material selections. This interdisciplinary approach involved phases with local and global partners to harmonize the 17-hectare site's diverse functions. Firms were selected based on their proven track records in Asian mixed-use megaprojects, with SOM and KPF drawing from extensive portfolios in high-density developments across the region, ensuring the project's alignment with global best practices while respecting local context.

Key Design Elements

One Bangkok's design prominently features a of green terraces, latticed sky gardens, and expansive atria that weave vertical greenery throughout the development, creating a seamless integration of into the fabric. These elements span eight hectares of dedicated open , including public plazas and landscaped areas, which comprise nearly half of the 17-hectare site and promote while providing shaded, breathable environments for visitors. The terraces and sky gardens, inspired by Bangkok's surrounding parks like Lumphini and Benjakitti, ascend the towers in layered formations, fostering a "vertical village" that enhances air quality and offers panoramic views. The project incorporates Thai heritage through art-inspired facades and cultural motifs embedded in its public plazas, drawing from traditional regional to create a amid modern high-rises. Facades on select towers, such as Tower 4, evoke classical Thai motifs with subtle geometric patterns and sculptural elements that reference historical temples and local artistry, while plazas host contemporary sculptures and installations that blend ancient symbolism with urban aesthetics. This approach ensures the development resonates with Bangkok's , transforming public spaces into interactive galleries that celebrate Thailand's artistic legacy. A pedestrian-friendly layout defines the site's connectivity, with elevated walkways and interconnected podiums that span the 17-hectare expanse, minimizing ground-level traffic and encouraging seamless movement between districts. These elevated pathways, totaling over five kilometers of continuous routes, link key areas like Wireless Road, Sathorn Road, and Rama IV, while podiums create shaded, traffic-free zones that prioritize human-scale experiences and reduce urban congestion. The design philosophy emphasizes 15-minute , integrating tree-lined promenades and rest areas to make navigation intuitive and enjoyable. The development is organized into modular building clusters, such as One Bangkok One, Two, and subsequent phases including Towers 1 through 5 and the One Bangkok Forum, enabling phased construction while preserving a unified aesthetic across the site. This clustered approach, overseen by firms like , allows for incremental rollout—with initial phases opening in 2024—without compromising the overall visual harmony of layered greenery, consistent material palettes, and proportional massing that ties the ensemble together.

Components and Buildings

Office Towers

The office towers at One Bangkok form the commercial core of the development, comprising five premium Grade A+ structures designed to cater to multinational corporations in sectors such as , , and . These towers collectively provide over 500,000 square meters of net leasable , emphasizing flexibility through customizable floor plates and modular layouts that support diverse business needs. The towers vary in height from approximately 167 meters to 436 meters across 36 to 92 storeys, with the Signature Tower serving as the iconic centerpiece at 436 meters and 92 storeys, integrating office spaces with panoramic views of the city skyline. Other key office structures include Tower 1 (228 meters, 50 storeys), Tower 2 (241 meters, 49 storeys), Tower 3 (231 meters, 45 storeys), and Tower 4 (243 meters, 51 storeys), while Tower 5 stands at 167 meters over 36 storeys; Tower 5 features the largest typical floor plates at 3,500–3,700 square meters. Architectural features prioritize occupant efficiency and comfort, including column-free floor designs with ceiling heights of around 3 meters, knock-out panels for seamless multi-floor , and high-speed elevators among the development's total of units. Smart building technologies, such as facial recognition access, automated lighting, systems, and advanced air filtration to combat PM2.5, enable a high-performance environment tailored for global firms seeking adaptable workspaces. The office components are organized into clusters for phased development and operations, with the initial One Bangkok One cluster—encompassing Tower 1—opening in 2024 and attracting tenants like , a global , alongside others in and consumer goods. As of November 2025, recent tenancies include . This zoning approach allows for targeted leasing strategies, fostering a vibrant business hub integrated with the broader master plan while maintaining distinct commercial functionality.

Hotels and Residential Towers

The hotels and residential towers at One Bangkok form a key component of the development's hospitality and living offerings, blending luxury accommodations with high-end residences to cater to both transient visitors and long-term residents. The Ritz-Carlton Bangkok, occupying the lower 25 floors (floors 26-50) of a 52-storey tower at 216.4 meters, features 260 rooms and suites designed with contemporary elegance and Thai influences, including floor-to-ceiling windows offering panoramic views of . Amenities include a world-class , fitness center, outdoor , and multiple dining venues emphasizing personalized service for discerning guests. Opened in November 2024. Adjacent to it, the Andaz One Bangkok by , set to open in December 2025 in a 24-storey tower, will provide 244 stylish rooms and suites infused with local art and cultural elements, promoting a vibrant, lifestyle-oriented stay. This art-centric includes facilities such as a , , rooftop dining, and event spaces tailored for creative and leisure pursuits, appealing to long-stay guests seeking an immersive experience. Complementing these, Fraser Suites Bangkok offers 261 serviced apartments across the top ten floors (36th to 45th) of a 45-storey tower, opening in late 2026, with fully equipped kitchens, sky bar, and all-day dining to support extended stays blending work and relaxation. The residential towers emphasize premium condominiums designed for affluent buyers, featuring bespoke units with sweeping views of and the city skyline, such as those in ONE89 Wireless (90 units) and EI8HTEEN SEVEN (offering 1-3 bedroom options starting at 63 sqm). These residences incorporate luxury amenities like infinity pools, private gardens, 24-hour security, and fitness centers, fostering a seamless integration with the development's retail podium below for convenient urban living. Targeted at high-net-worth individuals, the designs prioritize and , with spacious layouts and high-end finishes to enhance daily comfort.

Retail and Cultural Facilities

One Bangkok's retail facilities are structured around four interconnected podiums that form a comprehensive and . These podiums encompass a total net lettable area of over 160,000 square meters, designed to integrate seamlessly with the surrounding urban fabric. The development features more than 900 stores across a "Retail Loop," offering a mix of established and emerging brands, retailers, and home goods outlets, including the iconic Japanese . Experiential zones within the podiums, such as the nine-floor area spanning 85,000 square meters, emphasize boundless choice through entertainment venues and interactive spaces that cater to diverse shopper preferences. Food halls like the World-Class Food Destination provide high-quality international and local selections, including fresh produce, meats, and , enhancing the retail experience with culinary variety. The cultural facilities at One Bangkok integrate art and performance elements to foster creative engagement within the urban environment. Key components include dedicated art galleries and public art collections that feature outdoor sculptures and installations, redefining city spaces as sources of daily inspiration. Performance spaces support a range of events, from exhibitions to live shows, managed by an in-house Art & Culture team that embeds these elements into the district's core programming. The One Bangkok Art and Culture Centre serves as a central hub for these initiatives, promoting contemporary arts and community interaction through curated programs that blend local and international influences. Dining options across the retail podiums range from accessible street food vendors to upscale establishments led by world-renowned chefs, positioning these areas as vibrant social hubs. With over 250 restaurants offering cuisines from authentic Thai and Italian to innovative fusion, the venues emphasize communal dining experiences that encourage lingering and interaction. High-end outlets aim for Michelin-level excellence, featuring sophisticated menus that highlight premium ingredients and culinary artistry, while casual zones replicate Bangkok's culture in a polished setting. These retail and cultural amenities connect via expansive public plazas and open spaces, facilitating events, markets, and seasonal gatherings that extend the offerings beyond indoor facilities. The plazas, covering significant portions of the 17-hectare site, host product launches, art festivals, and pop-up markets, creating fluid transitions between shopping, dining, and cultural activities. This integration enhances accessibility and community vibrancy, with green terraces providing shaded outdoor extensions for retail and events.

Sustainability Features

Environmental Certifications and Goals

One Bangkok has achieved for Neighborhood Development ( ND) Platinum certification for all its buildings, marking it as 's first project to attain this distinction for an entire integrated district, emphasizing superior performance in , , , and indoor . Additionally, it is the first development in to secure ratings for both WiredScore, which evaluates digital connectivity infrastructure, and SmartScore, which assesses smart building technologies including automation and cybersecurity. The project also targets WELL certification to promote occupant health through optimized air, water, light, and wellness features, alongside TREES-NC compliance under 's national standards. Sustainability goals focus on significant reductions in through innovative design and systems. The district aims for a 25.70% overall reduction compared to 90.1-2010 baselines, achieved via passive design elements, high-performance envelopes, and integration, alongside a system that saves approximately 17,000 MWh of electricity annually and reduces carbon emissions by 9,000 tons per year. management targets 40% savings through comprehensive systems that treat for non-potable uses such as , flushing, and cooling, utilizing native and low-flow fixtures to minimize municipal supply dependency. Biodiversity enhancement is prioritized with over 50% of the site's land dedicated to green spaces, including 8 hectares of interconnected parks that link and , featuring 42,000 square meters of diverse planting with 178 native and rare species to support urban ecosystems and improve air quality. The project aligns with several , particularly SDG 11 (Sustainable Cities and Communities) and SDG 13 (), by incorporating climate-resilient features like flood-resistant infrastructure, adaptive green corridors, and resource-efficient operations to mitigate urban heat islands and enhance long-term environmental adaptability.

Infrastructure and Utilities

One Bangkok features a centralized that produces chilled water at a dedicated facility and distributes it through insulated pipes to buildings across the development, achieving up to 22% savings compared to traditional large-scale HVAC . This annually saves 17,000 MWh of and reduces CO2 emissions by 9,000 tons, while minimizing use and . The development incorporates a powered by two incoming high-voltage lines, enabling automated disruption management and efficient energy distribution to support reliable throughout the complex. Waste management includes a food waste composting system that converts organic waste into for use in gardens, parks, and , processing over 123,099 kilograms of food waste from March 2024 through July 2025. This process reduces and contributions by drying and treating waste on-site. Transportation infrastructure provides direct underground connections to the Lumphini station and shuttle services to the at Ploenchit, complemented by 5 kilometers of pedestrian paths and bike lanes to promote sustainable mobility. Underground parking accommodates over 12,000 vehicles, equipped with a smart system for real-time availability monitoring. One Bangkok is pursuing WELL Building Standard Platinum certification, incorporating health-focused utilities such as air quality monitoring via over 3,000 sensors, 14 filters to capture PM2.5 and PM10 particles, and UV germicidal systems. These features ensure high indoor environmental quality, including touchless access controls and NSF-certified on every floor.

Construction and Timeline

Construction Phases

The construction of One Bangkok was executed in distinct phases to manage the complexity of developing a large-scale mixed-use district in a densely populated . Phase 1, often referred to as One Bangkok One, commenced with site preparation and foundational works in March 2018, including the installation of 585 bored piles (1.8 meters in diameter and up to 80 meters deep) by Thai Bauer, which were completed by April 2019. This phase focused on establishing the groundwork for the initial tower and interconnected retail podium, with a landmark mat foundation pour for the 170-meter tower occurring on February 17, 2020—utilizing 23,725 cubic meters of low-heat and 2,200 tons of steel over 33 hours and 15 minutes, marking the largest such pour in Southeast Asia's history. To minimize environmental and community disruption during these early works, the project implemented dust control systems, air and sensors, and vehicle wash bays. Subsequent phases involved the superstructure development of additional towers starting from 2020 onward. Construction on Towers 2 through 5 began progressively between 2021 and 2022, with Tower 2 breaking ground in 2021 as part of Phase 2, which encompasses further and retail expansions targeted for completion by 2025. Phase 3, centered on and residential towers, saw initial works on structures like the 436-meter One Bangkok O4H4 (a , also known as the Signature Tower) starting in 2018 but accelerating post-Phase 1 foundations, with completion slated for 2030. Throughout the project, a peak workforce of over 9,000 personnel was engaged daily across the 17-hectare site, adhering to Thai labor laws and safety regulations enforced by the Department of Labour Protection and Welfare. These phases collectively enabled the staged assembly of 11 towers and four podiums totaling 1.83 million square meters of , with an emphasis on coordinated efforts to maintain efficiency in the urban context.

Milestones and Current Status

The groundbreaking ceremony for One Bangkok occurred in June 2019, initiating the construction of this expansive in central . Subsequent progress included the of the first office tower in 2023, a key structural milestone that advanced the project's Phase 1 development. The Phase 1 s officially opened on March 18, 2024, introducing approximately 200,000 square meters of Grade A to the market. The Ritz-Carlton opened in November 2024. The Andaz hotel, the development's first luxury hospitality component under Hyatt's Andaz brand, is slated to open in 2025. The caused significant delays to the timeline, shifting phased openings from earlier projections and extending the full project completion to 2030. As of November 2025, construction of the Signature Tower (O4H4)—the development's tallest structure at 436 meters—remains ongoing, with foundational works completed and advancement amid the broader phased approach. In November 2025, One Bangkok continues phased openings, with retail podiums fully operational since their grand launch on October 25, 2024, and active construction proceeding on remaining office, residential, and hotel towers. This status reflects steady advancement toward the 2030 target, supported by the operational success of initial components that have already attracted significant tenancy and visitor traffic.

Economic and Social Impact

Tenancy and Economic Contributions

One Bangkok's office towers have demonstrated strong leasing momentum. As of October 2025, Tower 4 has achieved an occupancy rate of 80-85%. This success is evidenced by commitments from prominent international tenants, including Estée Lauder Companies, BMW Group Thailand, Baker McKenzie Ltd., and financial institutions such as KGI Securities (Thailand) Public Company Limited. These agreements highlight the project's appeal to global corporations seeking high-quality, sustainable office spaces in central Bangkok. The leasing strategy at One Bangkok emphasizes securing long-term contracts with blue-chip tenants to foster occupancy stability and mitigate market volatility. By prioritizing durable partnerships, the development ensures consistent and supports ongoing operational enhancements, aligning with broader goals of economic in the . Economically, One Bangkok is expected to boost and attract foreign through its integrated facilities, elevating Pathum Wan's profile as a premier business hub and reinforcing Bangkok's position in regional commerce. The influx of multinational tenants further draws additional capital to the area.

Cultural and Community Role

One Bangkok serves as a pivotal cultural in central , integrating and public life to enhance urban vitality and foster community engagement. Through its Art & Culture initiative, the development hosts a range of exhibitions featuring paintings, sculptures, , and digital works by both international and local artists, including emerging Thai contemporary talents showcased in versatile indoor galleries and the immersive Art space. This programming redefines traditional exhibitions by embedding them within everyday urban experiences, promoting accessibility and the vitality of Thai scenes. The One Bangkok Art Centre plays a central role in nurturing Thai contemporary artists by providing platforms for their works and supporting sustainable growth in the local art ecosystem. Signature events, such as art festivals and seasonal cultural activities curated by an in-house team, include representative examples like the MOONLAB 2025, which combined art installations, music performances, and interactive experiences to celebrate Thai creativity. Additionally, permanent public sculptures, such as "Zero" by and "Fly" by Alex Face, form part of the One Bangkok Collection, enriching the district's landscape and inviting public interaction. Community programs further amplify One Bangkok's role in public life, offering workshops, artist talks, and to green spaces that encourage learning and social exchange among residents and visitors. These initiatives, including youth development support for neighboring communities, connect artists, collectors, and enthusiasts while providing equitable access to over 50 of urban parks that link major green areas like Lumphini and Benjakitti Parks. By bridging commercial spaces with creative endeavors, One Bangkok redefines central as a dynamic cultural node, elevating the as an destination for alongside and . Strategic partnerships with cultural institutions and public-private collaborations, such as those supporting connectivity events, host festivals and exhibitions that promote social cohesion in this high-density area, uniting diverse communities through shared artistic experiences.

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