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5 Firms With the Best Architects in Bangkok

7 Firms With the Best Architects in Bangkok

How We Picked

Range of services

We evaluated this based on the firm’s services offered.


This is based on previous client reviews, our own experience, and service pricing matrixes offered by the firm. 


While each firm’s work highly depends on the architects, interior designers, or engineers, it’s still up to the establishment to uphold certain standards consistently.

Projects made

We evaluated this based on the firm’s finished projects.

Client satisfaction

We based these on our surveys and client reviews around the web.

1. Delcoi 

Delcoi Homepage

Services: Architecture, Interior Design, Construction


Address: 62 The Millenia tower No.1806, 18th floor, Soi Langsuan, Pathumwan, Bangkok 10330 Thailand

Contact Information: 02-566-0445

Services for convenience: Online contact form, LINE chat, email, phone number

Google Reviews Score4.8/5 Score5/5 Score5/5
Total Reviews4/5
Score Consistency4/5
Range of Services5/5
Projects Made4/5
Client Satisfaction5/5


  • Over 10 years of experience
  • Free consultation
  • Full package (architecture, interior design, construction)


  • Doesn’t have social media presence

Delcoi was founded in Bangkok, Thailand, by a group of interior design experts. It has over ten years of experience providing custom interior solutions. 

Its interior design team produces one-of-a-kind designs that turn the essence of any area into a memorable and functional layout.

We think Delcoi’s very approachable vibe makes it stand out. It communicates to clients in a very conversational and friendly way and aims to give as much information as it can. 

In fact, it has a frequently asked questions section on its website that can help clients gain more insights about the company, which will help in their decision-making. 

Another thing we like is that the company provides complete samples or visuals during the initial consultation. According to prior customers we spoke to, Delcoi effectively transforms their imagination into reality. 

We think that’s partly because expectations are set and communicated early on. We were rather amazed by the team’s communication skills, making every detail, plan, and process accurate and flow smoothly. 

The company’s services, especially its interior designing skills, are up to par, making them able to turn your dream house into reality. 

This is especially great for clients who don’t know what style will suit them, or those without any knowledge about interior design, architecture, renovation, construction, or simple home improvement in general.

However, potential clients won’t be able to conduct a thorough research about the company beforehand. 

It lacks a social media presence, which we think is required in this day and age to attract and keep clients updated.

2. N-Architects

N-Architects Homepage

Services: Architecture, Design, Project Management


Address: 59 Sukhumvit 40, Prakanong Klongtoey Bangkok 10110 Thailand

Contact Information: +6664 242 4647

Operating Hours: Monday – Friday: 9:00 – 18:00

Services for convenience: Email, phone and fax number

Google Reviews Score5/5
Facebook Reviews4.5/5
Total Reviews4/5
Score Consistency4/5
Range of Services4/5
Projects Made4/5
Client Satisfaction4/5


  • Has other services aside from architecture
  • Over 30 years of experience
  • Classic design


  • Doesn’t have that many projects
  • Website’s content is somehow unclear 
  • Lacks attention to detail 

n-architect’s objective is to design with an architectural vision and to express the identity of each of its projects. 

We like that it doesn’t go by a fixed model or style. Instead, it conducts detailed research to come up with new designs for different locations and customers.

It has a sharp eye for detail and uses experience and passion to produce distinctive classic architecture. Its group of creative and diverse designers studies the history and stories of each project to create its very own architectural identity.

It’s obvious to us that each of them wants to make a meaningful impact in the field. And they do this through a strong dedication to the design quality of each project.

n-architects is also great at interior design. Like any other architectural firm, it provides excellent ideas to improve your space and create an inviting ambiance. 

Its design is more classic in nature, which stems from its goal of preserving the story of each location. So, if you’re the kind of person that’s into nostalgia, n-architects is a great option for you!

The downside we found is the company’s website. It doesn’t provide enough details about its services. The content is also unclear and frankly, there were a lot of typographical errors; in short, it seems like the website is not updated.

Another thing that we noticed is while n-architects has been in the industry long enough, it doesn’t have that many projects in its portfolio.

3. Architects 49

Architects 49 Homepage

Services: Architecture, Master Planning, Sustainability, BIM, Model Studio


Address: 81 Soi Sukhumvit 26, Khlong Tan, Khlong Toei, Bangkok 10110 Thailand

Contact Information: +66 2260 0161

Service for convenience: Phone and fax number, email

Google Reviews Score4.6/5
Facebook reviews Score4.9/5
Total Reviews3.5/5
Score Consistency4/5
Range of Services4/5
Projects Made5/5
Client Satisfaction4/5


  • Has several awards
  • Almost 40 years in the industry
  • Wide-range of services/ expertise
  • Many projects made
  • Has a social media presence
  • Has different branches in Bangkok


  • Doesn’t have engineering services

Founded by Nithi Sthapitanonda in 1983, Architects 49 is focused on architectural design that is ageless, boasting clean, simple, and elegant lines. 

With a strong interest in Thai art and architecture, its founder laid the framework for future generations to improve on. 

Its team has grown to almost 200 members, and they now work on projects throughout Asia and the Middle East. Its diversified workforce allows the architects to design an array of architecture, from tiny residential projects to major mixed-use projects. 

From contemporary to classic, there’s something for everyone. It takes a different approach for each project and ensures that each one should have its distinct personality.

With almost 40 years in the industry, Architects 49 has already collaborated with many companies and has built and designed several establishments, from halls to headquarters and studios to towers. 

We think the people working here are nice and would offer you great service. Its knowledgeable team, some of whom have been with the company for over 20 years, ensures that the project’s practical and financial goals are reached. 

In addition, the concept stage is continually updated with new ideas from newer generations. Its trademark has historically been the nature of this collective approach.

Since 1987, Architects 49 has received numerous awards both locally and internationally.

However, we’re disappointed it doesn’t offer an engineering service, which is quite a turn-off.

4. Openbox Architects Co. Ltd

Openbox Architects Co. Ltd Homepage

Services: Architecture, Interior Design, Engineering, Project Management, Landscape


Address: 20 Bubhajit Bldg. 12th Fl, N.Sathorn Rd. Silom, Bangrak District, Bangkok 10500 Thailand

Contact Information: +662 026 3236

Operating Hours: Monday – Friday: 9:00-18:00

Service for convenience: Online contact form, email 

Google Reviews Score4.9/5
Facebook reviews Score4.7/5
Total Reviews4/5
Score Consistency4/5
Range of Services5/5
Projects Made5/5
Client Satisfaction4/5


  • Several awards received
  • 18 years of experience
  • Clear content on website
  • Modern architecture
  • Strong social media presence


  • Unresponsive 

OPENBOX has been involved in various projects over the last 17 years that demonstrate the value of a clear concept, boldness, and harmony between architecture and its environment.

To emphasize the power of a single design concept, it has expanded its service offerings to include architectural, landscape, and interior design. 

Working with several brands, companies, and corporations, OPENBOX has made its name in the industry of architecture. Its past projects, which are displayed on its website, are detailed and show potential clients what to expect and what it can offer. 

As an architectural firm, it’s always looking for ways to improve its services and deliver the best possible experience for its clients.

OPENBOX is always a pleasure to work with. Its team is creative and always willing to go the extra mile to make sure its clients are happy. 

If you’re into modern and sleek designs, OPENBOX is the right firm for you. 

Unfortunately, we think the company doesn’t provide quick and responsive customer service, which is a downside if you’re still in the process of choosing what firm you should hire. 

We would have appreciated more information about what the firm could offer, as well as its rates. But this information was not provided to us easily. 

5. Tandem Architects 

Tandem Architects Homepage

Services: Architecture, Interior Design, Masterplan


Address: 193/60 15th Fl., Lake Rajada Office Complex, Ratchadapisek Rd., Klongtoey, Bangkok 10110, Thailand

Contact Information: +66 85 140 5454

Operating Hours: Monday to Sunday, 10:00 am to 10:00 pm

Google Reviews Score4.9/5
Facebook Reviews Score4.9/5 Reviews Score5/5
Total Reviews4.5/5
Score Consistency4/5
Range of Services4/5
Projects Made5/5
Client Satisfaction4/5


  • Named one of BCI Asia’s Top 10 Thailand Architects
  • Has a social media presence
  • Provides detailed projects
  • 35 years of experience


  • Doesn’t have engineering in services
  • Lacks attention to detail 

Tandem Architects, founded in 1987, has grown into a business with vast experience in various projects, working with hotels, resorts, condominiums, residential development, office buildings, retail, and individual houses. 

The firm offers customers a high level of knowledge and professional skills, with the confidence to take on even the most challenging tasks. Its ultimate goal is to find the best solutions for each project. 

Tandembelieves that the best designs come from a vision free of expectations and traditions. It has completed over 600 projects and has been named one of BCI Asia’s Top 10 Thailand Architects.

With the architects and personnel having different backgrounds and experience in architectural education, they can integrate your ideas and turn your vision into a reality. 

We think the firm has an arsenal of both passionate young architects and more seasoned ones, combining expertise with fresh ideas. 

Its dedication to design and development has allowed it to apply its collective knowledge to many projects in Thailand and other countries. And this shows us its professionalism.

We’re a bit disappointed that the company does not provide engineering services, which is a significant disadvantage for clients building a project from the ground up. 

If you need a full-service firm, you’re better off with the other entries on this list. 

6. HAS Design and Research

Services: Architecture Services


Address: 604/186, Soi. Phetkasem 92/1, Phetkasem Road, Bangkhae, Bangkok 10160, Thailand

F4, 258 Fengxian Road, Jingan District, Shanghai 200040, China

Contact Information: [email protected]

Services for convenience: Email, Online Appointment, Onsite Services

Google Reviews ScoreNA/5 Score4.9/5 Score5/5
Total Reviews4/5
Score Consistency4/5
Range of Services5/5
Projects Made5/5
Client Satisfaction5/5


  • Unique and natural style of design
  • Internationally recognized
  • Quality project management expertise


  • Limited contact and scheduling means

HAS Design and Research is an architectural studio that combines research and design when it comes to coming up with various buildings and establishments may it be for commercial, cultural, or residential purposes.

Headed by Jenchieh Hung and Kulthida Songkittipakdee, their firm has since then been recognized internationally for winning competitions and awards such as the Wallpaper Architects’ Directory 2022 among other recognitions in the academia.

With their unique approach to architecture by emphasizing the analogy of nature with man-made styles, they have since then consistently delivered successful projects which says a lot about their work ethics and quality assurance.

Note that there aren’t any rates or service packages readily available on their website so clients may need to reach out to them first for further inquiries.

Nonetheless, with their diverse architectural experience, and distinct yet natural approach in terms of style that bring out the best in each experimental project, we recommend them to clients looking for a unique take on their building.

7. art4d CO Limited

Services: Architecture/Design/Art Media & Organizer



7th Floor, Krung Thai Tractor Building
3675, Rama 4 rd., Prakanong, Klongtoey
Bangkok 10110, Thailand

Contact Information:

T +66 2260 2606-8
F +66 2260 2609
[email protected]

Services for convenience: Contact for more information

Google Reviews Score5/5 ScoreN/A ScoreN/A
Total ReviewsN/A
Score ConsistencyN/A
Range of Services3/5
Projects Made3/5
Client Satisfaction3/5


  • Began in 1995
  • Connects those in the architectural profession


  • No information about architects and services on website

art4d CO Limited began in 1995 as a magazine created by designers for designers, and they aim to serve as publications meant for the community of creative professionals and participants.

It’s for the exclusive benefit of designers, architects and artists as means for them to exchange ideas amongst circles locally and globally.

They feature the annual ASA Architect Expo, an event where many individuals working within the architectural profession go.

We think this event is the perfect way in which you can find very talented architects for your next project.

Though we find unfortunate that they have no information on architects and their services on their website so it’s unhelpful for any potential client seeking architectural services.

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