Interior Design Firm in Bangkok

STEVEN J. LEACH JR. + ASSOCIATES LIMITED. STEVEN LEACH ARCHITECTS LIMITED

Established in 1992

SL+A Bangkok's service offering reflects the unique demands of Thailand's built environment — a market that requires both creative vision and technical rigour.

Our workplace design in Bangkok practice covers interior design, workspace strategy, design & build, and project management. We work with multinational corporations, Thai conglomerates, and public sector clients to create workplaces that balance international design standards with Thai cultural context.

For commercial interior design Bangkok projects, our team brings deep expertise in corporate offices, mixed-use commercial developments, retail environments, and hospitality interiors. Our Architectural Design capability — covering high-rise commercial, residential, and institutional buildings — means we can take on integrated briefs that span both interior and exterior.

Data centre design is a particular specialism within SL+A Bangkok, where the intersection of highly technical requirements and considered environmental design demands a team with both engineering knowledge and design capability. Sustainable Design is embedded in all of our project work, supporting clients pursuing international green building certifications.

ADDRESS18th Floor The Millennia Tower
62 Soi Langsuan, Ploenchit Road,
Lumpini, Pathumwan, Bangkok 10330

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TEL / INQUIRIESContact Us Online
FAX+662 650 5587
EMAILbangkok@sla-group.com

SL+A GROUP

FAQs

What services does Steven Leach Group offer in Bangkok?

SL+A Bangkok provides interior design, architectural design, sustainable design, design & build, and project management — with specialist expertise in data centres and high-rise commercial buildings.

What makes SL+A Bangkok distinctive in the Thailand market?

Since 1997, SL+A Bangkok has expanded into architectural design consultancy, becoming one of Thailand's leading firms in high-rise commercial buildings and data centre design alongside its interior design practice.

Why choose an interior design firm in Bangkok with architecture capabilities?

Bangkok's development landscape often requires integrated interior and architectural expertise. SL+A Bangkok offers both under one roof — reducing coordination complexity and ensuring design coherence from exterior to interior.

What sectors does SL+A Bangkok specialise in?

We work across corporate, hospitality, retail, residential high-rise, and data centre sectors — serving both Thai and multinational clients with innovation, technical precision, and sustainability at the core.

How do I contact SL+A Bangkok?

Our office is at 18th Floor, The Millennia Tower, 62 Soi Langsuan, Ploenchit Road, Lumpini, Pathumwan, Bangkok. Email bangkok@sla-group.com or visit sla-group.com/contact.

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