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Chiang Mai Home Construction Cost Guide
24 August 2026A cost per square metre is only a starting reference; a useful estimate must describe the design, site, specifications and inclusions.
What determines the cost of building a home in Chiang Mai?
Greenery recommends comparing proposals on the same drawings, specifications and scope. Early figures should be treated as preliminary until site information and coordinated documents are available.
Who this service is for
- Owners setting a realistic project budget
- Families comparing builders or design-and-build routes
- Clients deciding which features belong in the first phase
What to discuss before the project starts
- Usable area versus total construction area
- Site preparation, access and temporary works
- Structure, envelope, finishes and building systems
- Professional fees, permits, exclusions and contingency
Our planning and coordination process
- Define the brief and target budget range
- Collect land and site information
- Develop comparable drawings and specifications
- Review quantities, allowances, exclusions and change procedures
Why site-specific planning matters in Chiang Mai and Lamphun
Transport access, soil and fill conditions, drainage, retaining work and local material availability can materially affect Chiang Mai project costs.
Frequently asked questions
Can you price a house from a reference image?
An image can clarify style, but a meaningful estimate needs area, site, drawings, systems and specifications.
Why do contractor prices differ?
They may use different scopes, quantities, material grades, allowances, exclusions and risk assumptions.
Discuss your project with Greenery
Explore our house designs, review the construction portfolio, learn about Greenery, or contact our team.
Book a free initial consultation with an architect. Architectural drawings and design services are not included free of charge.
Build the budget in layers
A reliable Chiang Mai home construction cost discussion separates the base building, site-related work, professional services, authority requirements, owner purchases and contingency. DPT’s public-plan catalogue describes its displayed construction prices as preliminary guidance; DPT also states that site plans, soil conditions, foundation selection and current cost calculations must be reviewed for the actual location. A generic price per square metre is therefore a starting reference, not a quotation.
Layer 1: define the measurement basis
Record how floor area is measured and whether terraces, carports, balconies, double-height spaces, service areas and pool structures are included. Two “square-metre rates” may use different denominators. Compare the underlying area schedule, not just the division result.
Layer 2: identify site and authority costs
Access, demolition, fill, retaining work, drainage, temporary utilities, survey, soil information and utility connections can materially change the project. Add professional design, engineering, permit-related and testing items where applicable. Confirm the local document list instead of assuming every site needs the same items.
Layer 3: price a coordinated scope
Drawings, specifications and quantities should describe the same project. Mark provisional sums and exclusions. Ask how material substitutions, owner changes and unforeseen conditions are approved and priced. The OCPB advises consumers to review the work scope, contractor history and payment conditions before contracting.
Use a budget-control worksheet
- Approved target budget and items outside it
- Current design area and revision date
- Base building, systems and finish allowances
- External works, utilities and landscape
- Professional, authority and testing items
- Owner-supplied furniture and equipment
- Contingency appropriate to design maturity and site uncertainty
- Approved variations and remaining reserve
Read our quotation comparison guide and construction finance preparation guide, or book an initial free architect consultation. It does not include free drawings or free design.
Sources
- DPT Public Plans — Site adaptation and preliminary-estimate guidance (accessed 16 August 2026)
- DPT — Public plans and indicative construction prices (accessed 16 August 2026)
- Office of the Consumer Protection Board — Guidance on hiring contractors (accessed 16 August 2026)