Start a home-renovation budget by defining the scope of work rather than relying only on a price per square meter. Structural condition, building systems, demolition, material delivery, and site access all affect cost. This checklist helps you prepare information to compare contractors; it is not a quote or engineering advice.
1. Separate Essential Work from Optional Work
List the problems to fix and the result you want. Separate safety or damage-prevention work—such as faulty wiring, leaks, or structural problems—from cosmetic work that can wait. If you find structural damage, ask a qualified professional to inspect the site before setting a budget.
2. Request Quotes for the Same Scope
- Specify areas, quantities, material models or quality, and exclusions.
- Separate material costs, labor, demolition, disposal, building systems, and finishing work.
- State start and completion dates, inspection procedures, warranties, and payment milestones.
- Require approval before a scope change or extra cost begins.
- Request quotes from several contractors using the same list so the offers can be compared.
Do not compare only the total. If materials, quantities, systems, or warranty terms differ, ask for an explanation or request revised quotes with comparable scopes.
3. Plan a Contingency and Cash Flow
In addition to materials and labor, consider temporary accommodation, storage, transport, utilities, issues discovered after demolition, and project-specific costs. Keep contingency money separate from the main budget and agree in advance how extra work will be approved. The Bank of Thailand recommends reviewing large expenses and saving before borrowing where possible. See its guide to planning for large expenses.
If you need to borrow, calculate the new obligation using your actual income and debt before committing. Avoid using all of your emergency savings for work that can be postponed. Plan upcoming expenses with the monthly budget planner and use the 50/30/20 budgeting framework as a starting point.
4. Check Permits and Inspect Work at Each Stage
If the work may alter a building, ask the responsible local authority whether your specific project requires approval. The Department of Public Works and Town & Country Planning provides an application system for construction, alteration, demolition, or relocation of buildings. The form itself does not determine which permit applies to a particular home.
Inspect agreed milestones before surfaces or pipes are covered, and keep photos and inspection notes. If extra work is proposed, document its price and revised timeline before approving it. Check the completed work against the contract before making the final payment.
Limitations
Material prices, labor costs, and requirements vary by location and type of work. This page does not provide a standard rate, endorse a contractor, or replace review by an engineer, architect, or local official. The attached NASDAQ video is an existing reference and does not discuss renovation work.