Calculate the cost of building a house — all estimates.
Formula: Total cost = (area × value per sq. m.) + additional value
Cost of Building a House Calculator
The Cost of Building a House Calculator estimates a property-cost or return estimate for your scenario from the property value, financing or rental assumptions, time period, fees and rates shown on the page. Replace the example values with your own building house figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Enter the area of the house, the price per square meter, the additional costs and the percentage of reserve to see the total budget before talking to the contractor, the bank or the family.
Quick answer.
Building a house 180 sq. m. x 20,000 baht/sq. m. plus additional value 300,000 baht and in case 15% must prepare about 4,485,000 baht
This example is calculated from the main cost 3,600,000 baht plus additional values to 3,900,000 baht and reserve money 585,000 baht used as a starting budget before requesting BOQ or actual quote
Installments and interest are numbers for preliminary screening of plans. Before actually applying, you should compare rates, fees, and conditions from service providers.
Calculated based on the principal, rate and term you enter.
This does not include certain types of fees, insurance or specific promotional conditions.
The total installment should not put pressure on monthly cash flow.
For preliminary budgeting, a typical house usually starts at 12,000–22,000 baht/sq. m. and premium work may be higher than 22,000 baht/sq. m. Actual figures depend on type, materials, location, soil condition and contractor's quote.
What costs are included in building a house?
Include materials, labor, structural work, architectural work, electrical work, plumbing, sanitation, doors, windows, paint, roofing, design fees, permit fees, and outside expenses like fences, parking lots, or landscaping.
How many percent should I set the other extra charge?
You should set aside a reserve of about 10-15% for the cleared-up model and 15-20% if you haven't locked materials or haven't got a BOQ yet because the cost of materials, labor and additional work along the way makes it easy to overpay.
What do you think you should do?
Take the total and compare it to cash, down payments, or home loan amounts, then ask for at least 3 contractor quotes and compare the list item-by-item, not just the total.
Disclaimer: Prices per sq. m. vary according to current material prices, location and quality of work. Consult architect/contractor for specific quotes.
English calculator guide
How to use the Cost of Building a House Calculator
Use this page to test a specific building house scenario. Enter your own values in the calculator above, review the units beside each field, and recalculate after changing an assumption. The result updates the cost of building a house estimate instead of relying on a generic example.
Build a baseline building house case with figures that match your situation.
Run a second building house case after changing the rate, period, quantity or other key assumption.
Record the difference between the two building house results and the input responsible for it.
Inputs for the building house estimate
For this building house calculation, check the property value, financing or rental assumptions, time period, fees and rates shown on the page. The result is designed to show a property-cost or return estimate for your scenario, not a guaranteed provider price or official decision.
How the building house result is calculated
The calculator combines the entered quantities, rates and fixed costs to produce the displayed estimate. Reusing the same building house inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a building house decision
Confirm current lender, tax, transfer and provider terms before committing. For building house, Use the result as a planning estimate and confirm any rate, rule or threshold that may have changed before acting. Recheck the entered values and units if the result looks unexpected.
Language QA
Terminology, numeric values and calculator controls checked
Review formula structure, test cases, data sources, effective dates, and risk language accordingly.How to check our · There is no claim that an outside professional reviewed it. Unless the page directly states the name and qualifications. This content is therefore not individual advice.
This history and results reside only in this device's browser. Press clear to delete immediately.
💾 Saved calculations
Save numbers only in this device's browser. It could be health or financial information. Therefore, the entered values or results are not sent to the server. You can delete them all from the button above. And data should be cleared when sharing the device with others.
Select 2–5. Items to compare
📊
There are no saved calculations yet.
Press the "Save" button after calculation to store the results.
