How long does it take to build a house
How long it takes to build a house depends on two phases: the permit process, which local officials must complete within roughly 45 days under Thai law, and the actual construction, where a single-storey house takes roughly 4 to 6 months and a two-storey house roughly 6 to 9 months. Combined, a full project typically runs 5 to 12 months, depending mainly on land document readiness and how many crews the contractor has available.
- The building permit review takes roughly 45 days under Thai law.
- A single-storey house takes roughly 4 to 6 months on site.
- A two-storey house takes roughly 6 to 9 months on site.
- Mid-build plan changes and crew shortages are the top causes of delay.
How Long Does It Take to Build a House Before the First Pile Is Driven
Anyone planning a new home in Isan asks the same first question: how long does it take to build a house from start to move-in day. The honest answer splits into two phases people often forget to separate: preparation before work begins, and the actual construction on site.
The preparation phase starts with choosing a house plan, signing a contract with a contractor or home-building company, and submitting a construction permit application with the local authority. Homeowners in Korat and Roi Et often lose more time here than expected, usually because land documents are incomplete or the plan needs several revision rounds.
The construction phase runs from the day the crew arrives on site to the final inspection and handover. People usually hear a number in months, but the real duration varies a lot depending on house size, crew availability, and the weather during each season.
How Long Does the Building Permit Process Take
A construction permit application is filed with the local SAO (Or Bor Tor, the sub-district administrative organization) or municipal engineering office covering the land. Under Section 25 of the Building Control Act B.E. 2522, local officials must review and respond within 45 days of receiving the application, and where necessary they may extend that twice more by up to 45 days each, giving written notice of the reason each time. Plan for more than 45 days on this step (referencing Section 25 of the Building Control Act B.E. 2522).
In practice, many areas in Isan move faster than that if documents are complete from the first submission. But if the plan needs revision, extra engineer certification, or the land falls under zoning restrictions, approval can stretch several more weeks without much warning.
Homeowners who plan well submit the permit application while the contractor prepares the site, such as temporary fencing or an access road, so the waiting period for approval is not wasted time.
How Long Does It Take to Build a House for a Single-Storey Home
A mid-size single-storey house common in Korat and Pak Chong takes roughly 4 to 6 months on site, counted from piling to final inspection. No government agency publishes this figure officially; it is the range local building crews commonly reference among themselves.
The slowest part of a single-storey build is usually not the structure but the electrical, plumbing, and interior finishing work, especially when tiles or bathroom fixtures need special ordering with no local stock available.
If the land was recently filled or previously flooded, the real timeline can shift further because the soil needs time to settle before piling, a separate clock from the one estimated at the start.
How Much Longer Does a Two-Storey House Take
A two-storey house takes roughly 6 to 9 months, longer than a single-storey home because of the second-floor structure, staircase work, and the curing time needed for concrete on each level before work can continue.
Curing concrete for each floor’s slab and beams needs at least several days before it can bear full load again. If a contractor rushes past this step, the risk of cracking or later settlement rises accordingly.
In Roi Et and upper Isan, the rainy season affects two-storey builds more than single-storey ones, since upper-floor structural work must stop during heavy rain, letting delays pile up more than expected.
What Makes Building a House Take Longer Than Expected
The top cause is changing the plan mid-construction. Many homeowners want to adjust a room layout or swap materials after work has started, and every change forces a pause on existing work while new materials are ordered, a real delay bigger than it looks at decision time.
Another cause is crew shortages. Contractors juggling several sites at once often rotate crews between them, leaving a house with a week or more of no activity on site at all.
Land condition and material transport distance matter too. Land in Khao Yai or on sloped terrain takes longer to prepare on site, and some delivery trucks struggle to reach it compared with flat land.
Planning Your Build Timeline More Accurately
What actually helps is asking the contractor for a week-by-week timeline before signing, not just a total number of months. A detailed timeline shows which tasks are most likely to slip and need extra follow-up.
OBILIS ties its project schedule to payment installments and the BOQ (bill of quantities) before construction starts, so homeowners can see in advance when each phase should finish and get notified immediately if something pushes the plan back.
If you want a figure for the house you actually have in mind, try the budget planner first, or contact us for an estimate based on your real plan and land.
If the goal is moving in by a specific date, such as before a festival or before the school term, build in at least one extra month beyond the normal schedule, since weather and site conditions can never be fully controlled.
Frequently Asked Questions
How long does it take to build a house including the permit process?
Counting from permit application to final inspection, the total runs roughly 5 to 10 months for a single-storey house and 7 to 12 months for a two-storey house, depending mainly on document readiness and crew availability.
Why does the same house design take different amounts of time in different places?
Land condition, material transport distance, and how many crews a contractor has on hand all differ. The same design in Korat versus Khao Yai can end up several weeks apart in total build time.
When should I submit the building permit application?
As soon as the house plan and land documents, including the title deed (chanote), are ready. There is no need to wait until the construction contract is fully signed, since the two steps can run in parallel and shorten the overall project timeline.
Key facts at a glance
| Legal permit review period | roughly 45 days (Dept. of Public Works and Town & Country Planning) |
|---|---|
| Single-storey construction time | roughly 4-6 months |
| Two-storey construction time | roughly 6-9 months |
| Total project time, single-storey | roughly 5-10 months |
| Total project time, two-storey | roughly 7-12 months |
| Most common cause of delay | mid-build plan changes and crew shortages |
Frequently asked questions
How long does it take to build a house including the permit process?
Counting from permit application to final inspection, the total runs roughly 5 to 10 months for a single-storey house and 7 to 12 months for a two-storey house, depending mainly on document readiness and crew availability.
Why does the same house design take different amounts of time in different places?
Land condition, material transport distance, and how many crews a contractor has on hand all differ. The same design in Korat versus Khao Yai can end up several weeks apart in total build time.
When should I submit the building permit application?
As soon as the house plan and land documents are ready, without waiting for the construction contract to be fully signed, since the two steps can run in parallel.
What usually makes a house build run late?
Changing the plan mid-construction, contractors juggling several sites with too few crews, and land or weather conditions that cannot be fully controlled.
