WHO ARE WE
More than 15 Years of Building Trust
9 Straight Construction Co., Ltd.
9 Straight Construction Co., Ltd. has been established since 2005. We began as a small contractor and have steadily grown through continuous development and improvement across all systems. By gaining hands-on experience and refining our processes over time, we have strengthened our capabilities to deliver high-quality construction services.
Today, we are a fully integrated construction company, offering comprehensive services including structural work, roofing, electrical systems, plumbing, interior finishing, aluminum, and glass installations.
Trusted By
OUR SERVICES
Comprehensive Construction Services — From Foundation to Finish
OUR PROJECTS
Trusted by Clients Across Every Project
K.A house
The work was delivered neatly and on time. The team was highly responsible, and the construction met expectations without any issues.
What stood out most was the foreman — he paid close attention to every detail and ensured everything was completed properly. It gave us real peace of mind.
“Safety is always the top priority.”
K.A house
Khun. A and k.Am
Overall, we are very satisfied with 9 Straight. Everything was completed within the agreed timeline and stayed within the planned budget.
Khun A: “The team was professional and easy to work with.”
Khun Am: “They were very helpful and took great care of us throughout the process.”
Khun. A and k.Am
Elder monk
“We chose 9 Straight because they had previously worked on Terminal 21 and had strong experience with large-scale projects.
The team worked efficiently and supported us closely throughout the entire process. We were able to clearly track progress at every stage.
We are very satisfied with the results — the work was completed exactly as planned, and everything went smoothly without any issues.”
Elder monk
Khun.Eak
“I’m truly impressed. The team was well-organized and delivered excellent work. They provided helpful guidance and made the whole process easy to understand.
The team was experienced, professional, and completed everything on time without any problems. Overall, it was a very smooth experience.”
Khun.Eak
Integrity Drives
Everything We Do
Why Choose 9 Straight
Built on integrity, fully transparent, no cost overruns, and delivered to standard.
We put care into every project — because every detail reflects who we are.
Clear Understanding from the Start
We guide you from the very beginning — from planning and cost estimation to design — ensuring your project aligns perfectly with your needs.
On Budget. On Time.
No hidden costs. No budget overruns. From design to construction, every step is controlled and delivered as planned.
Quality in Every Project
Whether small or large, every project is executed with the same level of care, professionalism, and high standards.
Transparent in Every Detail
No unexpected charges. No unnecessary add-ons. Every cost is clear and verifiable, with BOQ transparency for your confidence.
A Home… Designed Around You
Our team of architects and engineers is here to guide you from the very first step —
ensuring your home is built exactly the way you envision it.
OUR Specialty
We believe a “home” is more than just a structure.
It is a space filled with love, warmth, and the beginning of every family’s story.
Explore a wide range of home designs — from modern European styles to free-form concepts.
Starting from 50 sq.w., each home is thoughtfully designed and tailored to fit your lifestyle.
FAQ’s
Frequently Asked Questions
What is the minimum budget required to build a house?
The budget depends on several factors, including the size of the house, materials used, and location.
On average, construction starts from approximately THB 2–3 million for a standard home built on a 50 sq.w. plot in suburban Bangkok, using standard materials.
Where do I apply for a construction permit, and what documents are required?
As of 2026, construction permits can be submitted online via the BMA OSS system (for buildings not exceeding 2,000 sq.m. and 5 floors).
If all documents are complete and approved, results are typically issued within 14 days.
For submissions through local administrative offices (Subdistrict Administrative Organization, Municipality, or District Office), the process takes up to 45 days, provided all documents are correct and no revisions are required.
Required documents include:
- Architectural and Engineering Drawings (Complete Set)
- Architectural, structural, electrical, and plumbing plans
- Signed by licensed architects and engineers
- Architectural, structural, electrical, and plumbing plans
- Copy of Land Title Deed (Nor Sor 4 or equivalent)
- Certified true copy
- All pages must be included
- Certified true copy
- Letter of Consent for Construction (if the landowner is not the applicant)
- Along with a copy of the landowner’s ID
- Along with a copy of the landowner’s ID
- Copy of Applicant’s ID Card
- Power of Attorney (if someone submits on your behalf)
- With a copy of the representative’s ID
- With a copy of the representative’s ID
- Construction Permit Application Form (Form A.1)
- Available at district offices or via the BMA online system
How long does it take to build a house?
Construction time depends on the size and complexity of the project.
For example, a typical 2-storey house takes approximately 10–12 months to complete.
How are contractor fees calculated?
Contractors typically charge either per square meter or as a lump-sum contract.
As of 2025, the average cost for reinforced concrete residential construction is around
THB 22,000 – 30,000 per sq.m., depending on material specifications.
How can I determine if a contractor is reliable?
Review their past projects, ensure a formal contract is in place, and confirm that work stages and payment schedules are clearly defined.
Which materials are worth investing in?
Key areas that should prioritize higher-quality materials include:
- Structural components
- Electrical and plumbing systems
- Thermal insulation materials
Planning ahead for solar panels or smart home systems is also recommended, as it is more cost-effective than retrofitting later.
Is it required to have an engineer or architect supervise the project?
Yes. By law, qualified professionals must supervise construction.
For example:
- Structural engineers must approve load calculations for columns and beams
- Electrical engineers must oversee electrical system installations
How can I prevent budget overruns?
Develop detailed plans and use contracts that clearly specify materials.
A reliable contractor will provide a complete breakdown, including models, specifications, quantities, and installation costs (e.g., brand, model, unit price, installation fee).
This allows homeowners to review and adjust materials before construction begins, ensuring the project stays within budget.
Is construction insurance necessary?
It is not mandatory but highly recommended, as it protects against potential damage during construction.
If financing is obtained through a bank, insurance (such as fire insurance) is typically required and included in the loan.
What is the standard warranty period after construction?
Typically:
- Structural work: 5–10 years
- General work: 2–3 years
9 STRAIGHT
From Foundation to Finish — By Us
With over 20 years of experience in construction — from homes and factories to condominiums — we have consistently earned our clients’ trust through honesty and transparency in every project. We are the reliable choice when you’re ready to build your home.
- 20+ Years of Construction Experience
- Expert Engineers & Architects Ready to Advise
- Transparent. No Cost Overruns. No Abandoned Projects
Turnkey Construction Services Nationwide Homes, buildings, offices, condominiums, warehouses, and factories — delivered by a professional team you can trust.
