Interior Design with
9 Straight
Interior design is where aesthetics meet functionality.
It’s not just about creating beautiful spaces — but enhancing comfort, safety, and expressing your identity in every detail.
At 9 Straight Construction, we design interiors that are both practical and visually refined, tailored to your lifestyle and space requirements.
More Than Design — We Care About Every Detail
At 9 Straight Construction, we take care of every step of your interior design journey — from space planning and layout to selecting high-quality materials and refining every detail of the finishing.
We create spaces that are not only visually appealing but also fully functional, ensuring your home or workspace truly supports your lifestyle.
- Tailored to your style — not generic templates
- Transparent budgeting with no hidden costs
- Professional design backed by real construction experience
- A perfect balance of aesthetics and usability
Why Invest in Interior Design
Investing in interior design is not just about aesthetics —
it’s about enhancing value and maximizing the potential of your property in multiple ways.
Increase Value & Appeal
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Well-designed interiors elevate both the visual appeal and market value of your home or workspace.
With the right materials, functional layout, and distinctive design, your space becomes more attractive, comfortable, and user-friendly.
Efficient Space Utilization
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Smart space planning is at the core of effective interior design.
From room zoning and furniture selection to natural lighting placement, every detail is designed to maximize usability and align with your lifestyle.
Reflect Your Lifestyle
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A home should be more than just a place to live — it should reflect who you are.
Thoughtful interior design helps express your personality and lifestyle through every element, from color tones and materials to furniture and decorative details.
Whether it’s modern elegance, minimal luxury, or a unique personalized style, every design choice creates a distinct atmosphere — making your space truly yours.
Stay on Trend
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Keeping up with interior design trends helps your home or workspace stay modern and relevant.
At 9 Straight Construction, we integrate contemporary design ideas with practical functionality, ensuring your space not only looks stylish but also adapts to evolving lifestyles.
From modern minimal to timeless designs, we offer a wide range of styles tailored to your needs.
Minimal Luxury And
Modern Loft
Minimal Luxury combines clean lines with refined elegance.
Using premium materials and soft, neutral tones, this style creates a space that feels open, calm, and sophisticated.
In contrast, Modern Loft emphasizes raw structures and materials, blending contemporary design with an industrial edge to create a bold and distinctive atmosphere.
Eco-friendly Interior
Eco-friendly interior design is becoming increasingly popular.
By using safe materials, recycled elements, and energy-efficient lighting systems, sustainable design helps reduce environmental impact while enhancing comfort and well-being in your space.
Why Choose 9 Straight Construction
Our team consists of experienced engineers and interior design specialists, delivering complete solutions with professional standards.
From design, planning, and material selection to construction — we manage every step of the process seamlessly.
We select high-quality, durable, and environmentally friendly materials to ensure long-lasting performance and reliability.
Every design is customized to match your needs, lifestyle, and unique identity — creating spaces that truly fit you.
We deliver projects on schedule with transparent pricing — no delays, no unexpected cost overruns.
At 9 Straight Construction, we provide complete interior design solutions tailored to every space — whether it’s your home, office, or lifestyle-driven environment.
From concept to completion, we ensure your project is delivered with quality, functionality, and design excellence.
A Home
That Reflects Who You Are
- Home System Planning & Installation
- Home Construction Services
- Structural Design Services
- Architectural Design Services
Our Interior Design Process with 9 Straight
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
Get in Touch with Us
Planning a construction or renovation project?
Our team is here to guide you every step of the way with professional advice you can trust.
