Kitchen, utility & rear extensions
Roof Extensions
Roof extensions for kitchens, utility areas and rear yards — designed to blend with the house, built on a solid structure that adds real usable space.
A roof extension adds usable space to your home by extending the roof over a rear kitchen, laundry and utility area, back yard or multipurpose zone, so the space stays usable rain or shine. NexSteel Solutions builds rear-of-house extensions and designs roof extensions that blend with your existing home — mono-pitch, flat or gable — with roofing chosen for the job, such as metal sheet, insulated metal sheet, polycarbonate and vinyl. Structures are built strong on galvanised or anti-rust steel box frames suited to the hot, humid, rainy weather of Samut Prakan and Chonburi. Our crew handles the whole rear-extension project end to end, from measurement and design to installation and a clean finish, making every square metre of new space count.
What a roof extension can be used for
Popular uses include a rear Thai kitchen, a laundry and drying area, covered parking, a sitting area or storage. It keeps sun and rain off so you can use the back of the house year-round — ideal for detached homes, townhouses and shophouses needing more space.
Advantages and materials
Galvanised or anti-rust steel box frames are strong and corrosion-resistant. Roofing is matched to use: PU-insulated metal sheet cuts heat and rain noise, great for kitchens, while polycarbonate lets light into a laundry yard. We match colour and shape to the existing house.
Our installation process
We start with a free on-site measurement and consultation, inspect the existing structure to design safe fixing points, then quote clearly. We pour footings, erect the steel frame, fit the roofing and gutters, seal joints against leaks, and check strength before handover, backed by a warranty.
What affects the price
Price depends on the extension area, roofing material, roof shape, steel size and gauge, height, how it ties into the existing structure, and site complexity. We quote transparently against the real site, confirm everything up front, and keep it free of hidden costs.
Pricing & terms
Starting prices and job terms
1,190–5,500 THB / m²
Depends on work type, material grade, working height and structural complexity.
From 30,000 THB
Quoted per site — send dimensions or photos for an initial estimate.
From 7 days
Exact schedule confirmed after the site survey.
1–2 years
Duration and scope stated per work type in the quotation / contract.
Staged against progress
Deposit and instalment split stated clearly in the quotation.
- Premium grade (SCG)
- Standard grade (VG)
- General / imported grade
FAQ
Frequently asked questions
Does a rear extension need a permit?
Some extension sizes require notification or a permit under local by-laws. We give initial guidance and design to safe structural standards.
Will a roof extension tied to the house sag or leak?
We design separate load-bearing posts and seal joints properly to minimise sagging and leaks over the long term.
Which roofing is best for a kitchen extension?
We recommend PU-insulated metal sheet because it reduces heat and rain noise, keeping the kitchen cooler and more comfortable.
How long does a rear extension take?
A typical extension takes from a few days to about a week depending on size and site. We state it clearly in the quote.
Which areas do you serve?
Samut Prakan, Chonburi and nearby areas, with free on-site measurement and quoting.
Articles & Guides
Guides in this topic
In-depth articles tied directly to this service — worth reading before you decide.
Which Roof Extension Is Best? Six Popular Types Compared
Front, rear and side roof extensions compared — plus the structural separation rule that prevents cracking.
Read more
Roof Extension Materials — Metal Sheet, Vinyl, Polycarbonate or Acrylic?
Heat, rain noise, lifespan and relative cost compared across the roofing materials used on Thai extensions.
Read more Roof Extensions: Front, Rear & Side — Which Is Best
Plan a roof or home extension — heat-cutting roofing materials, shapes, setback rules and budgeting.
Read more
Contact Us
Ready to start your project?
Send photos and dimensions for a free initial estimate, or book a site survey in Samut Prakan / Chonburi.
Mon–Sat 08:00–18:00 (closed Sundays and public holidays)
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