S.T. Contracts house extension services in Watford

5-Star Rated on Google

House Extensions in Watford

Home extensions done properly. S.T Contracts Ltd specialises in single and double storey extensions, rear builds, side returns and wrap-arounds, offering a personalised service, clear communication and full project management from start to finish.

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24+ Years Experience

5★ Google Reviews

FMB Member

Why Customers Choose S.T. Contracts

S.T Contracts Ltd has over two decades of experience delivering home extensions for terraced, semi-detached and detached houses. We serve Watford and surrounding Hertfordshire towns, managing everything from planning and permissions to construction and finishing.

Free 3D Designs

See your extension before we build it. Visualise layouts, finishes and how it connects to your home.

Planning Handled

We manage planning applications and building regs. You don't deal with the council.

One Point of Contact

Deal with us directly throughout your extension. No chasing, no confusion.

Quality Guaranteed

FMB and Guild of Master Craftsmen members with a six-month workmanship guarantee.

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How S.T. Contracts Works

Every house extension follows a clear process. Whether it's a rear kitchen extension or a wrap around house extension, you know what's happening at each stage.

Site Visit

We discuss what you want and assess the property

3D Design

Free visuals so you see your extension before we build

Build Phase

Planning and building regs handled with daily clean-up

Handover

Final walkthrough and snagging before you sign off

Discuss Your Project

S.T. Contracts house extension construction in Watford

Rated 5 stars by homeowners across Hertfordshire

House Extension Ideas

More space without moving house. See more of our extensions on Instagram.

Popular

Rear Kitchen Extension

More space for cooking and dining

Modern

Modern Single Storey Extension

Natural light and garden views

Side

Side Return Extension

Use that wasted side space

Wrap Around

Wrap Around Extension

Rear and side combined

Two Storey

Double Storey Extension

Maximum additional space

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How Long Will My Extension Take?

Every house extension is different. Here's a rough guide to help you plan.

Planning Application

8-12 weeks

Side Return Extension

6-8 weeks

Rear Single Storey Extension

8-12 weeks

Wrap Around Extension

10-14 weeks

Double Storey Extension

12-16 weeks

Double Storey Rear Extension

16-20 weeks

Timescales depend on size, complexity and planning requirements. Get in touch for an accurate timeline for your house extension.

House Extension FAQs

Common questions about building a house extension with S.T. Contracts.

Do house extensions need planning permission?

It depends on size and position. Many rear single storey extensions and side single storey extensions fall under permitted development. S.T. Contracts assesses your situation and handles any applications needed.

Can I stay in my home during the extension build?

Yes, most customers stay in their homes throughout. We plan work to minimise disruption, keep access to essential rooms, and clean up daily.

Will a house extension add value to my home?

Yes. A well-designed extension typically adds more value than it costs, especially in Watford and St Albans where space is at a premium.

Do you build extensions on terraced and semi detached houses?

Yes. S.T. Contracts builds terraced house rear extensions, semi detached rear extensions and victorian side return extensions. We work on all property types including detached homes.

Where do you build house extensions?

S.T. Contracts is based in Watford. We build house extensions across St Albans, Radlett, Chorleywood, Harpenden and surrounding areas within a 20 mile radius.

What about Party Wall agreements for extensions?

If your extension is near a boundary, you may need a Party Wall agreement with your neighbour. This is common for terraced house side return extensions and semi detached house extensions. We advise on requirements and can recommend surveyors if needed.

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07778 807557