House Extensions
Thames Valley
Single-storey, double-storey and wraparound extensions across the Thames Valley. Fixed-price quotes. Adds 10–15% to property value.
Extension Types
What We Build
Single-Storey
Rear, side and wraparound extensions. Open-plan kitchen-dining-living spaces. Bifold doors, roof lanterns, full glazing.
From £35,000
Double-Storey
Maximise space above and below. Bedroom and bathroom above, extended living below. Outstanding value in Berkshire.
From £65,000
Side-Return
Transform the narrow passage beside terraced and semi-detached homes into a full-width kitchen space.
From £30,000
What’s Included
Full Service, Fixed Price
- Free site visit and feasibility assessment
- Planning application coordination and support
- Structural design and building regulations submission
- Foundations, groundworks and structural works
- Brickwork, blockwork, roofing and weatherproofing
- Windows, doors and glazing supply and installation
- First and second fix electrics and plumbing
- Plastering, flooring, joinery and decoration
- Building regulations sign-off and certification
- Weekly photo progress reports throughout
FAQs
Extension Questions
Do I need planning permission for a house extension?+
Many extensions fall under permitted development rights and do not require planning permission. Single-storey rear extensions up to 4 metres (detached) or 3 metres (semi/terraced) typically do not need planning. We assess permitted development rights at the initial site visit.
How long does a house extension take?+
A single-storey extension typically takes 10–14 weeks from groundworks to completion. Double-storey extensions run 16–22 weeks.
How much does a house extension add to property value?+
In Berkshire, a well-executed single-storey extension typically adds 10–12% to property value. A double-storey extension adds 15–20%.
What is a fixed-price quote?+
Our quotes cover all labour and materials to practical completion. The price is locked at the point of agreement. No hidden costs, no surprises.
Do you manage the planning application?+
Yes. We coordinate with your architect and submit planning applications on your behalf. We can also recommend trusted local planning consultants.
Get Started
Free Extension Quote
Free Extension Quote
Within 48 Hours
Free site visit. Fixed-price quote within 48 hours. No obligation.