
House Extension & Rear.
Single-storey, double-storey, side-return or wrap-around — we design and build light-flooded extensions that completely change how your home feels and lives.
- Crittall-style steel doors & frameless glazing
- Roof lanterns, flush skylights & vaulted ceilings
- Steel beams, underfloor heating, polished concrete or oak
- Permitted-development & full planning routes handled
- Seamless connection to existing kitchen/living spaces




Our process.
Brief & Survey
We measure, photograph and discuss how you actually use the space.
Architect Pack
Drawings, structural calcs, planning & party-wall in one package.
Build
Foundations to finishes — 10–16 week typical build.
Handover
All certificates, 10-yr structural warranty, aftercare visit at 6 months.
Questions.
Do I need planning permission for a rear extension in Berkshire?+
Most single-storey rear extensions in Reading, Slough, Wokingham and the Royal Borough fall under permitted development — up to 6m on detached properties and 4m on semis / terraces, subject to the prior-approval neighbour-consultation scheme. Wrap-around, two-storey and conservation-area extensions (Henley, Marlow, Old Windsor) require a full planning application. We confirm the route, submit the drawings and manage the council on your behalf in your fixed quote.
How much does a rear extension cost?+
Every SIB extension is bespoke — Crittall glazing, roof lanterns, structural steels, polished-concrete or engineered-oak floors, kitchen integration and finishing are all specified to your home. We do not publish per-square-metre prices because real costs depend on access, ground conditions, glazing spec and finish. Book a free site visit — Guri will deliver a fixed-price quote within days.
Can you match my existing brickwork?+
Yes — we source reclaimed Victorian and Edwardian stock bricks from approved UK yards and blend bespoke mortar mixes on site to match colour, joint and weathering. For 1930s semis we hand-pick London Yellow and red multi blends; for modern homes we deliver flush-blended buff or charcoal facing brick to match the existing elevation seamlessly.
How long does a rear extension take to build?+
A standard 25–35 m² single-storey rear extension with kitchen integration runs 10–16 weeks from foundation strike to handover, including roof, glazing, plastering, electrics, plumbing, flooring and decoration. Larger wrap-around or double-storey builds typically run 16–22 weeks. You receive a dated programme in your fixed quote so you can plan around the works.
Do you build double-storey and wrap-around extensions?+
Yes — double-storey rears, side returns, wrap-arounds and Juliet-balcony extensions are a significant part of our portfolio across Berkshire and west London. Each requires full planning, party-wall agreements and structural engineering, all of which we handle in-house as part of your single SIB contract.
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Your home has more
potential than you think.
Book your free consultation today. We'll visit, survey and send back a clear plan with realistic figures within 48 hours. No pushy sales, ever.



