Can we live in the house while you extend and renovate?

In most cases, yes. We phase the work so that the extension shell is built and weathertight before the rear wall is opened, and we keep a working or temporary kitchen for as long as possible. Where a full renovation makes the house genuinely unliveable for a period, we tell you that at the outset and set out how long it will last.

Do I need planning permission for an extension in Reigate?

It depends on the size and position of the extension, the type of house and where it is. Some rear extensions fall within permitted development, but permission may be required if the property is in a conservation area, is listed, or has had its permitted development rights removed. We confirm the position with Reigate and Banstead Borough Council before any design work is committed.

How long does an extension with a renovation take?

A single-storey rear extension on its own typically takes ten to fourteen weeks from foundation to completion. Combined with a wider renovation of the ground floor, expect longer, depending on how much of the house is involved. We set out the programme week by week before work starts, so you know which rooms are affected and when.

How much will it cost?

An extension combined with a renovation varies more than almost any other project, because the condition of the existing house is part of the price. Rather than publish a range that may not fit your home, we visit, look properly at both the extension and the house it joins, and put an itemised figure in writing. Our published extension cost guide explains where the money goes.

Design and build · Surrey

House Extensions
in Reigate

House extensions in Reigate, designed and built by one team from our base in New Haw, about 15 miles away.

Get a free Cost Proposal 01932 950158

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Our workExtension, kitchen & bathroom, Greenwich, London

10 to 14 weeks
to build a single-storey rear extension
Reigate and Banstead
Borough Council decides planning
Typical homes
Period townhouses
15 miles
from our base in New Haw

Building in Reigate

What shapes an extension here

House extensions in Reigate

In Reigate, an extension is rarely the only thing a house needs. Much of the town's housing is Victorian, Edwardian or inter-war, and by the time a family decides to add space, the kitchen is tired, the wiring dates from an earlier refurbishment and the ground floor is divided in a way that no longer suits how anyone lives. The question we are most often asked here is not how to extend, but whether to extend and renovate at the same time.

Usually the answer is yes, and it is less disruptive to plan both together than to do them years apart. The steelwork that opens the back of the house, the new drainage runs and the rewiring for a larger kitchen are all easier to install while the rear wall is open than after the new room has been plastered and decorated. We plan the extension and the renovation as one programme, sequenced so that the parts of the house you are living in are disturbed for as short a time as possible.

What we build

House extensions we design and build

House extensions

One Programme, Not Two Projects
Extension, structural alterations, kitchen, services and finishes are planned and priced as a single piece of work. Trades are sequenced so nothing is installed only to be disturbed a month later, and you deal with one team from the first visit to handover.
Period and Inter-War Houses
Older Reigate houses often have solid walls, suspended timber floors and ceiling heights that differ from room to room. Joining a new structure to that fabric properly, with matched floor levels, compatible materials and damp-proofing that meets the old walls correctly, is where an extension succeeds or quietly fails.
Sloping Plots Below the Downs
Reigate sits at the foot of the North Downs and many gardens rise or fall away from the back of the house. A change in level can mean retaining walls, deeper foundations or steps down to the garden, and it is far better to establish this on the first visit than to discover it once excavation has begun.
Planning & Conservation
Parts of Reigate fall within conservation areas, where permitted development rights may be restricted and a more considered design is generally expected. We establish the position for your address with Reigate and Banstead Borough Council before design work begins, and manage the application and building control process throughout.

Our nearest finished extension

Greenwich Rear Extension & Kitchen

Greenwich, London · about 19 miles from Reigate

The brief

Opening the rear of a 1930s semi into one room meant removing a load-bearing wall between the existing kitchen and the new extension, on a site where a narrow side passage was the only route for materials in and spoil out. The new ground-floor shower room also had to be formed within the existing rear lobby, well away from the original layout's plumbing.

What we built

The structural opening was formed with a steel beam cased into a shallow flush bulkhead that follows the line of the removed wall, keeping the ceiling clean and the sightline from kitchen to garden completely open. Deliveries were sequenced in small daily loads through the side passage to keep the neighbouring boundary clear, and services for the new shower room were routed within the extension's floor build-up so no boxing-in was needed in the finished rooms.

View this project

Extension FAQs

Questions we get asked here

Straight answers on house extensions in Reigate.

If the house needs it, usually yes. Structural steels, new drainage, rewiring and replacement heating are all simpler to install while the rear of the house is open, and doing them later means disturbing finished rooms. Planning both as one programme also means one period of disruption rather than two.

Free Cost Proposal

Planning an extension in Reigate?

Tell us about the project. We'll arrange a free site visit, then send a clear, itemised Cost Proposal.

10% deposit, due three weeks before the start date
Weekly billing for completed, signed-off work
One team from first drawings to completion

Rather talk it through? 01932 950158

“The attention to detail and absolute financial transparency provided by Grand Innovations completely redefined our expectations of what a home renovation could be. High standard of work, the extension is beautiful and has added so much value onto our home. Really appreciated the weekly billing, rather than a big amount upfront.”

Adrienne C. · Home extension