House Extensions in Windsor.
In Windsor, where space is at a premium, a well-designed extension is a practical way to stay in the town you love while gaining the space you need. Grand Innovations delivers extensions in Windsor that are designed to complement the area's riverside and historic character.
Read our house extension cost guideRequest Your Free Cost Proposal
Tell us about your Windsor project. We reply within 24 hours to arrange a free site visit, then send an itemised Cost Proposal.
Our focus in Windsor.
We specialise in creating light-filled rear and side expansions that feature large glazing and well-planned kitchen-diners. We handle every aspect from Royal Borough planning applications to the final decorative flourish, ensuring your new space works well for the way you live in your Windsor home.
As a design-and-build company we take on a limited number of projects at a time, so that every one gets the attention it deserves. If you are planning work on your Windsor home, we would like to hear about it.
The Grand Standard
- 10% deposit, then weekly billing for completed work
- One team from design to completion
- Planning & building control managed for you
Planning authority
Royal Borough of Windsor and Maidenhead
We handle applications, party wall agreements and building regulations on your behalf.
Local housing stock
Period townhouses · Victorian villas · cottages · luxury riverside estates
Also serving nearby
What we deliver in Windsor.
- 01
Riverside Extension Design
Designing extensions that make the most of daylight and garden views in Windsor homes.
- 02
Matching the Existing House
Matching brick, timber detailing and roof tiles so your extension looks like part of the original Windsor house.
- 03
Structural Engineering
Engineered steelwork to open up your original Windsor floorplan safely.
- 04
Project Management
Managing all trades and regulatory approvals in Windsor, with weekly billing for completed work.
Maidenhead Rear Extension & Kitchen
The Challenge
The brief was one bright, sociable kitchen-diner in place of a dark rear elevation, with the extension, kitchen, glazing, tiling, decoration and garden handled by a single team rather than a chain of separate trades.
Our Solution
We designed and built the project in-house: the extension structure, a full roof lantern at the centre of the new room, bifold doors onto a newly landscaped patio and a complete kitchen installation, carried by one team from first drawings to final decoration.
Your questions, answered.
Your Cost Proposal
Measured first, then itemised.
Every Windsor project begins with a free consultation and a fully itemised Cost Proposal. We take a 10% deposit three weeks before the start date, then bill weekly for completed, signed-off work.
Read our house extension cost guideTransform your Windsor home.
Tell us about your Windsor project and we'll arrange a free, no-obligation consultation, followed by a clear, itemised Cost Proposal, usually within 24 hours.
“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.”