Superior House Extensions in Windsor.
In Windsor, where space is a royal premium, a well-designed extension is the ultimate way to stay in the town you love while gaining the modern square footage you need. Grand Innovations delivers extensions in Windsor that are designed to complement the area's prestigious riverside and historic aesthetic.
Request Your Free Cost Proposal
Tell us about your Windsor project. We respond within 24 hours with a clear, itemised proposal.
Specialist focus in Windsor.
We specialize in creating light-filled rear and side expansions that feature architectural glazing and high-end kitchen-diners. We handle every aspect from Royal Borough planning applications to the final decorative flourish, ensuring your new space adds both functional joy and significant value to your Windsor home.
As a premium 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 love to hear about it.
The Grand Standard
- Transparent weekly billing, no large deposits
- 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 Design Expertise
Designing expansions that maximize internal light and views of Windsor's unique historic and natural landscapes.
- 02
Architectural Symmetry
Using specialized materials and timber detailing to ensure your extension feels like an original Windsor feature.
- 03
Engineering Excellence
Precision engineering to open up your original Windsor floorplan safely and seamlessly for enhanced flow.
- 04
Elite Turnkey Management
Managing all trades and regulatory approvals under our signature weekly billing framework in Windsor.
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
Surveyed first, then itemised.
Every Windsor project begins with a free consultation and a fully itemised Cost Proposal, and with weekly billing you only ever pay for completed, signed-off work.
Transform 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.”