House Extensions in Westerham.
Westerham is a market town of historic townhouses, period cottages and detached villas, set against the open country of the North Downs. A well-judged extension is often the best way to gain a kitchen-diner or family room without giving up the setting that brought you here.
Read our house extension cost guideRequest Your Free Cost Proposal
Tell us about your Westerham project. We reply within 24 hours to arrange a free site visit, then send an itemised Cost Proposal.
Our focus in Westerham.
Grand Innovations designs and builds house extensions in Westerham and the villages around it. We handle the drawings, the planning route and the build itself, with the care an older property deserves, so the new space reads as part of the house rather than something added to it.
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 Westerham 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
Sevenoaks District Council
We handle applications, party wall agreements and building regulations on your behalf.
Local housing stock
Historic townhouses · period cottages · detached villas
Also serving nearby
What we deliver in Westerham.
- 01
Rear & Side Extensions
Single-storey additions that open a cramped kitchen onto the garden, designed to sit comfortably with the brick, tile and proportions of the existing house.
- 02
Period Property Sensitivity
Matching brickwork, roof pitches and window details so an extension to an older Westerham home looks as though it belongs.
- 03
Planning & Design
Drawings, structural design and the planning route handled together, including any extra consents an older or protected property may need.
- 04
Kitchen-Diner Delivery
One team from foundations to the final kitchen installation, so there is a single point of contact throughout.
Greenwich Rear Extension & Kitchen
The Challenge
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.
Our Solution
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.
Your questions, answered.
Your Cost Proposal
Measured first, then itemised.
Every Westerham 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 Westerham home.
Tell us about your Westerham 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.”