Service
House Extension Builders in London
Concept Design Builders Ltd helps homeowners across London plan and complete practical house extension projects, including rear extensions, side-return extensions, kitchen extensions and related internal finishing.
Project standard
Clear scope, coordinated trades and a tidy handover across renovation, extension, roofing and finishing work.
- Base
- North London
- Coverage
- 32 boroughs
- Quotes
- Written
- All London Boroughs
- Multi-Trade Building Services
- Itemised Written Quotations
- Real Project Gallery
- Public Review Profiles
- Company No. 12265012
What's Included
What this service includes.
- Rear extensions
- Side-return extensions
- Kitchen extensions
- Open-plan living spaces
- Structural alterations
- Brickwork
- Roofing coordination
- Internal finishing
- Tiling, plastering and decorating
Common Projects
Projects we typically help with.
- More living space for a growing family
- Larger kitchen and dining area
- Better ground-floor layout and flow
- Modernising a tired or dated property
Process
Our process for this service.
Selected Work
Relevant project examples.
Bathroom Renovation in London
A tired family bathroom replaced with a fresh, well-tiled walk-in shower space — including layout adjustments, new plumbing routes and a clean finish.
Period Home Renovation in Barnet
A tired period home in Barnet refurbished room by room, sympathetically restoring features and finishing to a clean, ready-to-move-in standard.
Help
Frequently asked questions.
Site Visit
Check coverage for your house extensions project.
Drop in your postcode to see answers tailored to your area — timelines, what's typical for your district, and a one-click request for a site visit.
Many smaller extensions fall under permitted development, but rules vary by property and area. We can help you understand whether your project is likely to need a planning application before you commit to a design.
Yes. We routinely handle plastering, painting, tiling, flooring and finishing carpentry as part of the same project so the new space is ready to use on completion.
Yes. We coordinate the trades typically needed on an extension — bricklayers, roofers, plasterers, electricians and plumbers — so you only need to deal with one point of contact.
Contact us with a short description of what you have in mind. We will arrange a site visit, talk through the options and provide a written quotation.
Continue Exploring
Related Services
Home Renovations
Whole-home and room-by-room renovations, including period property updates and modernising tired interiors.
Learn MoreKitchen & Bathroom Renovations
Full kitchen and bathroom renovations including tiling, carpentry, plumbing and electrical coordination.
Learn MoreGeneral Building Work
Repairs, property improvements and multi-trade jobs of all sizes — small jobs and larger projects.
Learn MoreGet In Touch
Planning a house extensions project?
Tell us about your project and we'll help you take the next step.