Home Extensions
in London
Create the space your home needs without the disruption of moving. AJ Contractors Builder plans and builds home extensions in London, including rear, side return, wraparound and double storey extensions tailored to your property and the way you want to live.
-
Fully
Insured -
Experienced London
builders -
Building control
compliant -
Quality
Workmanship
- Fully Insured
- Building Control Compliant
- Experienced Extension Builders
- Quality Workmanship
Home Extensions Designed Around Modern Living

Our home extension builders in London create practical new space that feels like part of the original property. We deliver rear, side return, wraparound and double storey extensions for kitchens, dining areas, living rooms, bedrooms and home offices.
From the initial site visit and agreed scope of work through to structural construction and the final finish, we keep the project organised and communication clear.

Why Invest in a Home Extension?
A home extension is one of the most effective ways to create more living space, improve your layout and add long-term value without needing to move home.
Designed Around Your Lifestyle
Every home extension is planned around your property, family needs and the way you want to use the new space.
Improved Flow Through Your Home
Create a larger kitchen, open-plan dining area, extra living room or practical family space that works better every day.
Adds Long-Term Value
A professionally built home extension can improve comfort, increase usable space and add lasting value to your London property.
Home Extensions London: What We Build
Our home extension services help London homeowners gain useful living space, improve awkward layouts and make better use of their property. We coordinate the building work from preparation and groundworks through to the finishing stages.
Rear Extensions
Create larger kitchens, dining areas and family spaces with a professionally built rear extension designed around your home.
Side Return Extensions
Make better use of unused side space and improve the flow of your property with a practical side return extension.
Double Storey Extensions
Add valuable ground floor and first floor living space while increasing the long-term value and practicality of your property.
Wraparound Extensions
Combine rear and side return space to create a larger open-plan kitchen, dining area or family room with a layout designed around your home.
Our Home Extension Process
We manage each home extension through clear stages, keeping you informed from the first consultation and preparation through to construction, finishing and handover.
1. Consultation
We discuss your ideas, property, budget and the type of extension you want to create.
2. Planning and Preparation
We review the proposed layout, structural requirements, materials and any planning or Building Regulations considerations before the build begins.
3. Construction
Our team carries out the groundworks, structure, brickwork, roofing and required installations while keeping the site organised and progress clear.
4. Completion
We complete the finishing details and hand over your new extension ready to use.
Why Homeowners Choose AJ Contractors Builder
Choose experienced home extension builders in London for clear quotations, straightforward communication and a carefully managed build from the first visit to completion.
Experienced Extension Specialists
We build rear extensions, side return extensions and double storey extensions designed around your property and lifestyle.
Transparent Pricing
We provide clear quotations and detailed project information so you understand what is included before work begins.
Built to Last
Quality materials, skilled workmanship and attention to detail help ensure your extension performs well for years to come.
Managed From Start To Finish
From consultation and preparation through to construction and completion, we keep your project organised and on track.
Home Extension Project Gallery
Explore some of our completed home extension projects across London, including rear extensions, side return extensions and double storey extensions designed to create more space, improve layouts and add long-term value.

Contemporary Rear Extension
A professionally built rear extension creating a larger kitchen, dining and family living space with modern glazing and improved natural light.

Modern Side Return Extension
Unused side space transformed into a practical extension that improves flow, increases usable floor space and enhances everyday living.

Double Storey Home Extension
A double storey extension can provide additional ground-floor living space and extra first-floor accommodation, helping the whole property work better.
See more completed home extension work across London in our dedicated project gallery.
Home Extension Services Across London
AJ Contractors Builder provides home extension services across London and nearby areas, helping homeowners create more space with rear extensions, side return extensions and double storey extensions built to a high standard.
Not sure if we cover your area? Contact us and we will confirm quickly.
Not sure if we cover your area? Contact us and we will confirm quickly.
Home Extension FAQs
These are some of the most common questions homeowners ask before starting a home extension project in London.
Planning a home extension?
Home extension projects often involve planning, layout changes, structural work and careful finishing. These FAQs answer common questions homeowners ask before starting an extension in London.
The timescale depends on the extension size, structural work, access, specification and approvals required. We can provide a clearer programme after reviewing the property, drawings and agreed scope of work.
Some home extensions may fall within permitted development rights, while others require planning permission. The position depends on the property, location and proposed size, so the requirements should be checked before work begins. For general information, read the Planning Portal guidance for extensions.
Most home extensions must comply with Building Regulations. The exact requirements depend on the design and work involved, including the structure, insulation, fire safety, drainage and electrical installations.
Yes. We can coordinate the agreed building work from preparation and construction through to plastering, finishing and final handover.
A well-planned extension can add useful living space and may improve the value and appeal of your property. The result depends on the design, build quality, location and how well the new space works with the existing home.
Planning a Home Extension in London?
Whether you are considering a rear, side return, wraparound or double storey extension, speak with AJ Contractors Builder about your plans and request a free, no-obligation quotation.
- Free Quotes
- Fully Insured
- London Based
- Quality Workmanship