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J.LEO glazed rear extension opening onto the garden

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House Extensions

More space, better light and a home shaped around the way you live.

Discuss Your ProjectView Our Work

We possess years of experience in handling home extensions in New Malden and Surrounding Areas of London

Call 07414 780 731 for a free, no-obligation quote

Honesty

Our Core Values: Embracing Excellence, Honesty, and Quality

Exceptionally Talented and Personable Team

Elevating projects with expertise and a friendly approach.

New Malden

Your trusted service provider for New Malden and surrounding London areas.

FREE no-obligation quotation

No-obligation quotation for your project.

An extension shaped around your home

Improve daylight, circulation and the connection to your garden. Explore the right type of extension, then choose the support you need.

Planning & Technical · Interior Design · Construction

Bring these services together through Design & Build

Single Storey Extension

Single storey extensions

Open up your ground floor with more space for cooking, dining and everyday living.

Single Storey Extension

Wraparound extensions

Connect side and rear additions to create a more generous, integrated ground-floor layout.

Single Storey Extension

Double storey extensions

Create additional space across two floors, with a design that respects the proportions of your home.

Single Storey Extension

Porches & entrances

Make arrival more practical and welcoming with a carefully considered entrance.

From first ideas to a finished extension

Choose the stages you need. We agree the scope of our appointment before work begins.

01 · Brief & feasibility

We discuss how you want to live, your property and budget, then explore the options for extending your home.

02 · Design & planning

We develop the layout and drawings, and support the planning application where required.

03 · Technical detail & preparation

We coordinate the agreed technical information, specialist input and construction scope so the next steps are clear.

04 · Build & handover

If you appoint us to build, we coordinate construction and the agreed interior design support through to handover.

What will the process be?

CONSTRUCTION

INTERIOR

DESIGN

COUNCIL

PAPERWORK

PLANNING

CONSULTING

Selected projects

Explore homes and spaces from the J.LEO portfolio.

View the full portfolio ↗

Let’s talk about your extension

Based in New Malden, we work with homeowners across London and the surrounding areas. Tell us about your property, ideas and the support you need.

Discuss your project ↗   Book a call ↗

Customer Locations

New Malden

Teddington

Twickenham

Richmond

Kingston

Surbiton

Wimbledon

Weybridge

Brixton
Kensington
Westminster
Barnet
Watford
Croydon
Greenwich
London

Client Testimonial

Had an issue with a leaking pipe in our kitchen, they were very transparent with the quote to replace the entire floor (85sqm), which included moving a large island.  We also got them to add a large soakaway and repoint the paving in the garden.  Happy with the work and would highly recommend!

From JR.

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