House Extensions in London
Haze Construction builds house extensions across London. Whether you’re extending to the side or adding space upstairs, we can review your plans, discuss the scope and prepare a quotation for your home.
Request a free quote or call 07939 276474.
Completed extension projects
Richmond Side Extension
We built a single-storey side extension in Richmond with a new entrance and rooflights that bring daylight into the space. Inside, timber flooring and fitted shelving around the opening connect the extension to the existing home.
St Albans Road Home Extension
A home extension that gave the homeowners more room within their existing property.
Bromley First-Floor Extension
A first-floor extension that added space upstairs. The project gallery shows the build in progress, including the scaffolded exterior.
More space, designed around your home
A well-planned extension can create room for family life, improve the layout and bring more natural light into your home. We undertake side, rear and upper-floor extension work, with the scope agreed around your property, plans and budget.
From plans to finished rooms
We begin by reviewing your drawings, access and priorities so that the quotation clearly describes the proposed work. Depending on the project, the scope can include structural alterations, roofing and rooflights, internal partitions, plumbing and electrical work, plastering, joinery, flooring and decoration.
Planning permission, building control requirements and any specialist design input should be established before work begins. We discuss responsibilities, sequencing and site access with you, including how the work will affect the parts of your home you continue to use.
Extension questions
How much will my extension cost?
The size, structure, access, specification and extent of internal alterations all affect the cost. Share your drawings and priorities with us for a quotation tailored to the work, rather than a generic price per square metre.
Can you work on an occupied home?
We discuss access, temporary disruption and which rooms will remain usable before agreeing the programme. Some stages may require alternative arrangements, depending on the work involved.
How long will construction take?
We agree a programme once the scope, approvals and key material lead times are understood, and keep you informed as the project progresses.
Considering improvements within your existing space? Explore our London home renovation service or browse our project portfolio.
Snagging, aftercare and warranty
Following completion, we carry out snagging, provide full aftercare and back our workmanship with a one-year warranty.