Build a new home in your garden in Kensington and Chelsea

Building a second home behind your own in Kensington and Chelsea is a construction project with one unusual feature: you live beside the site from the first spade to the last coat of paint. That shapes how we plan it, from the fence that separates your garden on day one to where deliveries park.

The route covers everything between an idea and a finished house. We survey and design, prepare and submit the planning application, arrange Building Regulations approval and the structural warranty, organise new water, drainage and electricity connections, and then build. You keep ownership of the land throughout.

Timber-frame house under construction with scaffolding at the bottom of a back garden, seen from the patio
Planning authority
Royal Borough of Kensington and Chelsea
Postcodes
SW3, SW5, SW7, SW10, W8
Noon sun, 21 March
About 38°
Shadow from a 5 m eaves line
About 6.3 m
Planning plan
Local Plan
County
Greater London

The local picture in Kensington and Chelsea

We cover gardens in Kensington and Chelsea and nearby places such as Hammersmith and Fulham, Westminster and Camden, with the same process wherever you are: a free desktop appraisal, a visit if the plot looks viable, then survey and design.

Some of those places may fall under a different council from the Royal Borough of Kensington and Chelsea, and each local planning authority has its own design guidance, validation list and pre-application service. We confirm which authority covers your address at the start, so the application is prepared for the right requirements first time and avoids delays at validation.

Section showing noon sun and shadows in Kensington and Chelsea: about 38 degrees on 21 March and 15 degrees on 21 December21 m21 Mar, noon: sun 38°, shadow 6.3 m21 Dec, noon: sun 15°, shadow 18.6 mExistingNew home
Noon sun in Kensington and Chelsea on 21 March sits about 38° above the horizon, so a typical two-storey eaves line (about 5 m) throws a shadow of roughly 6.3 m. In December the sun is only about 15° up and shadows stretch much further. Drawn for a garden facing north, where it matters most.

The next steps, locally

From appraisal to a decision from the Royal Borough of Kensington and Chelsea, each step in Kensington and Chelsea is agreed before it starts. After the site visit we quote for survey and design; after design we prepare the application; after permission we deal with conditions and technical approvals and give you a written build quote. Each stage is a separate decision for you, with its cost set out first.

  1. Free plot appraisal

    We check the title plan, access, constraints and planning policy from our desk, talk the plot through with you, and visit if it looks viable. There’s no cost and no obligation.

  2. Planning and approvals

    We submit the planning application and manage it to a decision, then deal with conditions, Building Regulations approval, the structural warranty, any build-over agreement and the new utility connections.

  3. Written quote and build

    Once design and survey are complete you get a written quote. The build runs in stages — access and groundworks, foundations, frame and roof, fit-out and external works — with inspections at each key point.

  4. Handover

    You receive the completion certificate, warranty documents, Energy Performance Certificate, manuals and utility details, so the new home is ready to move into, let or put on the market.

Worth checking early

  • A build next door means months of noise, deliveries and contractors near your home; good planning reduces the disruption but doesn’t remove it.
  • Building and selling a new home can change your tax position compared with selling only your house; take advice from a tax adviser first.
  • Planning can be refused, and money spent on surveys, design and the application isn’t recovered if it is — which is why we start with an appraisal.

Your questions, answered for Kensington and Chelsea

Do new homes in Kensington and Chelsea need a structural warranty?

If the house will ever be sold or mortgaged, in practice yes. Mortgage lenders usually expect a 10-year structural warranty on a new home, though some accept an architect’s or surveyor’s certificate, and a warranty provider inspects the work at stages during the build, so it has to be in place before construction starts. Building control approval is separate and also required; a buyer’s solicitor will ask for both.

How long does planning take for a new home in a Kensington and Chelsea garden?

The statutory period for deciding a minor application, such as a single new home, is 8 weeks from the date the council receives a valid application, in both England and Wales. In practice many applications take longer, and the council may ask you to agree an extension in writing. Surveys and design before submission add time, and conditions may need approving afterwards.

Who decides planning for a garden house in Kensington and Chelsea?

The Royal Borough of Kensington and Chelsea decides applications for addresses in Kensington and Chelsea, using the council’s Local Plan, national policy and its own design guidance. Neighbours and consultees such as highways officers can comment, and the decision is made by the council’s planning officers or, where the rules allow, its planning committee. Pre-application advice from the council can help test a scheme before the formal application is submitted.

Do you visit gardens in Kensington and Chelsea before giving advice?

We start with a desk review of the title plan, access, constraints and planning policy, then talk the plot through with you. If it looks viable, we arrange a site visit to see the access, levels, trees and neighbouring windows for ourselves. The appraisal is free and carries no obligation.

Other options in Kensington and Chelsea

Build in your garden near Kensington and Chelsea

Find out what your garden could become

Free garden plot appraisal. No cost, no obligation, and a straight answer if it won’t work.