Planning a house extension usually involves more than simply finding a builder.

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Depending on the size and complexity of the project, you may need support from structural engineers, Building Control professionals or approved inspectors, party wall surveyors, asbestos surveyors, builders, shell-build contractors, steel fabricators, scaffolding companies, skip-hire providers, window and door suppliers, kitchen companies, bathroom specialists and other trades.

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Some homeowners choose to appoint one main contractor to manage the entire project. This is often the simplest and quickest route, but it can also be the most expensive, as the builder may add a margin to labour, materials, subcontractors and specialist services.

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Another option is to appoint a builder for the main shell and obtain separate quotations for selected parts of the work, such as skips, scaffolding, steels, windows, doors, kitchens, bathrooms, electrics, plumbing, heating, plastering, tiling, flooring and decorating. This can help reduce costs and give homeowners more control over the specification, although it usually requires a little more organisation.

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Where appropriate, we may introduce you to selected independent providers from the Architectural Partner Network (APN). APN is a vetted network of building, property and home-improvement specialists who can provide quotations for the services you select. There is no obligation to proceed with any provider.

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Use the form below to tell us which house extension services you are interested in. APN may arrange introductions in stages, starting with the services most relevant to your current project stage.