Kitchen Extensions — Open-Plan Living for London Homes
A rear kitchen extension is the most popular single-storey extension type in London — and for good reason. It transforms the ground floor of a period terrace or semi-detached house, opening the kitchen to the garden, creating a bright, generous open-plan kitchen-diner-living space that becomes the heart of the home.
Prime Loft designs and builds kitchen extensions as a standalone service, and also as part of combined projects alongside loft conversions. A combined loft and kitchen extension is one of the most comprehensive home transformation projects available — adding space above and behind simultaneously, with a single project manager, single contract, and single fixed price.
What’s Included in a Prime Loft Kitchen Extension?
Kitchen units and appliances are typically client-supplied and fitted by our team — we coordinate directly with your kitchen supplier.
Kitchen Extensions — FAQs
A single-storey rear kitchen extension in London typically costs £40,000–£75,000 fully inclusive, depending on size, specification, and the glazing package. All Prime Loft prices are fixed.
Single-storey rear extensions up to 4m (detached) or 3m (semi/terrace) qualify under Permitted Development in most London properties. Larger extensions and those in conservation areas require full planning permission.
Yes. Prime Loft carries out combined loft and extension projects as a single fixed-price package, with one project manager and one programme. This is often more cost-effective than two separate projects.
A typical single-storey rear extension takes 6–10 weeks on site. Combined with a loft conversion, the total programme is typically 10–16 weeks.
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