Extend into your garden to create the open-plan kitchen, dining and family space your home is missing. In-house architects, structural engineers and build teams deliver your rear extension end to end across North West London.
A rear extension projects outward from the back wall of your house into the garden. It is the most direct way to enlarge a kitchen, create an open-plan living area, or add a ground-floor utility or family room. Single-storey rear extensions suit most terraced, semi-detached and detached houses; a double-storey rear extension adds a bedroom or bathroom above. We handle design, planning, structural engineering, party wall and construction under a single contract.
The most popular use of a rear extension is to merge the kitchen, dining and family space into one bright, garden-facing room, often with bi-fold or sliding doors and a roof lantern.
Many single-storey rear extensions can be built under Permitted Development rights without a full planning application — we assess this for every property before you commit.
Add space on the ground floor alone, or build a two-storey rear extension to gain an extra bedroom or bathroom above the new kitchen or living room.
Removing the original rear wall needs steel beams, padstones and often new foundations. Our in-house structural engineer designs and certifies every element.
Where work affects a shared boundary or requires excavation near a neighbour, we coordinate the Party Wall etc. Act 1996 notices and surveyors on your behalf.
A well-designed rear extension adds usable square footage and is consistently one of the most sought-after features for buyers in the North London market.
Programmes vary with size, ground conditions, glazing and kitchen specification. The figures below are indicative on-site durations; we issue a detailed programme and a fixed, itemised quotation after a site survey.
| Project Type | Indicative Timeline (on site) | Typical Scope |
|---|---|---|
| Small single-storey rear | 10–14 weeks | Structure, roof, glazing, finishes |
| Large single-storey / open-plan | 14–20 weeks | Extension plus new kitchen and knock-through |
| Double (two-storey) rear | 18–26 weeks | Ground + first floor, new room above |
| Rear extension + internal remodel | 20–30 weeks | Extension with wider ground-floor reconfiguration |
Every project is priced individually. Use our cost calculator or book a free consultation for a detailed, fixed quotation.
An architect visits, measures the rear of your property, reviews the structure and discusses your brief and budget — no obligation.
We produce drawings and 3D visuals, then submit either a Lawful Development Certificate (for Permitted Development) or a full householder planning application, whichever your property requires.
Our structural engineer designs the steelwork and foundations and we obtain Building Regulations approval, liaising with the inspector throughout.
We serve any required party wall notices, then our directly-employed build team carries out groundworks, structure, roofing, glazing and finishes under a dedicated project manager.
We install the kitchen, joinery, flooring and decoration, then hand over with your Building Regulations Completion Certificate and 10-year structural warranty.
We are adding photographed, costed case studies for this service. To see comparable completed schemes, book a consultation or browse our case study portfolio.
Book a free, no-obligation consultation. Our architects will visit, assess what is achievable on your property, and provide a transparent, fixed quotation.