A house extension adds space without the cost and disruption of moving — and in Maidenhead’s property market, where the gap between a three and four-bedroom home can represent tens of thousands of pounds, it is an investment that consistently pays back. The question most homeowners face is not whether to extend but how to do it correctly and who to trust with a project of this size.
We manage house extensions of all types across Maidenhead and the surrounding Royal Borough — single storey rear, double storey, side return and wrap-around. Structural design, planning applications, building regulations, trade coordination and the full internal fit-out, managed as a single project from groundwork to handover.
Maidenhead’s housing stock creates a varied picture for extension work. The Victorian and Edwardian terraces near the station and the town centre suit side return and wrap-around projects that widen the kitchen and open up the ground floor. The inter-war semis of Furze Platt, Cox Green and Boyn Hill are well suited to single storey rear extensions. The larger detached properties of Cookham, Bray and Taplow call for double storey additions and higher-specification glazing and internal finishes. We know what each property type typically needs and price accordingly. Get in touch to discuss yours.
The most common extension type across Maidenhead — and the one that most consistently transforms how a post-war semi functions. For the inter-war and post-war properties of Furze Platt, Cox Green and Boyn Hill, a rear extension combined with an open-plan ground floor conversion creates a kitchen and living space the original layout could never provide. We manage the full scope: foundations, structural frame, roof, glazing, services and internal fit-out from groundwork to handover. Full-width bi-fold or sliding glazing is the standard expectation across the Maidenhead market. Roof lanterns, underfloor heating and connections to kitchen extensions are managed as part of the project, not as separate contracts.
A double storey addition costs more but delivers considerably more floor area than a single storey of equivalent ground floor footprint. For families in the larger detached properties of Cookham, Taplow and Bray who need both additional living space and an extra bedroom, it offers the best return per pound of any extension type. We manage the full scope across both floors — structural frame, roof, external envelope, upper floor plumbing, electrics throughout and all building regulations sign-off. Party wall agreements are more commonly required on double storey work and we manage this process as a standard part of the pre-build programme.
Side return extensions fill the narrow passage alongside Victorian and Edwardian terraces — widening the kitchen and improving the ground floor layout without needing any additional garden depth. The structural work is less extensive than a full rear extension but the confined working conditions and almost universal party wall requirements add to the programme. A wrap-around combines rear extension with side return to create an L-shaped addition across the full ground floor — the most transformative single storey option available. The roof junction between the two elements requires careful structural design. For the terraced and semi-detached properties of the town centre and the older Maidenhead streets, this is the most consistently requested structural project we carry out.
Most single storey rear extensions on Maidenhead’s semi-detached and detached properties fall within permitted development — no planning application required, provided the extension meets size and siting criteria. The standard PD depth for semis and terraces is 3 metres from the rear wall, extendable to 6 metres through the larger home extension scheme via prior approval with the Royal Borough of Windsor and Maidenhead. Double storey extensions and wrap-arounds more commonly need a full planning application. For properties in the conservation areas of Cookham, Bray and the Thames-side parishes, permitted development rights are more restricted — we establish the planning position for your specific property at the outset and manage any application as part of the project.
We manage the full extension scope — structural, services, glazing, internal fit-out — as a single project with one point of contact accountable for the outcome. You are not coordinating a structural engineer, a groundworker and a builder separately and hoping they work in the right order.
We give fixed prices based on what the project actually involves. Maidenhead’s clay subsoil in lower-lying areas towards the Thames can require more considered foundation design than straightforward chalk or gravel ground — we assess ground conditions before finalising design rather than discovering the issue once excavation starts.
We are fully insured and manage building regulations, party wall agreements and planning applications as standard.
Maidenhead town — Furze Platt, Cox Green, Boyn Hill, Woodlands Park, Braywick, Pinkneys Green
Thames villages — Cookham, Bray, Taplow, Bourne End, Hurley, Maidenhead Riverside
Windsor corridor — Windsor, Eton, Clewer, Old Windsor, Datchet, Wraysbury
Marlow and surrounds — Marlow, Little Marlow, Bisham, Medmenham, Hurley
For Maidenhead homeowners who need dedicated workspace or leisure space without extending the main house, a well-built garden room is an increasingly practical option. We build permanent, fully insulated garden rooms across the Royal Borough — foundations, structure, cladding, glazing and electrics managed as a complete project. Most fall within permitted development. In the conservation areas of Cookham, Bray and the Thames parishes we advise on the planning position before design begins.
An extension adds space outward — a loft conversion adds it upward, without touching the garden or the footprint. For Maidenhead properties where the garden is too small for a rear extension, or where planning constraints limit what can be added at ground level, a loft conversion is often the most practical route. We carry out dormer, rooflight and hip-to-gable conversions across the Royal Borough, with en-suite designed and plumbed at the structural stage. Most rear dormers on Maidenhead semis fall within permitted development.
A rear extension is frequently the trigger for a wider ground floor reconfiguration — opening up the wall between the existing kitchen and the new extension, replanning the whole ground floor around the new footprint, and upgrading the kitchen and electrical installation at the same time. We manage this as a single coordinated scope rather than a series of separate jobs. For Maidenhead homeowners planning both an extension and a renovation, combining the scopes saves time, reduces disruption and gives a better-sequenced finished result.
Planning an extension in Maidenhead? Get in touch for a clear, honest price from a local building team.