House Extensions in Stanmore
RCB Design & Build | A2Z Principal Contractors works across Stanmore and the HA7 postcode, delivering loft conversions, rear extensions, full house refurbishments, and structural alteration works for homeowners throughout the area. Stanmore is characterised by substantial detached and semi-detached properties, many from the interwar period, with generous plot sizes and roof spaces that offer excellent potential for loft conversion and extension. The property values in Stanmore support high-quali
House Extensions in Stanmore — what to expect
With generous rear gardens typical of Stanmore's detached stock, rear extensions can achieve substantial depth without compromising external amenity. We manage single and double-storey rear extensions from planning to decoration.
Stanmore property types
Period and interwar houses. The property type affects which extensions approach works best — we'll advise from the first call.
Common extensions projects we deliver in Stanmore
How we deliver extensions in Stanmore
Free consultation & survey
We visit your Stanmore property, assess what's possible, and give you a fixed-price indication before you commit to anything. No obligation.
Design & planning support
We work alongside your architect or our preferred design partners to develop drawings that are buildable, compliant, and cost-effective. We flag planning and permitted development options early.
Fixed-price contract
You receive a detailed, itemised scope of works and a fixed price before we start. No surprises mid-project. Variations are agreed in writing before any additional work begins.
Managed delivery
We manage all trades, procurement, and site logistics. You have a single point of contact throughout. Our site teams are familiar with Stanmore and the local planning and building control requirements.
Sign-off & warranty
We complete to building regulations standard and obtain all relevant sign-off. Your structural warranty covers up to 25 years.
Planning in Stanmore
**Side extensions and garages.** Many Stanmore properties have a garage or side space that can be incorporated into the main house footprint. We design and build garage conversions and side extensions as standalone projects or as part of wider packages. **Full house refurbishments.** We manage comp
Why choose RCB Design & Build in Stanmore?
Local knowledge
We work in Stanmore regularly. We know the planning authority, local building control, and the typical property types and challenges in this area.
Fixed-price guarantee
Your price is fixed before work starts. We absorb material and labour cost movements — not you.
Full principal contractor service
We manage every trade, every supplier, every inspection. You deal with one team from start to finish.
25-year structural warranty
All structural work is covered under our long-term warranty. Proof of quality, in writing.
Checkatrade-verified
Over 100 verified reviews from homeowners across London. Independently verified, not self-reported.
Design-and-build capability
We don't just build — we can support design development, planning applications, and pre-construction cost planning.
Other services in Stanmore
Start your Stanmore project
Free consultation. Fixed price. 25-year warranty. One team from first call to final sign-off.
Or call us on 07359 872594