House Extensions in Havering
Havering covers a wide stretch of outer East London from Romford (RM1) out to Upminster (RM14), Harold Wood and Rainham. Larger plots make extensions and garage conversions more viable here than in inner London.
House Extensions in Havering — what to expect
Havering's detached and semi-detached housing has plots wide enough for serious extensions. 6m and 8m rear extensions under prior approval are common across RM1–RM14. Side extensions into the garage, or full garage conversions, are popular. Double-storey extensions on wider detached plots are viable in Upminster, Emerson Park and Harold Wood.
Havering property types
Interwar and post-war detached and semi-detached, Victorian terraces in Romford town. The property type affects which extensions approach works best — we'll advise from the first call.
Common extensions projects we deliver in Havering
How we deliver extensions in Havering
Free consultation & survey
We visit your Havering 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 Havering 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 Havering
Havering is a Green Belt borough at its outer edges. Properties in Green Belt land (around Upminster, Cranham and Harold Hill) may face restrictions on extension size. Always verify with LBH Planning.
Why choose RCB Design & Build in Havering?
Local knowledge
We work in Havering 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 Havering
Start your Havering project
Free consultation. Fixed price. 25-year warranty. One team from first call to final sign-off.
Or call us on 07359 872594