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.
rcbGroup projectHouse 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 extension approach works best — we'll advise from the first call.
Common extension projects we deliver in Havering
How we deliver extension projects in Havering
Project review & site visit
We look at your Havering property and any drawings you have, explain what's possible, the likely planning and Building Regulations route, and the risks — 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.
Itemised scope and price
You receive a detailed, itemised scope of works and an agreed price before we start, with exclusions and provisional sums shown. Variations are agreed in writing before any additional work begins.
Managed delivery
We coordinate trades, procurement and site logistics, with a single point of contact throughout — working to the requirements of London Borough of Havering and Building Control.
Sign-off & handover
We coordinate the Building Control inspections needed for sign-off, then hand over your project documents — completion certificate, guarantees and manuals as applicable — with snagging and aftercare as set out in your contract.
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 rcbGroup in Havering?
Local context
We plan around London Borough of Havering's requirements and the typical property types in Havering — interwar and post-war detached and semi-detached, victorian terraces in romford town.
Price agreed before start
Your price is agreed and documented before work starts. Scope, exclusions, and assumptions set out in writing.
One accountable team
Trades, suppliers and inspections coordinated by one team — with CDM Principal Contractor duties taken on where we are appointed to build.
Written project documentation
A written contract before work starts, a Construction Phase Plan where we are appointed to build, and the completion certificate and handover documents gathered for you at the end.
Independently reviewed
Rated 10/10 from 117+ reviews on Checkatrade, where you can read them for yourself.
Support from planning to aftercare
We don't just build — we can support design development, planning applications, and pre-construction cost planning.
Planning an extension in Havering?
Pick whatever suits you. We'll look at what you have (drawings, photos or quotes) and tell you honestly what the next step should be.
Prefer to phone? Call +44 7359 872594.
Postcodes served: Havering
Not sure if we cover your street? Get in touch — we'll confirm in minutes.
Start your Havering project
Project review. Clear scope. Agreed price. One team from first call to Building Control sign-off.
Or call us on +44 7359 872594