Our Services
House Extensions
About This Service
House Extensions You Can Trust
Local homeowners praise our clear WhatsApp updates and punctual handovers. Project-managed from planning to completion, James Building & Roofing Cambs coordinates structural work with masonry and installs new roofing over extensions, including complex tie-ins to existing roofs across Cambridge and surrounding villages. FMB accredited with 23 years' experience, every job carries a 12-month guarantee and fast emergency call-outs.
Our Process
How It Works
Site survey and brief
We survey the property, check existing roof structure and drainage, and agree the programme, materials and tie-in details with you and your architect or builder.
Planning and coordination
We handle roofing specifications, liaise with structural engineers and bricklayers, and submit details where required to meet building regulations.
Build, seal and handover
Work is carried out to agreed milestones, with temporary protection where needed, final roof tie-ins, flashing and a full handover including snagging and a 12-month guarantee.
Benefits
Why Choose us for House Extensions?
Proven trade credibility
Federation of Master Builders accreditation and 23 years' experience give you confidence in structural coordination, roofing standards and regulatory knowhow.
Complete project management
From planning and engineer liaison to roof tie-ins and final lead flashings, we manage the roof works so your builder can keep the programme moving.
Fast, friendly communication
Same-day emergency call-outs, clear WhatsApp updates and a 12-month guarantee ensure works are secure and you are kept informed at every stage.
Roofing for extensions demands precision: tying a new roof to an existing slope, matching tiles or slate, and ensuring watertight flashings are all specialist work. We install new roofing over rear and side extensions, handle flat-to-pitched transitions, fit continuous gutters and carry out lead work and flashings to meet building regulations and prevent leaks at junctions.
We work on Victorian terraces, 1930s semis and modern new builds across Cambridge and nearby villages, adapting methods and materials to suit the existing property. For a site visit or to discuss your architect's drawings, call or WhatsApp 07546498346 or email jbrcambs@gmail.com. All work is fully insured and backed by a 12-month guarantee.
FAQ
Frequently Asked Questions
Most single storey rear extensions fall under permitted development, but roof shape, height and materials can affect that. We will review your plans and advise if a planning application or prior approval is likely, and work with your architect or planning agent to provide roof details.