House Extensions in Godalming — Planning, Structure & Finishes
A successful extension should feel original to the house, not bolted on. We handle the process end-to-end—feasibility and permissions, foundations and structure, a weather-tight shell and coordinated trades—so you get more space with minimum disruption. Details at eaves, thresholds and services are planned early, keeping costs predictable and finishes crisp. You’ll have clear timelines, photo updates and a tidy site throughout. Many of our house extensions are completed in Godalming, where blending new space with period or modern homes is essential.
Feasibility, Design & Permissions
We start with how you want to live: light, flow and storage. A quick feasibility checks headroom, drainage, access and budget, then we shape the plan with you and your designer. We’ll flag anything that could slow consent or add cost—party walls, trees, levels—so decisions are made before the build, not during it. This early planning stage is particularly valuable for Godalming homeowners, where conservation areas and character streets can affect design choices.
Permitted Development vs Planning
Many extensions fall under Permitted Development if size, height and position rules are met. Where planning is required, we supply measured surveys, advice on massing/materials and practical tweaks that ease approval. Either way, we build to current Building Regulations with the paperwork to match.
Surveys, Drawings & Budget Options
Measured drawings set out structure, services and finishes. We provide budget options—standard vs premium glazing, flat vs pitched sections—so you can prioritise spend. A staged programme and payment schedule keep the project transparent from day one.
Groundworks & Structure
Good groundworks prevent future movement and damp. We set out lines and levels, install foundations suited to your ground and nearby trees, and coordinate drainage/service runs before slabs go down. Structure is erected straight and braced so doors, windows and kitchens fit perfectly. This is critical in Godalming properties, where uneven ground and tree roots often require careful engineering.
Foundations, Drainage & Services
Foundations are confirmed with Building Control; drains are diverted or upgraded with new inspection points where needed. We sleeve services and maintain falls to prevent future blockages, then cast slabs level and ready for finishes or underfloor heating.
Steelwork (RSJs) & Structural Openings
Knock-throughs are propped safely, steels installed to engineer’s detail and packed/bolted correctly. We leave straight reveals and accurate levels so plaster lines and kitchen runs stay true. Temporary weathering keeps the house secure while the shell goes up.
Envelope & Roof
The new shell is built to match or complement the original: true brickwork, tidy cavities and insulated roofs that meet Part L. We manage junctions to the existing house carefully so there are no future cracks or cold spots.
Brickwork/Blockwork & Cavity Details
Bonds, joint profiles and mortar colours are matched where required. Cavity trays, closers and weeps are installed as we build, keeping moisture paths correct and thermal bridges controlled around openings.
Pitched/Flat Roofs, Warm Roof Build-ups
Pitched sections are hand-cut or trussed with proper ventilation; flat roofs use warm-roof build-ups for comfort and condensation control. We form neat eaves and integrate rooflights or lanterns with manufacturer flashings.
Windows, Doors & Weathering
Glazing is sized for views and daylight, with secure thresholds and smooth operation. We detail sills, trays and flashings so the openings stay dry and draught-free, and we coordinate with your chosen supplier for templates and lead times.
Lintels, Thresholds & Trims
Correct lintels are installed with bearings to spec; thresholds sit flush where possible with compliant step-downs outside. External trims and sealants are colour-matched for a factory-finished appearance.
First Fix: Electrics, Heating & Plumbing
Services are routed logically with spare capacity for the future. We agree socket and lighting layouts, heating zones and appliance positions before walls are closed, avoiding later compromises and extra costs.
UFH, Radiators & Smart Controls
Underfloor heating gives even warmth and free wall space; where rads suit better, we size them to the glazing and room volume. Smart controls set independent schedules and help running costs stay sensible.
Interiors & Finishes
We deliver clean, straight finishes ready for your furniture and fittings. Plaster is allowed to dry correctly, carpentry lines are tight and floors are protected between trades. Snags are tackled before handover, not after.
Plastering, Joinery & Flooring
Walls are taped and skimmed for sharp corners; skirting, architraves and doors are fitted with consistent gaps; floors are laid on flat substrates with neat transitions to existing rooms.
Building Control, Certificates & Handover
Inspections are booked, hidden works photographed and certificates compiled (electrical, gas, glazing, insulation). You’ll receive a simple handover pack with care notes and contacts for future tweaks or additions.
Why Choose DM Jones Contractors
- ✓ Clear feasibility, drawings and realistic budgeting before work starts.
- ✓ Solid groundworks, straight structure and tidy knock-throughs with correct RSJs.
- ✓ Shells that match the house: true brickwork, warm roofs and crisp junctions.
- ✓ Thoughtful glazing, secure thresholds and watertight detailing.
- ✓ Coordinated services with UFH/radiator options and smart controls.
- ✓ Clean programme, respectful team and a photographed, certified handover.
Request an Extension Quote
Share your drawings (or a quick sketch with sizes), a couple of photos and your postcode. Tell us the finish you’re aiming for and any target dates. We’ll visit, confirm structure and services, and return a clear, itemised quotation with options for glazing, heating and programme. Many of our recent projects have been completed in Godalming, so we understand the local planning environment and practical build challenges.
