New space engineered around the retained home
House Extension Richmond
North Star Building Solutions delivers house extensions in Richmond, coordinating planning, groundworks, structure, drainage, glazing, building services and fitted interiors around the existing home.
Every scope is reviewed against the actual property, available design information and agreed construction responsibilities before work begins.
The extension and original house must work as one building
A useful extension is more than extra floor area. In Richmond, period terraces, villas, cottages, mansion flats and later houses can sit beside mature trees, sloping gardens and sensitive streetscapes. Drainage, ground levels, retained fabric and previous extensions can alter the solution between nearby properties. Garden depth, daylight, levels, trees, drains, party walls and the relationship with original rooms are tested before the footprint and glazing are fixed.
Foundations, steelwork, retained walls, below-ground drainage and the temporary sequence are coordinated with the engineer’s information. Existing drains and utilities are traced where relevant, and unexpected conditions are recorded before the affected detail changes.
Roof junctions, insulation, airtightness, glazing, thresholds and rainwater disposal are designed as connected systems. Kitchens, lighting, heating, ventilation and floor finishes are then set out from verified dimensions before first fix and manufacture.
An extension coordinated with trees and levels
The footprint is developed with the existing house, garden levels, drainage and nearby trees in view. Foundation information and structural openings are coordinated before glazing is ordered. Roof overflows, threshold drainage, external falls and temporary weathering are resolved early because each sits at the critical junction between new construction and the retained home.
- Review tree information before foundation selection.
- Verify boundary and garden levels through survey.
- Coordinate glazing loads and installation tolerances.
- Test daylight, shading and ventilation together.
Site and feasibility review
Levels, boundaries, drainage, access, trees and neighbouring windows are considered alongside the desired plan.
Foundations and drainage
Ground conditions, excavation sequence, drains, manholes and service entries are coordinated before concrete and masonry proceed.
Structure and openings
Steelwork, bearings, temporary support and retained-wall stability follow the engineer’s design and planned inspections.
Envelope performance
Roofing, glazing, insulation, airtightness and weathering details are joined carefully at the original building.
Services and kitchen coordination
Power, water, waste, extraction, heating and lighting are set against confirmed cabinetry and appliance information.
Finishes and external works
Floor levels, plastering, joinery, decoration, patios and drainage falls are finished to an agreed sequence and sample standard.
Genuine project evidence
These genuine North Star images show groundworks, masonry, structure, first fix and interior completion relevant to an integrated extension programme. These photographs come from the North Star project archive. They demonstrate relevant construction stages but do not identify a client or claim that every image is from one named London address.
Neighbour interfaces and keeping the house protected
The London Borough of Richmond upon Thames planning record, conservation status, listed designation and tree constraints are checked for the property. Some addresses may also need specific flood or riverside considerations, while Building Regulations, Party Wall and ownership approvals remain distinct. Daylight, privacy, materials, drainage and the form of the retained house are addressed before structural and procurement decisions become expensive to change.
Residential roads, shared drives, mature planting and limited rear access influence scaffold, protection, delivery sizes, storage and waste routes. Temporary support, weathering, security, dust separation and safe routes are established before large openings connect the extension to the home.
Our delivery sequence
- Survey the house, garden, drainage and access.
- Coordinate design, planning and neighbour considerations.
- Complete structural and Building Regulations information.
- Plan protection, temporary works, logistics and procurement.
- Deliver groundworks, drainage, structure and envelope.
- Install services, glazing, kitchens and finishes.
- Test, snag, certify and hand over.
Frequently asked questions
Will an extension need planning permission?
It depends on the property, dimensions, planning history, conservation context and proposed external appearance. Permitted development rights must be checked rather than assumed.
When are Party Wall matters considered?
Early, where foundations, excavation or work to shared structures may fall within the legislation. The legal process is separate from the contractor’s construction role.
Can the kitchen be part of the same contract?
Yes. Cabinetry, appliances, services, lighting, flooring and decoration can be sequenced with the shell, subject to the agreed scope and supplier information.
How is the existing house kept weather-tight?
Temporary separation, roof and opening protection, drainage and an emergency response are planned before vulnerable stages begin.
Do trees affect a Richmond extension or renovation?
They can affect planning, foundation design, access and protection. Species, condition, ownership, protection status and distance from the proposed work must be checked for the actual site.
Watch a completed North Star project
Discuss your Richmond house extension project
Send the property address, proposed work, available drawings and target timing. North Star Building Solutions will explain the practical next step and the information needed for a dependable scope.
Request a consultationOffice: 020 3797 6399Mobile / WhatsApp: 07883 535012