New space engineered around the retained home
House Extension Hammersmith
North Star Building Solutions delivers house extensions in Hammersmith, 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 Hammersmith, terraced houses, villas, mansion flats and converted properties often combine period fabric with compact gardens and busy urban access. Retained details, party walls, drainage and earlier extensions need to be understood before demolition or procurement. 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.
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 Hammersmith and Fulham planning context, conservation designation and property history are checked for the address. Leasehold approval, Party Wall procedures and Building Regulations remain separate. Daylight, privacy, materials, drainage and the form of the retained house are addressed before structural and procurement decisions become expensive to change.
Busy roads, parking controls, narrow side returns and occupied neighbours influence delivery windows, skips, scaffold, temporary weathering and working-hour planning. 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.
How early should access be planned in Hammersmith?
Before the quotation and programme are finalised. Delivery sizes, parking suspensions, scaffold or licences, material storage and waste routes can directly affect cost, sequence and the amount of work completed each day.
Watch a completed North Star project
Discuss your Hammersmith 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