Trusted design and build specialists
Builders Whetstone
North Star Building Solutions is a London building contractor delivering house renovations, extensions, loft conversions and structural alterations in Whetstone. We coordinate trades, inspections, procurement and finishes as one connected programme.
Building work planned around the existing property
Whetstone includes Victorian and Edwardian houses, inter-war semis, post-war homes, flats and newer infill. Properties close to the High Road can have restricted deliveries, while quieter residential streets often contain extensions and earlier alterations that affect structure and drainage.
The London Borough of Barnet is normally the planning authority. Conservation areas, Article 4 controls, trees and the cumulative effect of earlier development are address-specific checks.
We plan delivery slots, waste removal, temporary parking, scaffold access and protection for shared routes before disruptive work begins. We review access, existing services, neighbour interfaces and the technical information available before a dependable construction scope is fixed.
House renovations
Whole-house work can include structural reconfiguration, rewiring, plumbing, heating, plastering, joinery, kitchens, bathrooms, flooring and decoration. Retained areas are protected and first-fix services are checked against the final room layouts before closure.
Rear and side extensions
Foundations, drainage, steelwork, insulation, roof build-up and weathering are coordinated with glazing, thresholds and finished floor levels. Temporary support and the connection to the existing house are planned before openings are formed.
Loft conversions
Feasibility depends on ridge height, roof form, staircase position, structure, fire safety and planning context. The new floor, altered roof, insulation, ventilation and services are developed together rather than as isolated packages.
Structural alterations
Load-bearing wall changes require engineer design, but safe delivery also depends on temporary works, bearing details, access and installation sequence. New elements are coordinated with services, fire protection and the finished architecture.
Kitchens and bathrooms
Cabinetry, appliances, worktops, drainage, ventilation, waterproofing, lighting and finishes need accurate setting out. Required valves, traps and controls remain serviceable after the room is complete.
Energy and building-fabric upgrades
Insulation, glazing, airtightness, ventilation and heating changes must work as a balanced system. Moisture risks and junction details are considered when upgrading an existing home.
Genuine project evidence
The photographs below are genuine construction evidence from the North Star project archive. They do not identify a client or exact residential address. The captions describe the stage shown; they do not claim that every image comes from the location named on this page.
Quality, compliance and communication
Construction quality is supported by clear information and checks at the right stage. We record key concealed work, coordinate inspections and test relevant systems before handover. Where an unforeseen condition affects cost or timing, the evidence and options are explained before related extra work proceeds whenever safety and site protection allow.
Planning approval does not replace construction design. Architectural drawings, structural information, product data, temporary works and inspection requirements are aligned with the actual build sequence.
Our project process
- Initial discussion — property, objectives, design status, budget range and timing.
- Site review — access, existing conditions, services and likely risks.
- Technical coordination — architectural, structural and building-services information.
- Scope and quotation — work packages, responsibilities, allowances and exclusions.
- Pre-construction — logistics, procurement, protection and inspection planning.
- Construction and fit-out — managed trades and specialist packages.
- Commissioning and handover — testing, snagging and completion information.
Frequently asked questions
What building work do you undertake in Whetstone?
Projects can include whole-house renovations, extensions, loft conversions, structural alterations, kitchens, bathrooms and associated external work. Suitability is confirmed after reviewing the property and scope.
Can you coordinate structural engineering and Building Control?
Yes. We coordinate the appointed engineer’s information with the build sequence and arrange relevant Building Control inspection stages within the agreed scope.
Will the work need planning permission?
It depends on the property, proposed work, previous development and local constraints. Planning, permitted development, Building Regulations and Party Wall procedures are separate checks.
Can the house remain occupied?
Sometimes for a limited or phased scope. Major structural, services or whole-house work is usually safer and more efficient in a vacant property. We explain the implications before the programme is agreed.
How is the quotation prepared?
A measured scope, design information, product decisions and known site constraints provide the best basis. Assumptions, allowances and exclusions should be clear before construction starts.
Watch a completed North Star project
Discuss your Whetstone project
Tell North Star Building Solutions about the property, proposed work, design information and target timing. We will explain the practical next step for a dependable scope.
Request a consultationOffice: 020 3797 6399Mobile / WhatsApp: 07883 535012
Recent projects nearby
Completed work by our own team in and around this area. Client references are available on request.
Whetstone, N20
Double-storey & side extensions with full renovation
July 2025 – February 2026
Double-storey rear extension, side extension and new front porch, with full structural works, plumbing and electrics, underfloor heating, a new open-plan kitchen, bathrooms, aluminium sliding doors and full finishing.
Whetstone, N20
Rear extension, loft conversion & full renovation
Completed December 2025
A single-storey rear extension with an open-plan kitchen, a full loft conversion, roof replacement with new felt and battens, underfloor heating to the ground floor, new kitchen and bathrooms, full electrics and plumbing, and garden landscaping.