Builder in Northolt, UB5 — Extensions, Loft Conversions, and Full Renovations
Jaspal Constructions Limited carries out building and renovation projects in Northolt from our base at 170 Kings Avenue, Greenford, UB6 9DF — less than 2 miles from Northolt's residential streets. Since 2011, across over 2,000 completed projects, we have delivered house extensions, loft conversions, full house renovations, kitchen and bathroom refurbishments, garage conversions, electrical rewires, boiler installations, roofing, plastering, flooring, painting, and new builds throughout the UB5 postcode.
Average properties in Northolt sell for approximately £502,909 in 2026, with current listing prices averaging £511,320, up 4.07 percent over the past six months (GetAgent 2026). Detached houses in UB5 average £675,000. Northolt's predominantly 1930s semidetached stock is among the most renovation-ready in West London — many properties have never been extended, presenting clear first-extension opportunity within Permitted Development.
Public liability insured · NICEIC-certified · Gas Safe registered · JCT contracts on every project.
Local Knowledge
The Northolt Housing Stock — 1930s Semis and First-Extension Opportunity
Northolt is one of the most consistent interwar housing areas in West London. The residential streets of UB5 — Western Avenue, Church Road, Mandeville Road, Wayfarer Road, and the streets off Yeading Lane and Kensington Road — are lined almost entirely with three-bedroom cavity-wall semidetached houses from the 1920s and 1930s.
A significant proportion of these properties have never been extended. This matters for renovation value: a homeowner adding a first rear extension to a Northolt 1930s semi that has never had one is not competing against a neighbour who already has a larger kitchen — they are capturing a genuine per-square-metre value uplift that the unextended property cannot access. A Velux loft conversion on the same property converts redundant roof space into a fourth bedroom within Permitted Development at a cost of £25,000 to £45,000.
The UB5 postcode also includes pockets of post-war London County Council estate housing. These properties have flat or low-pitched roof elements, non-standard wall constructions, and in some cases structural frame systems rather than traditional masonry. We assess the construction type at survey and specify renovation work accordingly — a one-size approach that works on the 1930s stock does not automatically apply to post-war estate properties.
£502,909
Average sold price, Northolt 2026
£675,000
Average detached house price, UB5
Our Work
Recent Projects in Northolt, UB5
A selection of extensions, loft conversions, and renovations completed for homeowners across UB5 — built on time, on budget, and to a fixed-price quote.
Services
Building Services in Northolt — What We Deliver in UB5
House Extensions in Northolt
We build rear extensions and side extensions on Northolt semidetached and terraced properties throughout UB5. A single-storey rear extension in Northolt costs approximately £35,000 to £70,000 in 2026. Most UB5 1930s semis qualify for a rear extension up to 3 metres under Permitted Development, extendable to 6 metres under the Neighbour Consultation Scheme. We manage the Lawful Development Certificate with the London Borough of Ealing and all Building Regulations.
Loft Conversions in Northolt
We convert roof spaces on Northolt's 1930s housing into bedrooms, home offices, and en-suites. Velux loft conversions in Northolt: £25,000 to £45,000. Dormer loft conversions: £45,000 to £75,000. The standard UB5 gable-roof semidetached house has sufficient volume for a Velux conversion within the 50m3 Permitted Development allowance. We measure the roof space at the free survey and confirm viability before any design is commissioned.
Full House Renovation in Northolt
Complete renovation programmes across Northolt's 1930s stock: all trades from strip-out to decoration, managed under a single JCT contract. Full 3-bedroom Northolt semi renovation: £60,000 to £140,000 depending on scope and specification.
Kitchen Renovation in Northolt
Kitchen refits and open plan kitchen renovations in UB5 homes. London mid-range kitchen refit: £10,000 to £20,000. Full structural kitchen renovation with wall removal and open plan reconfiguration: £40,000 to £100,000+.
Bathroom Renovation in Northolt
Family bathrooms, en-suites, wet rooms, and cloakrooms across Northolt. London mid-range bathroom renovation: £8,000 to £15,000. Tanking to BS 8000-0 on all shower areas. Part P certification on all bathroom electrics.
Garage Conversion in Northolt
Many UB5 1930s semis have an integral or attached garage that converts efficiently into a bedroom, home office, or utility room without planning permission. Integral garage conversion in Northolt: £18,000 to £35,000. Building Regulations approval always required.
Electrical Services in Northolt
NICEIC-certified EICR inspections, full rewires (3-bed London: £4,500 to £9,000), consumer unit upgrades (£450 to £950), and EV charger installation (£800 to £1,500) throughout UB5. All work Part P self-certified.
Plumbing and Heating in Northolt
Gas Safe registered boiler installation, central heating, and bathroom plumbing in Northolt. Combi boiler installation: £3,200 to £5,500. Benchmark Commissioning Checklist completed. Gas safety certificate issued on every gas installation.
Roofing in Northolt
Flat roof replacement on Northolt extensions (EPDM £40–£70/m2, GRP £50–£80/m2), pitched roof repair and tile replacement, ridge re-bedding, chimney flashing, and guttering replacement across UB5.
All Other Services in Northolt
We also deliver in Northolt: basement conversions, plastering and rendering, flooring, painting and decorating, carpentry and joinery, and new build construction.
Planning
Planning in Northolt — London Borough of Ealing
Northolt UB5 falls within the London Borough of Ealing for all planning purposes. Ealing Council targets 8 weeks for standard householder applications. Householder planning fee: £528 from April 2025. Standard Permitted Development rights apply to most UB5 properties. We confirm the planning position and advise on LDC vs full application at the free survey, and manage all Ealing submissions on behalf of our Northolt clients.
Key Facts
- Standard householder applications
- 8 weeks
- Householder planning fee (from Apr 2025)
- £528
- Lawful Development Certificate
- £103–£310
Why Us
Why Northolt Homeowners Choose Jaspal Constructions
Less than 2 miles from Northolt means our team is on UB5 streets regularly. We know which residential streets have parking restrictions during school hours, how to arrange skip licences with Ealing Council for narrow Northolt roads, and how to manage concrete deliveries on the tighter UB5 5 terraced streets. Being local is operational, not just geographical.
Credentials:
NICEIC Certified Electricians
Gas Safe Registered Engineers
Public Liability Insurance
JCT Domestic Building Contracts
5-Year Guarantee
What Our Northolt Clients Say
We are actively building our Google review profile from UB5 clients. If you are a previous Northolt client, we would be grateful for an honest review of your experience.
FAQ
Frequently Asked Questions — Building in Northolt
Can I build a rear extension on my Northolt 1930s semi without planning permission?
Most Northolt 1930s semidetached houses in UB5 can accommodate a single-storey rear extension up to 3 metres under Permitted Development without a planning application to Ealing Council. Under the Neighbour Consultation Scheme this extends to 6 metres. A Lawful Development Certificate (£103 to £310) confirms this in writing before work starts. We confirm the PD position for your specific address at the free survey.
How much does a loft conversion cost in Northolt in 2026?
A Velux loft conversion in Northolt costs £25,000 to £45,000. A dormer loft conversion costs £45,000 to £75,000. Fixed-price written quote provided after surveying your specific roof space.
My Northolt property has never been extended — is it too late?
Not at all. A Northolt 1930s semi that has never been extended is, if anything, a better candidate than one that has been partially extended, because the full Permitted Development volume allowance is available. We advise on the maximum extension scope at the free survey.
Do you work near Northolt Aerodrome?
Yes. We work throughout UB5 including properties close to the aerodrome boundary. For properties within designated noise exposure zones, we advise on any additional ventilation considerations that may arise from current planning conditions. These are addressed at the free survey.
How much does a full house renovation cost in Northolt?
A full 3-bedroom semi renovation in Northolt typically costs £60,000 to £140,000 depending on scope and specification. We provide a detailed, itemised written quote after the free survey.
Which planning authority covers Northolt?
The London Borough of Ealing covers all of Northolt UB5. Planning applications are submitted to Ealing Council.
Book Your Free Survey in Northolt
We are based nearby in Greenford. We can visit your property, assess the project, confirm the planning position, and provide a detailed fixed-price written quote.
Get in Touch
Jaspal Constructions Limited
Sat: 8:00am – 1:00pm