Loft Conversions in Northwood, HA6
Dormer, hip-to-gable and mansard loft conversions for houses in Northwood: a bedroom and bathroom under the roof, designed and built by one team.
Covered under one contract
- Structural design and calculations
- Planning or lawful development certificate
- New staircase, dormer and roof windows
- Insulation, fire safety and building control
- En-suite designed and fitted
- Waterproofing with guarantee for basements
Loft Conversions in Northwood.
A loft conversion adds a bedroom and bathroom without touching the garden, and in most of Northwood it is the most cost-effective way to gain a floor. Which type suits your house depends on the roof: Victorian and Edwardian terraces usually take a rear dormer, 1930s semis with hipped roofs need a hip-to-gable conversion to make the space usable, and in conservation areas a mansard or rooflight scheme may be the only option.
We start by measuring the roof. About 2.2 metres from the top of the joists to the ridge is needed for a comfortable room; we check this at the first visit before anything is drawn. From there our architects design the layout and the stair, our engineers design the new floor and any steelwork, and our team builds it with the house occupied throughout.
Most lofts are permitted development within the 40 or 50 cubic metre allowance, with the dormer at the rear. Flats, listed buildings and streets with Article 4 directions need a planning application, and every loft needs building regulations approval for the structure, fire escape and insulation. We manage all of it.
- Area
- Northwood, HA6
- Council
- London Borough of Hillingdon
- Housing
- Large Edwardian and inter-war detached houses on wide plots, 1930s semis, post-war houses towards Moor Park
- Transport
- Northwood, Northwood Hills (Metropolitan)
- Loft, on site
- 8 to 12 weeks
- Headroom needed
- About 2.2 m at the ridge
- Consent
- Often permitted development for lofts
Northwood: the houses and the planning rules.
Northwood grew up around the Metropolitan line station in the early 1900s, with substantial Edwardian houses along the tree-lined roads to the east and inter-war housing filling the rest. Plots are large, the houses are detached, and the neighbouring Moor Park estate raises the ceiling on what owners will invest.
The projects here are among the largest we do outside central London: double-storey rear extensions, full refurbishments with new services and layouts, new kitchens and bathrooms throughout, and loft conversions within the deep hipped roofs.
The Northwood Frithwood and Green Lane conservation areas cover parts of the district; most streets are unrestricted.
London Borough of Hillingdon
Hillingdon decides applications. Large plots mean most single-storey extensions are permitted development, while double-storey schemes need a householder application.
Conservation areas
In the Frithwood and Green Lane areas, external changes are assessed against the conservation area appraisal, with attention to trees and boundary treatments.
Moor Park
On the Moor Park estate, the residents' association has its own covenants and approval process alongside planning.
Approvals for loft conversions in Northwood.
Most loft conversions are permitted development within the 40 cubic metre allowance for a terrace or 50 for other houses, with the dormer at the rear. Conservation areas, flats and front dormers need a planning application, and every loft needs building regulations approval.
Hillingdon decides applications. Large plots mean most single-storey extensions are permitted development, while double-storey schemes need a householder application.
What loft conversions in Northwood includes.
- Structural design and calculations
- Planning or lawful development certificate
- New staircase, dormer and roof windows
- Insulation, fire safety and building control
- En-suite designed and fitted
- Waterproofing with guarantee for basements
From site visit to handover.
- 01
Site visit & consultation
We visit, listen and measure. Brief, budget and constraints understood before any advice is given.
- 02
Design & itemised quote
Our architects and engineers draw the scheme, and from that we provide a transparent, itemised quotation for your approval.
- 03
Planning & approvals
Planning applications, building control and party wall matters handled for you.
- 04
Build, managed weekly
Our own trades, sequenced by a site manager. Progress reported every week.
- 05
Handover & aftercare
Joint snagging walk-through, documentation, and a guarantee on our workmanship.
Loft Conversions in Northwood: your questions.
Is a loft conversion in Northwood permitted development?
Often, provided the added volume is within 40 cubic metres for a terrace or 50 for other houses and the dormer is at the rear. Flats, listed buildings and streets with Article 4 directions need an application to the London Borough of Hillingdon.
How much headroom do I need for a loft conversion?
About 2.2 metres from the top of the ceiling joists to the ridge. Victorian and Edwardian roofs usually have it; 1930s hipped roofs often need a hip-to-gable conversion to make the space usable. We measure at the first visit.
Which parts of Northwood do you cover?
All of Northwood and HA6, including Green Lane, Frithwood Avenue, Watford Road, Murray Road, Dene Road, Eastbury Road, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Other services in Northwood.
House Refurbishment in Northwood
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Flat Refurbishment in Northwood
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House Extensions in Northwood
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Structural Alterations in Northwood
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Basement Conversions in Northwood
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Kitchen Renovation in Northwood
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Bathroom Renovation in Northwood
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Bespoke Joinery & Fitted Furniture in Northwood
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Architectural & Interior Design in Northwood
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Planning Permission & Building Regulations in Northwood
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We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.