Prime Residential Builders
in Northwood & Pinner

A London prime contractor, minutes from Northwood & Pinner

Crown Building has been delivering prime residential construction since 2013, and Northwood & Pinner sits comfortably within the daily operating radius of our Watford headquarters. While much of our work is in the prime central London postcodes, Mayfair, Chelsea, Knightsbridge, Belgravia, our roots, our team and our registered office are minutes away. For homeowners in Northwood & Pinner, that means a contractor working to a genuine prime residential standard, with senior management close enough to be on site whenever the project needs them.

We do not operate at volume. We compete on execution. The discipline that the best London projects demand, meticulous programming, a trusted specialist supply chain, senior management present on site throughout. Is exactly what we bring to a home in Northwood & Pinner. The standard does not change with the postcode.

What we build in Northwood & Pinner

Our residential work spans the full scope of high end building. We deliver architecturally distinctive new build homes, private residence refurbishments and structural reconfigurations, single and multistorey extensions, basement excavations, listed and period property works, and the bespoke joinery and interiors that define a finished home. Each project is delivered as design and build or contractor only, with Crown appointed as your prime residential main contractor, and transparent, itemised pricing from the outset. Commercial occupiers are served by the same teams through our commercial fit out division, and clinical and wellness premises through our healthcare and specialist environments team.

Moor Park is the anchor here: a private estate of substantial interwar mansions where private residence refurbishment briefs routinely reach genuine prime specification: full structural remodelling, basement leisure suites, bespoke joinery packages and complete services replacement. Northwood's avenues and Pinner's conservation core carry strong Metroland and period stock alongside. Estate regulations, conservation constraints and demanding neighbours all reward a contractor that plans meticulously and manages the site professionally, which is precisely how we run every project, from Mayfair to Moor Park.

Areas we serve

We cover Moor Park, Northwood, Northwood Hills, Pinner, Hatch End and Eastcote, with Rickmansworth and Watford immediately adjacent to our office. You can see our full coverage, London within the M25 and a fifteen mile radius of our Watford headquarters, on our areas we cover page.

Northwood and Pinner are in different boroughs

This is worth establishing at the outset because it changes everything that follows. Northwood is in Hillingdon. Pinner is in Harrow. Eastcote straddles the two, and both councils designate an Eastcote Village conservation area, so on the boundary the correct authority has to be checked against the address rather than assumed.

The two regimes differ substantially. Harrow adopted a new Local Plan on 24 March 2026 with a basement policy, Policy GR4A, limiting a basement to fifty per cent of the site's amenity space and no more than fifty per cent of the host dwelling's depth into the rear garden, restricting basement space to ancillary use and requiring a construction method statement. Hillingdon's Policy DMHD 3, adopted in January 2020, takes a different approach: subterranean development extending the full length or full width of a property will not be supported, front and side lightwells are not acceptable, basements are not permitted in listed buildings, and habitable rooms are refused in Flood Zones 2 and 3. Hillingdon sets no garden percentage and no storey cap, so those figures should not be quoted for a Northwood address.

Hillingdon's borough wide Article 4 on rear extensions

Northwood carries a constraint that catches out anyone applying standard permitted development assumptions. Since 22 September 2014 Hillingdon has operated a borough wide Article 4 Direction removing permitted development rights for single storey rear extensions projecting beyond four metres from the original rear wall.

That is precisely the size of extension most householders assume they can build under the larger home extension route without a full application. In Hillingdon they cannot. The borough has thirty one conservation areas, including Northwood Town Centre and Green Lane, Frithwood and The Glen, and further directions cover houses in multiple occupation and commercial to residential conversion. Harrow, by contrast, applies its Article 4 directions conservation area by conservation area, with five of the Pinner conservation areas covered, so on the Pinner side the question is whether the specific area is designated.

Aerodrome safeguarding, and thirteen conservation areas in Pinner

Hillingdon's Policies DMAV 1 and DMAV 3 require aerodrome safeguarding and consultation with operators for development affecting Heathrow and RAF Northolt, with Public Safety Zones restricting development that would increase occupancy. RAF Northolt sits close enough to Northwood that safeguarding is a live consideration on taller or larger schemes rather than a theoretical one, and it is checked at design stage rather than discovered at consultation.

Pinner, on the Harrow side, has thirteen conservation areas, more than any other part of that borough, which reflects how much of its historic village core and interwar suburban development is designated. Harrow has over three hundred statutory listed buildings and more than seven hundred locally listed, while Hillingdon has around four hundred and nine statutory and a further two hundred and ninety two locally listed. On either side of the boundary the designation position needs establishing for the specific property before a scheme is drawn.

Speak to us about your Northwood & Pinner project

If you are planning a build, refurbishment or extension in Northwood & Pinner, call us on 020 3675 3999 or book a free consultation here. Our registered office is Unit 324-B, The Wenta Business Centre, Colne Way, Watford, WD24 7ND.

Frequently asked questions

Where is Crown Building based?

Crown Building's registered office is at Unit 324-B, The Wenta Business Centre, Colne Way, Watford, WD24 7ND. We work throughout London within the M25 and across Hertfordshire and the Home Counties.

Which areas around Northwood & Pinner do you cover?

We cover Moor Park, Northwood, Northwood Hills, Pinner, Hatch End and Eastcote.

Do you work on the Moor Park estate?

Yes. We are familiar with private estate requirements including estate covenants, working hours restrictions and contractor conduct rules, and we deliver private residence refurbishments there to full prime residential specification.