House Extension Drawings in Colindale |

No Article 4 Direction covers Barnet, which keeps the Colindale permitted-development route open on unlisted houses. Colindale presents as post-war flats, new-build, so massing and materials carry more weight in the Barnet Council assessment than they would on an outer-London plot. If your Colindale address is inside Monken Hadley, treat permitted development as reduced and plan for a full Barnet Council application. Conservation status is checked against the Colindale address before design.

That check — Article 4 directions against the Colindale property — happens on day one. On Colindale stock the constraint is physical before it is planning: the post-war flats fixes the rear wall line and the Colindale station roofline caps the ridge. The borough policy layer over every NW9 address is set out on Barnet planning. The Colindale survey then carries into planning permission in Colindale if the project runs on to construction.

One to two weeks at London Borough of Barnet before a Colindale case reaches an officer. We start with a full laser survey of the Colindale address so the existing set is dimensionally right before anything proposed is drawn.

Statutory periods: 8 weeks from validation for a householder application, 13 weeks for a major scheme, 6 weeks for prior approval with a 21 days neighbour consultation, and 5 weeks for a full plans building control submission. A party structure notice requires one month notice and two months where excavation is involved.

A Colindale case only reaches committee if it draws significant objection. The NW9 pack is issued at 1:100 and 1:50 with a 1:1250 location plan.

Most Colindale refusals trace back to overlooking, not to size. We measure the NW9 property room by room, including ceiling heights and floor falls.

Party wall procedure catches most NW9 owners late; on Colindale stock assume it applies and serve in good time. Once consent is granted, building regulations drawings follows for the NW9 property.

Colindale is characterised by post-war flats, new-build, concentrated across NW9 in the Colindale / Kingsbury area. A Colindale scheme is designed around what the post-war flats can actually carry. Locally that resolves to this: post-war houses on these estates often sit under an estate management scheme, which can remove permitted development independently of any Article 4 direction. We resolve it before the Colindale design is fixed. A Colindale proposal that breaks the prevailing eaves line invites a refusal.

Barnet Council assesses Colindale basements on standard grounds. The same Colindale drawings carry through to loft conversion drawings for NW9 properties and architectural drawings.

What the Colindale drawing pack contains

Here is what a NW9 instruction actually produces.

• existing and proposed ground-floor plans for the Colindale property
• proposed rear elevation
• long section through the extension
• site and block plans
• party wall position drawing

Local landmarks that shape a Colindale application

• Mill Hill — roof profiles that set the ridge datum Barnet Council measures a Mill Hill dormer against.
• Golders Green — roof profiles that set the ridge datum Barnet Council measures a Golders Green dormer against.
• Grahame Park — closet wings that change how a rear extension meets the Grahame Park back addition.
• Colindale station — Barnet Council weighs NW9 sightlines to it in the character assessment.
• British Library — massing on adjoining NW9 plots is tested against it.
• Hendon Police College — schemes visible from it get closer scrutiny in Barnet.
• Colindale Hospital — a Colindale roof extension is judged against the datum it sets.

Getting to a Colindale survey

Surveyors travel to NW9 addresses from the studio; the nearest stations are Colindale. Appointments are booked in Colindale on weekdays and Saturdays, and the measured survey of a standard post-war flats takes two to three hours.

Where Colindale sits

Colindale lies 8 miles (13 km) northwest of Charing Cross, on Ordnance Survey grid reference TQ213897. Barnet Council checks the Colindale location plan against that reference before registering it. Source.

Practical detail for a Colindale submission: Colindale put Colindale within easy reach; NW9 addresses are written to LONDON; dialling code 020. Site plans are drawn to the address as Barnet Council holds it.

Colindale postcode coverage

We survey and draw across NW9 (Colindale / Kingsbury), which Colindale holds on its own. The NW9 boundary decides which Barnet designations apply to your Colindale address.

Streets and stations in Colindale

Our NW9 caseload covers Mill Hill, Golders Green and Grahame Park. most Colindale sites are within walking distance of Colindale.

Areas we cover around Colindale

We survey across Wood Green (N22), Enfield Town (EN1, EN2), Palmers Green (N13), Winchmore Hill (N21), Southgate (N14), Edmonton (N9, N18) as well as Colindale itself, plus the Harrow side of the boundary.

Two Colindale jobs differ in price because of the post-war flats and the Monken Hadley designation, never because of hours booked.

Statutory application fees are set by regulation, not by the council: £548 householder, £610 for a new dwelling, £274 for a lawful development certificate, £249 for prior approval.

That fee is collected by London Borough of Barnet when the NW9 application is lodged. London planning approval-rate dataset · Barnet planning · our London house extension drawings service · house extension drawings in Wood Green.

The technologist drawing your Colindale scheme is MCIAT chartered — the professional body for technical design and building-regulations competence. When a Colindale case could go either way we pay for Barnet Council pre-application advice rather than test it live.

Drawings are produced by chartered members of the Chartered Institute of Architectural Technologists (MCIAT), the professional body for technical design and building-regulations competence. First-time approval across our London caseload is 98%. Statutory fees shown are those in force in England in 2026 under the Town and Country Planning (Fees for Applications) Regulations. Confirm your local authority at gov.uk and submission requirements on the Planning Portal. Studio: 71–75 Shelton Street, London WC2H 9JQ.

We will tell you if a Colindale project does not need us. This Colindale page was reviewed in August 2026.