House Extension Drawings in Mill Hill |

No Article 4 Direction covers Barnet, which keeps the Mill Hill permitted-development route open on unlisted houses. Being Georgian and 1930s detached, Mill Hill rewards schemes that sit quietly beside Mill Hill Village. Mill Hill is the designation that most often reshapes a Mill Hill proposal; Barnet carries 20 of them. Conservation status is checked against the Mill Hill address before design.

Before drawing anything for Mill Hill, we check Article 4 directions against the NW7 boundary. Measure a NW7 property and the georgian villas answers most of it — where the original rear wall sat, and what height the Mill Hill street will carry. The borough policy layer over every NW7 address is set out on Barnet planning. The Mill Hill survey then carries into building regulations drawings in Mill Hill if the project runs on to construction.

London Borough of Barnet takes one to two weeks to validate a Mill Hill submission. Week one is a laser measured survey at your Mill Hill property; the existing plans are drawn from that survey, never from an estate agent's floorplan.

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.

Officer queries on a Mill Hill application come to us, not to you. Output for Mill Hill: dimensioned PDFs at the scales the authority specifies.

We would rather redesign a NW7 rear elevation than argue an objection. A Mill Hill measured survey captures the roof structure as well as the plan.

Budget notice time on any Mill Hill job touching a shared wall. Once consent is granted, loft conversion drawings follows for the NW7 property.

Mill Hill is characterised by georgian villas, 1930s detached and semi-detached, concentrated across NW7 in the Mill Hill area. Mill Hill is not uniform, but the georgian villas recurs often enough across NW7 that the structural pattern is predictable once measured. In practice on a Mill Hill job, georgian rear elevations here are usually the listed or locally listed face of the building, so a glazed link and a lightweight rear addition tend to fare better than a full-width box. In NW7 that determines the depth we can draw. Massing on a Mill Hill scheme is argued against the Mill Hill Village street rhythm.

Basement work at a Mill Hill address is judged on amenity, drainage and structure. A Mill Hill survey done once feeds architectural drawings for NW7 properties and planning permission later.

What the Mill Hill drawing pack contains

The drawing schedule for a Mill Hill project runs as follows.

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

Streets and landmarks we survey around Mill Hill

• Graham Hill — front-to-back level changes that drive the Graham Hill section drawings.
• Damon Hill — shared flank walls, so Damon Hill party structure notices go out before work starts.
• Holders Hill — shared flank walls, so Holders Hill party structure notices go out before work starts.
• Mill Hill Park — gardens deep enough for the 8 weeks householder route on a Mill Hill Park plot.
• Mill Hill Village — proposals within its setting are drawn with the context elevation included.
• Maudsley Hospital — nearby georgian villas takes its scale from this frontage.
• Mill Hill Cemetery — massing on adjoining NW7 plots is tested against it.
• Copthall School — schemes in view of it attract closer officer scrutiny.
• Mill Hill County High School — it fixes the local datum a Mill Hill roof extension is judged against.

Getting to a Mill Hill survey

Surveyors travel to NW7 addresses from the studio; the nearest stations are Mill Hill East, Edgware, Finsbury Park station. Appointments are booked in Mill Hill on weekdays and Saturdays, and the measured survey of a standard georgian villas takes two to three hours.

Where Mill Hill sits

Mill Hill lies 9 miles (14 km) northwest of Charing Cross, on Ordnance Survey grid reference TQ225925. We draw the Mill Hill location and block plans from that reference, which is what Barnet Council validates against. Source.

Practical detail for a Mill Hill submission: Mill Hill East and Edgware and Finsbury Park station cover the NW7 area; London is the post town on Mill Hill addresses; dialling code 020. Site plans are drawn to the address as Barnet Council holds it.

Mill Hill postcode coverage

Districts covered around Mill Hill: NW7 (Mill Hill), which Mill Hill holds on its own.

Streets and stations in Mill Hill

Graham Hill, Damon Hill, Holders Hill and Mill Hill Park are typical of the Mill Hill streets we draw. most Mill Hill sites are within walking distance of Mill Hill East or Edgware or Finsbury Park station.

Areas we cover around Mill Hill

Neighbouring coverage runs to Hornsey (N8), Wood Green (N22), Enfield Town (EN1, EN2), Palmers Green (N13), Winchmore Hill (N21), Southgate (N14); the Barnet policy is shared but the stock and the designations are not.

What moves the number on a Mill Hill job is the georgian villas itself — party walls, level changes, and whether Mill Hill pulls a heritage statement into scope.

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.

On a Mill Hill submission the statutory element is London Borough of Barnet's, not ours. London planning approval-rate dataset · Barnet planning · House Extension Drawings London-wide · house extension drawings in Hornsey.

Your Mill Hill drawings are produced under professional charter, not subcontracted out and rubber-stamped. A tight Mill Hill plot — Mill Hill Village in the setting, a shared flank wall on NW7 — goes to Barnet Council for advice before it goes to determination.

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.

Send us the Mill Hill address and we will confirm the route before you commit. This Mill Hill page was reviewed in August 2026.