House Extension Drawings in Stanmore |

No Article 4 Direction covers Harrow, which keeps the Stanmore permitted-development route open on unlisted houses. The Stanmore setting is 1930s semi-detached, Green Belt fringe, which shapes what passes near Stanmore Tube. Where a Stanmore property sits inside Harrow on the Hill or Pinner Village — two of Harrow's 29 designations — permitted development narrows and a full Harrow Council submission is usually quicker. Conservation status is checked against the Stanmore address before design.

Article 4 directions are checked street by street in Stanmore; the borough-wide answer is rarely the whole answer. A Stanmore survey establishes the 1930s semi-detached dimensions that decide the scheme — original rear wall, floor levels, and ridge height against Stanmore Tube. The borough policy layer over every HA7 address is set out on Harrow planning. The Stanmore survey then carries into loft conversion drawings in Stanmore if the project runs on to construction.

Most Stanmore delay happens before the clock starts: London Borough of Harrow takes one to two weeks to validate, and an incomplete pack goes to the back of the queue. Step one at a HA7 address is a full measured survey of the existing building.

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.

Amendments during the Stanmore determination are handled without a resubmission where possible. Nothing leaves for a Stanmore address until it matches the local validation checklist.

A HA7 objection about light or overlooking carries more weight than one about taste. We photograph the Stanmore property alongside the measurements for the record.

Shared walls are the norm in Stanmore; the notice period is not optional. Once consent is granted, architectural drawings follows for the HA7 property.

Stanmore is characterised by 1930s semi-detached, edwardian villas, concentrated across HA7 in the Stanmore area. What the 1930s semi-detached in Stanmore allows is a construction question first and a planning question second, and the survey answers it. Applied to HA7 property: edwardian plots here are wider, so a wraparound picking up both the side return and the rear is normally achievable within the 4 m detached / 3 m attached limits. On a Stanmore terrace it governs the rear opening width. The blocks around Stanmore Tube set the prevailing eaves and ridge lines, and Harrow Council officers reference that rhythm when assessing height and massing on a Stanmore street.

Subterranean HA7 work needs a structural case as much as a planning one. Survey once, use it for every HA7 submission that follows.

What the Stanmore drawing pack contains

Here is what a HA7 instruction actually produces.

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

Streets and landmarks we survey around Stanmore

• Bletchley Park — front-to-back level changes that drive the Bletchley Park section drawings.
• Watling Street — roof profiles that set the ridge datum Harrow Council measures a Watling Street dormer against.
• Canons Park — terraced rear elevations — the Canons Park party wall position is drawn first.
• Stanmore Country Park — frontages visible from the highway, so Harrow on the Hill materials detail governs the Stanmore Country Park elevation.
• Stanmore Tube — a Stanmore roof extension is judged against the datum it sets.
• Stanmore Common — Harrow Council weighs HA7 sightlines to it in the character assessment.
• Royal National Orthopaedic Hospital — it fixes the local datum a Stanmore roof extension is judged against.
• Royal National Orthopedic Hospital — the surrounding 1930s semi-detached takes its scale from it.
• Bentley Wood High School — the surrounding 1930s semi-detached takes its scale from it.

Getting to a Stanmore survey

Surveyors travel to HA7 addresses from the studio; the nearest stations are Stanmore, File:Stanmore Village, Stanmore Village, File:Stanmore. Appointments are booked in Stanmore on weekdays and Saturdays, and the measured survey of a standard 1930s semi-detached takes two to three hours.

Where Stanmore sits

Stanmore lies 11 miles (18 km) northwest of Charing Cross, on Ordnance Survey grid reference TQ1691. Location and block plans for Stanmore start from that grid square. Source.

Practical detail for a Stanmore submission: Stanmore and File:Stanmore Village and Stanmore Village and File:Stanmore serve the area; HA7 addresses are written to STANMORE; dialling code 020. Site plans are drawn to the address as Harrow Council holds it.

Stanmore postcode coverage

Stanmore work spans HA7 (Stanmore), which Stanmore holds on its own — the designations change with the district line.

Streets and stations in Stanmore

Stanmore addresses we have drawn run to Bletchley Park, Watling Street, Canons Park and Stanmore Country Park. most Stanmore sites are within walking distance of Stanmore or File:Stanmore Village or Stanmore Village.

Areas we cover around Stanmore

Beyond Stanmore we cover North Harrow (HA2), South Harrow (HA2), Uxbridge (UB8), Ruislip (HA4), Northwood (HA6), Hayes (UB3, UB4), and cross into Brent. A consent granted a mile from Stanmore Tube is not a precedent for the plot next to it.

What moves the number on a Stanmore job is the 1930s semi-detached itself — party walls, level changes, and whether Harrow on the 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.

That charge is London Borough of Harrow's, taken when the Stanmore application is lodged. London planning approval-rate dataset · Harrow planning · our London house extension drawings service · house extension drawings in North Harrow.

Stanmore work is issued under MCIAT charter, the technical-design and building-regulations qualification. Where a Stanmore case is borderline — a corner plot near Stanmore Tube, a Harrow on the Hill frontage, a flank wall hard onto a HA7 neighbour — we buy pre-application advice from Harrow Council rather than gamble the statutory 8 weeks.

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 Stanmore project does not need us. This Stanmore page was reviewed in August 2026.