Building Regulations Drawings in South Harrow |

No Article 4 Direction covers Harrow, which keeps the South Harrow permitted-development route open on unlisted houses. The character of South Harrow is the yardstick a Harrow Council officer measures a scheme against: 1930s semi-detached. Conservation status changes the South Harrow route entirely — Harrow on the Hill being the usual case among the 29 designations in Harrow. Every South Harrow enquiry starts with that check.

Every HA2 job starts with checking Article 4 directions street by street. The 1930s semi-detached governs the numbers on a South Harrow site: rear wall, eaves, and how far a ridge can rise beside South Harrow Tube. The borough policy layer over every HA2 address is set out on Harrow planning. The South Harrow survey then carries into house extension drawings in South Harrow if the project runs on to construction.

Most South Harrow 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. The first thing we do in South Harrow is measure — every room, every level change.

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.

Neighbour consultation on a South Harrow case runs 21 days from registration. Nothing leaves for a South Harrow address until it matches the local validation checklist.

Comments on a South Harrow application are visible on the London Borough of Harrow portal. Everything drawn for a HA2 address traces back to a measurement taken on site.

Shared walls are the norm in South Harrow; the notice period is not optional. Once consent is granted, architectural drawings follows for the HA2 property.

South Harrow is characterised by 1930s semi-detached, concentrated across HA2 in the North Harrow / South Harrow area. The 1930s semi-detached across South Harrow decides how a scheme is built, not just how it looks. For a typical South Harrow house, 1930s cavity walls here take standard full-fill or partial-fill detailing, which keeps the Part L calculation straightforward. That is drawn out in the South Harrow proposed section. Ridge and eaves lines along South Harrow streets are the reference Harrow Council uses.

Lower-ground schemes in South Harrow answer to neighbours and groundwater. A South Harrow survey done once feeds planning permission for HA2 properties and loft conversion drawings later.

What the South Harrow drawing pack contains

What we hand over for a South Harrow property:

• construction floor plans for the South Harrow property
• sections at 1:50
• Part A structural notes
• Part L thermal build-ups
• Part B fire and escape strategy

Local landmarks that shape a South Harrow application

• Rayners Lane — side returns where the 45-degree amenity test decides how far a Rayners Lane extension goes.
• High Street — shared flank walls, so High Street party structure notices go out before work starts.
• Sudbury Hill — shared flank walls, so Sudbury Hill party structure notices go out before work starts.
• South Harrow Tube — a South Harrow roof extension is judged against the datum it sets.
• Whitmore High School — massing on adjoining HA2 plots is tested against it.

Getting to a South Harrow survey

Surveyors travel to HA2 addresses from the studio; the nearest stations are South Harrow, Northolt Park. Appointments are booked in South Harrow on weekdays and Saturdays, and the measured survey of a standard 1930s semi-detached takes two to three hours.

Where South Harrow sits

on Ordnance Survey grid reference TQ143863, inside the Harrow West parliamentary constituency. Location and block plans for South Harrow start from that grid square. Source.

Practical detail for a South Harrow submission: South Harrow and Northolt Park serve the area; Royal Mail routes it as HARROW; dialling code 020. Site plans are drawn to the address as Harrow Council holds it.

South Harrow postcode coverage

South Harrow work spans HA2 (North Harrow / South Harrow), shared with North Harrow — the designations change with the district line.

Streets and stations in South Harrow

Work in South Harrow clusters around Rayners Lane, High Street and Sudbury Hill. most South Harrow sites are within walking distance of South Harrow or Northolt Park.

Areas we cover around South Harrow

South Harrow sits in a patch that also takes in Finchley (N3, N12), Hampstead Garden Suburb (NW11), Golders Green (NW11), Muswell Hill (N10), Hendon (NW4), Mill Hill (NW7), and we work all of it as far as the Hillingdon boundary.

The variables on a HA2 job are structural: party walls, floor levels, and whether the Harrow on the Hill designation adds a heritage statement.

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 South Harrow application is lodged. London planning approval-rate dataset · Harrow planning · Building Regulations Drawings London-wide · building regulations drawings in Finchley.

The technologist who surveys your South Harrow property signs the drawings. For difficult South Harrow sites — anything in Harrow on the Hill, anything overlooking South Harrow Tube — the pre-application route is cheap insurance.

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.

The first step for a South Harrow owner is a measured survey, not a design. This South Harrow page was reviewed in August 2026.