Loft Conversion Drawings in Whetstone | From £1,225

No Article 4 Direction covers Barnet, which keeps the Whetstone permitted-development route open on unlisted houses. The fabric of Whetstone is 1930s semi-detached, Edwardian villas, so a N20 proposal is judged on fit before it is judged on size. Where a Whetstone property sits inside Mill Hill or Hendon — two of Barnet's 20 designations — permitted development narrows and a full Barnet Council submission is usually quicker. Every Whetstone enquiry starts with that check.

The Whetstone Article 4 position is established at survey, before design. The 1930s semi-detached governs the numbers on a Whetstone site: rear wall, eaves, and how far a ridge can rise beside Totteridge & Whetstone. The borough policy layer over every N20 address is set out on Barnet planning. The Whetstone survey then carries into house extension drawings in Whetstone if the project runs on to construction.

One to two weeks at London Borough of Barnet before a Whetstone case reaches an officer. The first visit to Whetstone is a measured survey — every room, every opening, every level change recorded on site.

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.

We monitor the N20 case and respond to officer queries during the period. You get the full Whetstone set as PDFs, plus CAD on request.

London Borough of Barnet weighs material objections only — a Whetstone neighbour disliking the design is not one. The Whetstone existing set is accurate to the millimetre where it matters.

The party wall step is not optional on shared Whetstone walls, and serving late is what stalls sites. Once consent is granted, architectural drawings follows for the N20 property.

Whetstone is characterised by 1930s semi-detached, edwardian villas, concentrated across N20 in the Whetstone / Totteridge area. On Whetstone streets the 1930s semi-detached sets the structural sequence — what can be opened up, where the load goes, how deep you can build. Where Whetstone is concerned, edwardian roofs run deeper front-to-back, so an L-shaped dormer over the back addition usually yields a second bedroom as well as the shower room. In N20 that determines the depth we can draw. The blocks around Totteridge & Whetstone set the prevailing eaves and ridge lines, and Barnet Council officers reference that rhythm when assessing height and massing on a Whetstone street.

Barnet sets no special basement rule, so a Whetstone lower-ground scheme stands or falls on the engineering and the neighbours. A Whetstone survey done once feeds planning permission for N20 properties and building regulations drawings later.

What the Whetstone drawing pack contains

The Whetstone pack below is what Barnet Council and a builder both need.

• existing roof plan and section for the Whetstone property
• proposed dormer elevations
• volume calculation sheet
• staircase and head-height sections
• structural steel layout

Local landmarks that shape a Whetstone application

• Brunswick Park — gardens deep enough for the 8 weeks householder route on a Brunswick Park plot.
• Oakleigh Park — gardens deep enough for the 8 weeks householder route on a Oakleigh Park plot.
• Woodside Park — gardens deep enough for the 8 weeks householder route on a Woodside Park plot.
• Totteridge & Whetstone — schemes visible from it get closer scrutiny in Barnet.

Getting to a Whetstone survey

Surveyors travel to N20 addresses from the studio; the nearest stations are Totteridge and Whetstone, Oakleigh Park. Appointments are booked in Whetstone on weekdays and Saturdays, and the measured survey of a standard 1930s semi-detached takes two to three hours.

Where Whetstone sits

on Ordnance Survey grid reference TQ265935. That is the reference the Whetstone site plan is drawn over. Source.

Practical detail for a Whetstone submission: Totteridge and Whetstone and Oakleigh Park serve the area; post town LONDON; dialling code 020. Site plans are drawn to the address as Barnet Council holds it.

Whetstone postcode coverage

From N20 (Whetstone / Totteridge), which Whetstone holds on its own, the Whetstone process is the same but the constraints are not.

Streets and stations in Whetstone

Work in Whetstone clusters around Brunswick Park, Oakleigh Park and Woodside Park. most Whetstone sites are within walking distance of Totteridge and Whetstone or Oakleigh Park.

Areas we cover around Whetstone

Besides Whetstone: Stroud Green (N4), Hornsey (N8), Wood Green (N22), Enfield Town (EN1, EN2), Palmers Green (N13), Winchmore Hill (N21), plus Brent across the border.

A Whetstone quote moves on what the building is, not on how long we spend: the 1930s semi-detached, the party wall position, the Mill Hill question.

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.

We invoice the drawings only; London Borough of Barnet takes the statutory fee from the Whetstone applicant. London planning approval-rate dataset · Barnet planning · loft conversion drawings in London · loft conversion drawings in Stroud Green.

MCIAT chartered technologists handle every N20 submission we make. For difficult Whetstone sites — anything in Mill Hill, anything overlooking Totteridge & Whetstone — 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.

We survey Whetstone properties within a few days of instruction. This Whetstone page was reviewed in August 2026.