Planning drawings, building regulations, loft conversions, house extensions and mansards — delivered across Barnet by MCIAT chartered technologists with deep knowledge of Barnet Council's policies.
A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...
Every loft type across every Barnet roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...
Barnet's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...
Turn your unused Barnet garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...
Full architectural technology service for basement digs and cellar conversions in Barnet — structural underpinning design, waterproofing...
Chartered structural engineer calculations for every residential intervention in Barnet — steel beams, lintels, pad foundations, wall re...
Measured surveys across Barnet — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...
End-to-end Party Wall Act 1996 service for Barnet — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Barnet property,...


Housing stock: 1930s semi-detached dominates; Edwardian villas in Muswell Hill, Finchley; Garden Suburb Arts & Crafts in Hampstead Garden Suburb; post-war flats in Colindale.
Character: Suburban outer-London borough; permitted development used heavily; Hampstead Garden Suburb has its own residents' trust with additional design controls.
Notable conservation areas: Hampstead Garden Suburb, Mill Hill, Hendon, Golders Green, Monken Hadley

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...
Every loft type across every Barnet roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...
Barnet's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...
Turn your unused Barnet garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...
Full architectural technology service for basement digs and cellar conversions in Barnet — structural underpinning design, waterproofing...
Chartered structural engineer calculations for every residential intervention in Barnet — steel beams, lintels, pad foundations, wall re...
Measured surveys across Barnet — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...
End-to-end Party Wall Act 1996 service for Barnet — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Barnet property,...
Leave your number and an Architectural technologist covering Barnet will call you back within 30 minutes during working hours.

Every Barnet postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. Barnet fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| N20 | Whetstone / Totteridge | 1930s semi-detached, Edwardian villas | A drawing package at an N20 address in Whetstone / Totteridge is determined by Barnet Council under its own Local Plan policies for Whetstone / Totteridge. |
| NW4 | Hendon | 1930s semi-detached, post-war flats | NW4 covers Hendon only; Barnet Council handles the drawing package, and Hendon case officers apply the NW4 conservation-area map. |
| NW7 | Mill Hill | Georgian villas, 1930s detached and semi-detached | A drawing package at an NW7 address in Mill Hill is determined by Barnet Council under its own Local Plan policies for Mill Hill. |
| NW9 | Colindale / Kingsbury | Post-war flats, new-build | Colindale / Kingsbury is split at NW9. Either Barnet Council or Brent Council can determine a drawing package here, so the NW9 address is checked against both policies maps first. |
| NW11 | Golders Green / Hampstead Garden Suburb | Arts & Crafts houses, Edwardian villas | A drawing package at an NW11 address in Golders Green / Hampstead Garden Suburb is determined by Barnet Council under its own Local Plan policies for Golders Green / Hampstead Garden Suburb. |
| EN4 | East Barnet / Cockfosters | 1930s semi-detached dominates; Edwardian villas in Muswell Hill | EN4 straddles a boundary: East Barnet / Cockfosters addresses fall to Barnet Council or Enfield Council, so confirm which authority validates the drawing package before submitting EN4 drawings. |
| EN5 | Barnet / Arkley | Georgian fragments, 1930s semi-detached | EN5 covers Barnet / Arkley only; Barnet Council handles the drawing package, and Barnet / Arkley case officers apply the EN5 conservation-area map. |
| HA8 | Edgware / Burnt Oak | 1930s semi-detached, post-war flats | Edgware / Burnt Oak sits wholly inside HA8, so Barnet Council validates every drawing package submitted from an HA8 address. |
Roof pitch, wall build-up and plot depth change every few Barnet streets, and each one changes what a drawing package can achieve at that address.
Conservation areas covering Barnet: Barnet Council runs 20, and Hampstead Garden Suburb, Mill Hill, Hendon are the ones Barnet owners meet most. A drawing package inside a Barnet conservation area loses permitted development, so the Barnet submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Golders Green a drawing package is judged on the street elevation first.
Article 4 and your Barnet drawing package: Barnet Council has made no borough-wide direction, so permitted development for a drawing package in Barnet generally survives outside Barnet conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a N2 owner records that a drawing package was lawful.
The building fabric around Barnet: 1930s semi-detached dominates; Edwardian villas in Muswell Hill, Finchley; Garden Suburb Arts & Crafts in Hampstead Garden Suburb; post-war flats in Colindale. Suburban outer-London borough; permitted development used heavily; Hampstead Garden Suburb has its own residents' trust with additional design controls. A drawing package in Barnet is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Barnet Council.
Sources for this Barnet drawing package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
Over the 12 quarters from 2023 Q2 to 2026 Q1, Barnet decided 4,584 householder planning applications and approved 83.5% of them — 0.5 percentage points above the London average of 83%. That places Barnet 16th of 32 London boroughs on householder approval rate. These are decisions the council reported to MHCLG, not our own sample.
| Measure | Barnet | Context |
|---|---|---|
| Householder applications decided | 4,584 | 77,680 across London |
| Householder approval rate | 83.5% | 83% London average |
| Decided within 8 weeks | 91.8% | 18th fastest of 32 boroughs |
| Took longer than 13 weeks | 3.0% | the applications that overran the statutory target |
| Minor dwellings approval rate | 57.7% | new-build and conversion schemes under 10 units |
| All application types | 78.4% | across 8,047 decisions |
| Certificates of lawfulness issued | 2,585 | confirmations that work was permitted development |
Speed matters as much as the odds. Barnet decided 91.8% of householder applications inside the eight-week statutory period and let 3.0% run past thirteen weeks. A drawing package that is complete and correctly described at validation is the part of that timeline you control; the rest belongs to the council's caseload.
Source: MHCLG District Planning Application Statistics (PS1 and PS2), 2023 Q2 to 2026 Q1, published quarterly by the Ministry of Housing, Communities and Local Government. Counts are decisions made in the window, not applications submitted. Contains public sector information licensed under the Open Government Licence v3.0.
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Get my free quote →We've delivered architectural drawings across every part of Barnet. Each neighbourhood has its own conservation context and dominant housing stock — click through for area-specific guidance.