Architectural drawings in N20

Which N20 postcodes does this drawing package service cover?

Every N20 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. N20 fees below are the statutory England rates for 2026, not drawing package estimates.

What changes about a drawing package in each part of N20?

Roof pitch, wall build-up and plot depth change every few N20 streets, and each one changes what a drawing package can achieve at that address.

• Inside N20: Whetstone (N20) — drawing package work in Whetstone means 1930s semi-detached, edwardian villas. Whetstone is 1930s semi-detached, Edwardian villas. Barnet Council decides the Whetstone application, and Totteridge & Whetstone anchors the Whetstone location plan.
• Bordering N20: Finchley (N3, N12) — 1930s semi-detached, Edwardian villas defines Finchley, where 1930s semi-detached, edwardian villas set what a drawing package can do. Any Finchley drawing package is validated by Barnet Council, with Finchley Central the usual Finchley reference point on the site plan.
• Bordering N20: Hampstead Garden Suburb (NW11) — a drawing package in Hampstead Garden Suburb starts from arts & crafts houses, edwardian villas, and Hampstead Garden Suburb reads as Arts & Crafts garden suburb, conservation. in NW11. Barnet Council assesses Hampstead Garden Suburb architectural drawings against its own Hampstead Garden Suburb character guidance, and the location plan we draw for Hampstead Garden Suburb references Central Square.
• Bordering N20: Golders Green (NW11) — a drawing package in Golders Green starts from edwardian villas, 1930s semi-detached, and Golders Green reads as Edwardian and 1930s semi-detached. in NW11. Barnet Council assesses Golders Green architectural drawings against its own Golders Green character guidance, and the location plan we draw for Golders Green references Golders Green Hippodrome.
• Bordering N20: Muswell Hill (N10) — Edwardian villas and terraces defines Muswell Hill, where edwardian villas, 1930s semi-detached set what a drawing package can do. Any Muswell Hill drawing package is validated by Barnet Council, with Alexandra Palace the usual Muswell Hill reference point on the site plan.
• Bordering N20: Hendon (NW4) — drawing package work in Hendon means 1930s semi-detached, post-war flats. Hendon is 1930s semi-detached, post-war flats. Barnet Council decides the Hendon application, and RAF Museum anchors the Hendon location plan.
• Bordering N20: Mill Hill (NW7) — a drawing package in Mill Hill starts from georgian villas, 1930s detached and semi-detached, and Mill Hill reads as Georgian and 1930s detached. in NW7. Barnet Council assesses Mill Hill architectural drawings against its own Mill Hill character guidance, and the location plan we draw for Mill Hill references Mill Hill Village.
• Bordering N20: Edgware (HA8) — a drawing package in Edgware starts from 1930s semi-detached, post-war flats, and Edgware reads as 1930s semi-detached, post-war flats. in HA8. Barnet Council assesses Edgware architectural drawings against its own Edgware character guidance, and the location plan we draw for Edgware references Edgware Tube.
• Bordering N20: Colindale (NW9) — post-war flats, new-build defines Colindale, where post-war flats, new-build set what a drawing package can do. Any Colindale drawing package is validated by Barnet Council, with Colindale station the usual Colindale reference point on the site plan.
• Bordering N20: East Finchley (N2) — a drawing package in East Finchley starts from edwardian terraces, 1930s semi-detached, and East Finchley reads as Edwardian terraces, 1930s semi-detached. in N2. Barnet Council assesses East Finchley architectural drawings against its own East Finchley character guidance, and the location plan we draw for East Finchley references Phoenix Cinema.

What local planning policy applies to a drawing package in N20?

Conservation areas covering N20 (Whetstone / Totteridge): Barnet Council runs 20, and Monken Hadley, Hampstead Garden Suburb, Mill Hill are the ones N20 (Whetstone / Totteridge) owners meet most. A drawing package inside a N20 (Whetstone / Totteridge) conservation area loses permitted development, so the N20 (Whetstone / Totteridge) 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 N20 (Whetstone / Totteridge) drawing package: Barnet Council has made no borough-wide direction, so permitted development for a drawing package in N20 (Whetstone / Totteridge) generally survives outside N20 (Whetstone / Totteridge) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a N20 owner records that a drawing package was lawful.

N20 (Whetstone / Totteridge) 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. Suburban outer-London borough; permitted development used heavily; Hampstead Garden Suburb has its own residents' trust with additional design controls. Read that before choosing a drawing package route in N20 (Whetstone / Totteridge) — construction, not postcode, sets what is achievable. Barnet Council charges £548 for a householder application and has 8 weeks to determine it.

Who decides a drawing package on the edge of N20?

• Enfield — adjoining N20 (Whetstone / Totteridge), with 22 conservation areas centred on EN1. A drawing package on the far side of the N20 (Whetstone / Totteridge) line is determined by Enfield Council, so the N20 (Whetstone / Totteridge) quote for architectural drawings is checked against Enfield guidance before it is issued.
• Harrow — adjoining N20 (Whetstone / Totteridge), with 29 conservation areas centred on HA1. A drawing package on the far side of the N20 (Whetstone / Totteridge) line is determined by Harrow Council, so the N20 (Whetstone / Totteridge) quote for architectural drawings is checked against Harrow guidance before it is issued.
• Brent — adjoining N20 (Whetstone / Totteridge), with 22 conservation areas centred on NW2. A drawing package on the far side of the N20 (Whetstone / Totteridge) line is determined by Brent Council, so the N20 (Whetstone / Totteridge) quote for architectural drawings is checked against Brent guidance before it is issued.
• Camden — cross the N20 (Whetstone / Totteridge) boundary and Camden Council takes the drawing package instead, applying 40 conservation areas of its own around NW1. We re-price architectural drawings at the N20 (Whetstone / Totteridge) edge because Camden policy and Barnet policy rarely align on drawing package depth.

Sources for this N20 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.