Building Regulations Drawings in Whetstone (N20)

Which N20 postcodes does this building regulations package service cover?

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

How does a building regulations package differ street by street across N20?

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

• Inside N20: Whetstone (N20) — a building regulations package in Whetstone starts from 1930s semi-detached, edwardian villas, and Whetstone reads as 1930s semi-detached, Edwardian villas. Edwardian houses here are usually early cavity or solid wall in N20. Barnet Council assesses Whetstone building regulations drawings against its own Whetstone character guidance, and the location plan we draw for Whetstone references Totteridge & Whetstone.
• Bordering N20: Finchley (N3, N12) — a building regulations package in Finchley starts from 1930s semi-detached, edwardian villas, and Finchley reads as 1930s semi-detached, Edwardian villas. Edwardian houses here are usually early cavity or solid wall in N3. Barnet Council assesses Finchley building regulations drawings against its own Finchley character guidance, and the location plan we draw for Finchley references Finchley Central.
• Bordering N20: Hampstead Garden Suburb (NW11) — Arts & Crafts garden suburb, conservation defines Hampstead Garden Suburb, where arts & crafts houses, edwardian villas set what a building regulations package can do. Edwardian houses here are usually early cavity or solid wall across NW11. Any Hampstead Garden Suburb building regulations package is validated by Barnet Council, with Central Square the usual Hampstead Garden Suburb reference point on the site plan.
• Bordering N20: Golders Green (NW11) — building regulations package work in Golders Green means edwardian villas, 1930s semi-detached. Golders Green is Edwardian and 1930s semi-detached. Edwardian houses here are usually early cavity or solid wall throughout NW11. Barnet Council decides the Golders Green application, and Golders Green Hippodrome anchors the Golders Green location plan.
• Bordering N20: Muswell Hill (N10) — a building regulations package in Muswell Hill starts from edwardian villas, 1930s semi-detached, and Muswell Hill reads as Edwardian villas and terraces. Edwardian houses here are usually early cavity or solid wall in N10. Barnet Council assesses Muswell Hill building regulations drawings against its own Muswell Hill character guidance, and the location plan we draw for Muswell Hill references Alexandra Palace.
• Bordering N20: Hendon (NW4) — 1930s semi-detached, post-war flats defines Hendon, where 1930s semi-detached, post-war flats set what a building regulations package can do. 1930s cavity walls here take standard full-fill or partial-fill detailing across NW4. Any Hendon building regulations package is validated by Barnet Council, with RAF Museum the usual Hendon reference point on the site plan.
• Bordering N20: Mill Hill (NW7) — a building regulations package in Mill Hill starts from georgian villas, 1930s detached and semi-detached, and Mill Hill reads as Georgian and 1930s detached. Georgian solid walls here cannot take standard cavity detailing in NW7. Barnet Council assesses Mill Hill building regulations 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) — 1930s semi-detached, post-war flats defines Edgware, where 1930s semi-detached, post-war flats set what a building regulations package can do. 1930s cavity walls here take standard full-fill or partial-fill detailing across HA8. Any Edgware building regulations package is validated by Barnet Council, with Edgware Tube the usual Edgware reference point on the site plan.
• Bordering N20: Colindale (NW9) — post-war flats, new-build defines Colindale, where post-war flats, new-build set what a building regulations package can do. Post-war concrete frames here need a Part B fire strategy that addresses the existing compartmentation across NW9. Any Colindale building regulations package is validated by Barnet Council, with Colindale station the usual Colindale reference point on the site plan.
• Bordering N20: East Finchley (N2) — building regulations package work in East Finchley means edwardian terraces, 1930s semi-detached. East Finchley is Edwardian terraces, 1930s semi-detached. Edwardian houses here are usually early cavity or solid wall throughout N2. Barnet Council decides the East Finchley application, and Phoenix Cinema anchors the East Finchley location plan.

How do conservation areas and Article 4 affect a building regulations package in N20?

Conservation areas covering N20 (Whetstone / Totteridge): Barnet Council runs 20, and Mill Hill, Hendon, Golders Green are the ones N20 (Whetstone / Totteridge) owners meet most. A building regulations 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 building regulations package is judged on the street elevation first.

Article 4 and your N20 (Whetstone / Totteridge) building regulations package: Barnet Council has made no borough-wide direction, so permitted development for a building regulations 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 building regulations 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 building regulations 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.

What happens if a N20 property sits on a boundary?

• Camden — the Camden boundary runs against Barnet, so a building regulations package a street from N20 (Whetstone / Totteridge) is decided by Camden Council instead. Camden runs 40 conservation areas across NW1 and its neighbours, which is why building regulations drawings priced for N20 (Whetstone / Totteridge) are re-checked against Camden policy whenever the N20 (Whetstone / Totteridge) address sits on that edge.
• Haringey — the Haringey boundary runs against Barnet, so a building regulations package a street from N20 (Whetstone / Totteridge) is decided by Haringey Council instead. Haringey runs 29 conservation areas across N4 and its neighbours, which is why building regulations drawings priced for N20 (Whetstone / Totteridge) are re-checked against Haringey policy whenever the N20 (Whetstone / Totteridge) address sits on that edge.
• Enfield — cross the N20 (Whetstone / Totteridge) boundary and Enfield Council takes the building regulations package instead, applying 22 conservation areas of its own around EN1. We re-price building regulations drawings at the N20 (Whetstone / Totteridge) edge because Enfield policy and Barnet policy rarely align on building regulations package depth.
• Harrow — cross the N20 (Whetstone / Totteridge) boundary and Harrow Council takes the building regulations package instead, applying 29 conservation areas of its own around HA1. We re-price building regulations drawings at the N20 (Whetstone / Totteridge) edge because Harrow policy and Barnet policy rarely align on building regulations package depth.

Sources for this N20 building regulations 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.