Muswell Hill — covered by Haringey Council.
Planning permission drawings delivered by an MCIAT chartered team.
Building regulations drawings delivered by an MCIAT chartered team.
Loft conversion drawings delivered by an MCIAT chartered team.
House extension drawings delivered by an MCIAT chartered team.
Mansard roof extensions delivered by an MCIAT chartered team.
Garage conversion drawings delivered by an MCIAT chartered team.
Basement conversion drawings delivered by an MCIAT chartered team.
Structural calculations delivered by an MCIAT chartered team.
Measured building survey delivered by an MCIAT chartered team.
Party wall services delivered by an MCIAT chartered team.
Rear dormer drawings delivered by an MCIAT chartered team.


N10 primarily covers Muswell Hill in Haringey. It also touches Barnet.
Decisions for N10 are made by Haringey Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Haringey: Yes.
Building regs from £950. We do not charge hourly. Free site survey across all N10 addresses.
From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Haringey Council timelines align with the national norm.
Muswell Hill in N10 is characterised by the housing stock of Haringey — broadly edwardian terraces in crouch end, muswell hill.

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Every N10 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. N10 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| N10 | Muswell Hill | Edwardian villas, 1930s semi-detached | Muswell Hill is split at N10. Either Haringey Council or Barnet Council can determine a drawing package here, so the N10 address is checked against both policies maps first. |
| N10 | Muswell Hill (Haringey) | Edwardian villas, 1930s semi-detached | Muswell Hill (Haringey) sits inside N10; drawing package proposals here are determined by Haringey Council. |
| N4 | Finsbury Park / Stroud Green | Victorian terraces, post-war estates | Adjoining district to N10, also inside Haringey for drawing package purposes. |
| N8 | Crouch End / Hornsey | Edwardian terraces, Victorian villas | Adjoining district to N10, also inside Haringey for drawing package purposes. |
| N15 | Seven Sisters / South Tottenham | Victorian terraces, post-war estates | Adjoining district to N10, also inside Haringey for drawing package purposes. |
| N2 | East Finchley | Edwardian terraces, 1930s semi-detached | Adjoining district to N10, also inside Barnet for drawing package purposes. |
| N3 | Finchley Central | 1930s semi-detached, Edwardian villas | Adjoining district to N10, also inside Barnet for drawing package purposes. |
| N11 | New Southgate / Bounds Green | mixed stock | Adjoining district to N10, also inside Barnet for drawing package purposes. |
| N12 | North Finchley / Woodside Park | 1930s semi-detached, Edwardian villas | Adjoining district to N10, also inside Barnet for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few N10 streets, and each one changes what a drawing package can achieve at that address.
Conservation areas covering N10 (Muswell Hill): Haringey Council runs 29, and Bruce Castle, Highgate Village, Muswell Hill are the ones N10 (Muswell Hill) owners meet most. A drawing package inside a N10 (Muswell Hill) conservation area loses permitted development, so the N10 (Muswell Hill) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Bruce Castle a drawing package is judged on the street elevation first.
N10 (Muswell Hill) and Article 4: Borough-wide Article 4 for HMO conversions. A drawing package planned at a N10 address is checked against that direction first; Haringey Council publishes the N10 (Muswell Hill) extent, and the N10 line rarely follows the N10 (Muswell Hill) boundary you would expect.
What N10 (Muswell Hill) is built from: Edwardian terraces in Crouch End, Muswell Hill; Victorian two-up-two-downs in Harringay Ladder; 1930s semi-detached in Muswell Hill; post-war in Tottenham. Muswell Hill and Crouch End have strong conservation coverage with clear loft/mansard precedents; Tottenham generally permissive. That mix decides the drawing package route in N10 (Muswell Hill) more than the postcode does, and it is what a Haringey Council case officer reads first. A householder application costs £548 paid to Haringey Council direct, with 8 weeks to a decision once validated.
Conservation areas covering N10 (Muswell Hill): Barnet Council runs 20, and Monken Hadley, Hampstead Garden Suburb, Mill Hill are the ones N10 (Muswell Hill) owners meet most. A drawing package inside a N10 (Muswell Hill) conservation area loses permitted development, so the N10 (Muswell Hill) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Monken Hadley a drawing package is judged on the street elevation first.
N10 (Muswell Hill) permitted development status: there is no borough-wide direction from Barnet Council, so a drawing package at a N10 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a N10 (Muswell Hill) sale to argue it later.
What N10 (Muswell Hill) is built from: 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. That mix decides the drawing package route in N10 (Muswell Hill) more than the postcode does, and it is what a Barnet Council case officer reads first. A householder application costs £548 paid to Barnet Council direct, with 8 weeks to a decision once validated.
Sources for this N10 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.
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