House extension drawings in Muswell Hill
Haringey decides a house extension in Muswell Hill, and 90% of the 689 householder applications it decided in the four quarters to 2026 Q2 were granted (our analysis of MHCLG planning application statistics, table PS2). The first check is your road's conservation area status. Our N10 rear extension drawings start from £695.
Fixed fee from £495 drawings + £200 survey (£695 total) · all prices
Prefer to talk it through?
Check for a conservation area before you sketch
The national register lists 33 conservation-area entries for Haringey (our analysis of the MHCLG Planning Data Platform conservation-area dataset). The register may not match the council's list, so look at Haringey's own conservation area map with your address in hand.
Inside one, the council reads an extension against the street: materials, roof shape, the view from the road. Permitted development is also narrower there. Our conservation area extension rules guide sets out what changes, and the glossary entry defines the term.
The 3 and 6 metre rear limits
A house that is not detached may have a single-storey rear extension of up to 3 metres under Class A of Part 1, Schedule 2 of the General Permitted Development Order 2015, in a conservation area or not, unless an Article 4 direction has removed the right. Outside a conservation area it can go to 6 metres through prior approval (legislation.gov.uk).
In the eight quarters from 2024 Q3 to 2026 Q2, Haringey determined 60 larger home extension prior approvals and granted 30% (our analysis of MHCLG planning application statistics, table PS1). Those are past results, and the sample is modest, but they say the 6 metre route should be designed carefully.
In the eight quarters from 2024 Q3 to 2026 Q2, Haringey determined 60 larger home extension prior approvals and granted 30% (our analysis of MHCLG planning application statistics, table PS1).
Neighbours, daylight and the appeals record
Neighbours near Fortis Green and elsewhere in N10 can object about daylight or outlook, and an extension needs to be drawn with that in mind. The council weighs the effect on adjoining homes, and the drawings carry the evidence: the depth, the height at the boundary and where the neighbour's windows sit.
The Planning Inspectorate decided 143 householder appeals for Haringey between 2021 and 2026 and allowed 35% (our analysis of the Planning Inspectorate Casework Database, release 2609). A daylight or sunlight report is separate work from our drawings, so tell us at the outset if one has been requested.
Fees and how a job starts
The householder application fee Haringey charges is £548 from 1 April 2026. Our starting fixed fee for single-storey rear extension drawings, with the survey and the planning or permitted development drawings, is £695.
Send us the address and a brief. We check the designations and say which route fits. Wider context is on our London house extension drawings hub, the rear extension drawings page and the pricing page.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| £695 | DrawingsDirect starting fixed fee for single-storey rear extension drawings (survey and planning or permitted development drawings), from the published price list | drawingsdirect.co.uk |
| 3 metres | GPDO 2015 Sch 2 Pt 1 Class A.1(f)(i): a single-storey rear extension may extend beyond the rear wall of the original house by up to 3 metres, house other than detached (source wording: 3 metres) | www.legislation.gov.uk |
| 6 metres | GPDO 2015 Sch 2 Pt 1 Class A.1(g): larger home extension under the prior approval process (A.4), house other than detached, up to 6 metres beyond the original rear wall (source wording: 6 metres) | www.legislation.gov.uk |
| 689 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 90% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 143 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 35% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 33 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 14 Aug 2026) | www.planning.data.gov.uk |
| 60 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 30% | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| £548 | Fees for planning applications in England from 1 April 2026 (MHCLG, SI 2012/2920 as annually indexed), category 6(1): householder application for the enlargement, improvement or alteration of a single dwellinghouse (source wording: £548) | assets.publishing.service.gov.uk |
Questions people ask
Do I need planning permission for a house extension in Muswell Hill?
What if my neighbour objects to my extension in N10?
Photographs: Derek Harper (CC BY-SA 2.0).
