Rear extension drawings for Islington homes, £589
Islington has removed permitted development in 40 of its 42 conservation areas, and each area has its own design guideline. In Highbury Fields, a full-width rear extension above one storey will not normally be permitted. We read the guideline for your street.
- £439 drawings + £150 survey (£589 total)
- 40 of 42 areas controlled
- Area guideline read first
What do rear extension drawings cost in Islington?
We charge £589: £439 for the drawings, forms and submission and £150 for the survey visit, with no VAT to add. Islington Council’s application fee is paid to the council.
What the Islington price covers
- A survey of the back addition, rear wall and garden
- Existing and proposed plans, elevations and sections
- The conservation area guideline for your street, read against the design
- Submission to Islington and replies to the case officer
| Our drawings and submission paid to us | £439 |
|---|---|
| Measured survey paid to us | £150 |
| Council householder fee paid to the council | £548 |
| Total | £1,137 |
We charge £589 in total. The £548 is paid to the council when the application goes in, and the survey is charged once if you later order building regulations drawings for the same house.
Forty of Islington’s 42 conservation areas
Islington says it has removed permitted development in 40 of its 42 conservation areas with an Article 4 direction, so minor alterations such as changing external doors and windows or painting brickwork may need permission, and its interactive map shows which areas are covered (Islington permitted development). The Article 4(2) directions are made after consultation, where further control is desirable to preserve an area (Islington conservation areas).
Islington’s wording on the Article 4 pages is about minor alterations. Rear extensions are tested by each area’s own design guideline, which is where the real limit sits.
One area in detail: Highbury Fields
The Highbury Fields guidelines say full-width rear extensions higher than one storey, or half-width ones higher than two storeys, will not normally be permitted unless no harm to the area’s character is shown. Rear extensions must be subordinate to the main building’s mass and height, and side extensions are permitted only on properties in a listed schedule (Highbury Fields guidelines).
For example, a single-storey kitchen extension to a Highbury Place terrace can be argued on its merits, while a two-storey full-width one starts with the guideline against it. Other Islington areas have their own wording, so we read yours. Islington decided 142 of 146 householder applications inside 8 weeks in the year to June 2026, and we draw the extension as the case officer will assess it so the pack passes validation without a query.
Islington rear extensions in numbers
- 40 of 42
- Islington conservation areas where permitted development has been removed by an Article 4 direction. Islington: when you do or don’t need planning permission
- 42
- Conservation areas in Islington. Islington: conservation areas
- Above 1 storey
- Height beyond which Highbury Fields’ guidelines say full-width rear extensions will not normally be permitted. Islington: Highbury Fields (CA05) conservation area design guidelines, January 2002
- Above 2 storeys
- Height beyond which half-width rear extensions will not normally be permitted in Highbury Fields. Islington: Highbury Fields (CA05) conservation area design guidelines, January 2002
- Jan 2002
- Issue date of the Highbury Fields conservation area design guidelines. Islington: Highbury Fields (CA05) conservation area design guidelines, January 2002
- 142 of 146
- Islington Council householder applications decided within 8 weeks in the year to June 2026, out of all it decided (prior approvals not counted). MHCLG live table PS2, planning application statistics by district, July 2025 to June 2026 (GOV.UK)
- £96.97 per m²
- The Mayor of London’s CIL in Islington (band 1) for permissions granted in 2026, owed only when a scheme is liable for CIL in the first place. Mayoral CIL: annual rate summary for 2026, Table 1 (Greater London Authority)
Islington rear extension questions
Is my Islington house in an Article 4 area?
Probably. 40 of 42 conservation areas are. Islington’s map shows the rest.
Can I build a two-storey rear extension in Highbury Fields?
Full width above one storey will not normally be permitted, and half width above two storeys will not either, unless no harm is shown.
Does Article 4 stop a rear extension?
Islington’s Article 4 wording is about minor alterations, but each area’s guideline sets the extension rules.
How fast does Islington decide?
It decided 142 of 146 householder cases within 8 weeks last year. We cannot promise a date.
Other services people book with this one
- Prior approval for a larger home extension£349 drawings + £150 survey (£499 total)
- Lawful Development Certificate drawings£389 drawings + £150 survey (£539 total)
- Building regulations drawings£479 drawings + £150 survey (£629 total)
- Side return extension drawings£479 drawings + £150 survey (£629 total)
- Party wall notice£39
Price your Islington extension
Send the address and a sketch. We read the area guideline and reply with a fixed price.