House extensions in Islington

Islington received 790 householder applications in the last 12 months - about 15 a week. Rear extensions and dormers are the most common. Of the 502 decided so far, 476 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

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Showing 50 of 266 applications
Yesterday VALIDATED P2026/2289/FUL

4 Prospero Road, London, N19 3RF

Erection of single-storey side-return infill extension and associated internal alterations.

Full Planning (Householder) Islington
Yesterday VALIDATED P2026/1339/FUL

26, Upper Street, London, N1 0PQ

Replacement of single glazed timber sashes and casements with double glazed composite windows to front and rear elevations.

Full Planning Application Islington
2 days ago VALIDATED P2026/2262/FUL

28 Highbury Park, London, N5 2AA

Installation of inward facing bi-fold windows (retrospective).

Full Planning Application Islington
2 days ago VALIDATED P2026/2263/FUL

66 St Paul Street, London, N1 7DA

Proposed lower ground floor extension to existing rear garden to provide new kitchen and partial excavation of rear terrace.

Full Planning (Householder) Islington
8 Sept 2026 VALIDATED P2026/2324/FUL

84 Mercers Road, London, N19 4PR

Replacement of existing ground floor patio doors. Creation of terrace above rear closet wing and metal railings. Replacement of first floor sash windo...

Full Planning (Householder) Islington
8 Sept 2026 VALIDATED P2026/2308/FUL

47, Mercers Road, London, N19 4PP

Retrospective window replacements

Full Planning (Householder) Islington
8 Sept 2026 VALIDATED P2026/2226/FUL

Flat B, 6 Pakeman Street, London, N7 6QN

Replacement windows.

Full Planning Application Islington
7 Sept 2026 VALIDATED P2026/2287/LBC

Flat 2, 41 Myddelton Square, London, EC1R 1YB

Replacement of windows, reinstatement of skirtings, cornices, picture rails, shutters, architraves, fireplaces, and internal doors, internal layout al...

Listed Building Islington
7 Sept 2026 VALIDATED P2026/2286/FUL

Flat 2, 41 Myddelton Square, London, EC1R 1YB

Replacement of windows, reinstatement of skirtings, cornices, picture rails, shutters, architraves, fireplaces, and internal doors, internal layout al...

Full Planning Application Islington
4 Sept 2026 VALIDATED P2026/2168/FUL

456, Holloway Road, London, N7 6QA

Erection of a first-floor rear extension and associated internal alterations to facilitate the enlargement of the existing Sui Generis House in Multip...

Full Planning Application Islington
4 Sept 2026 VALIDATED P2026/2291/LBC

61, Noel Road, London, N1 8HE

Upward extension of the existing rear outrigger to provide an additional bathroom accessed from the existing stair half-landing, together with associa...

Listed Building Islington
4 Sept 2026 Pending P2026/2288/FUL

34 Sudeley Street, London, N1 8HW

Retrospective application for reroofing the hidden front 'butterfly roof and rea

Full Planning (Householder) Islington
4 Sept 2026 VALIDATED P2026/2205/FUL

Flat 3, 8 Birnam Road, London, N4 3LQ

Erection of a rear dormer roof extension and a rear roof terrace with a railing surround.

Full Planning Application Islington
3 Sept 2026 Pending P2026/1941/FUL

Flat A, 10 Loraine Road, London, N7 6EZ

Replacement of an existing external step to access the rear garden.

Full Planning Application Islington
3 Sept 2026 VALIDATED P2026/2280/FUL

Margery Street Community Hall, 1 Margery Street, London, WC1X 0HR

A new secondary access gate adjacent to the Community Room at Margery Street Community Hall

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2315/LBC

86 Highbury New Park, London

Replacement of internal flat entrance doors, architraves and fanlights, installation of new fire alarm system and emergency lighting, and replacement ...

Listed Building Islington
2 Sept 2026 VALIDATED P2026/2309/LBC

27 Barnsbury Park, London, N1 1HQ

Replacement of internal flat entrance doors, architraves and fanlights, installation of new fire alarm system, and replacement electrical cupboard.

Listed Building Islington
2 Sept 2026 VALIDATED P2026/2237/FUL

2A Arran Walk, London, N1 2TL

Alterations to and extension of existing dwellinghouse comprising front infill extension; alterations to and re-cladding of elevations; alterations to...

Full Planning (Householder) Islington
2 Sept 2026 VALIDATED P2026/2158/FUL

33 Packington Street, London, N1 8QB

Replacement of all existing single-glazed timber windows with double-glazed timber units, together with the replacement of the rainwater goods system,...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2160/FUL

52 Ockendon Road, London

Replacement of all existing single-glazed timber windows with like-for-like double-glazed timber units, together with the replacement of the rainwater...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2153/FUL

37 Packington Street, London

Replacement of all existing single-glazed timber windows with double-glazed timber units, together with the replacement of the rainwater goods system ...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2147/FUL

71 Ockendon Road, London

Replacement of all existing single-glazed timber windows with double-glazed timber units, together with the replacement of the rainwater goods system,...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2061/FUL

153 Northchurch Road, London

Replacement of all existing single-glazed timber windows with double-glazed timber units, together with the replacement of the rainwater goods system,...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2065/FUL

181 Northchurch Road, London

Replacement of all existing single-glazed timber windows with like-for-like double-glazed timber units, together with the replacement of the rainwater...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2057/FUL

66 Northchurch Road, London

Replacement of all existing single-glazed timber windows with double-glazed timber units, together with the replacement of the rainwater goods system,...

Full Planning Application Islington
2 Sept 2026 VALIDATED P2026/2180/FUL

8, Brewery Square, London, EC1V 4LE

Installation of a retractable glazed canopy to the rear courtyard and associated works.

Full Planning (Householder) Islington
2 Sept 2026 VALIDATED P2026/2078/FUL

47, Devonia Road, London

Replacement of all existing single-glazed timber windows with double-glazed timber units, together with the replacement of the rainwater goods system,...

Full Planning Application Islington
1 Sept 2026 VALIDATED P2026/2302/LBC

32, 34, 36 & 38, Amwell Street, London, EC1R 1XT

Replacement of internal flat entrance doors, architraves and fanlights, installation of new fire alarm system and emergency lighting, and replacement ...

Listed Building Islington
1 Sept 2026 VALIDATED P2026/1879/FUL

3 River Street, London

Replacement of existing single glazed timber framed sash windows to front and rear elevations with new double glazed timber framed sash windows along ...

Full Planning Application Islington
1 Sept 2026 VALIDATED P2026/2245/FUL

20, Thornhill Bridge Wharf, London, N1 0RU

Replacement of existing rear French doors, front window and front door with uPVC units; enclosure of existing covered entrance area with matching bric...

Full Planning Application Islington
31 Aug 2026 Pending P2026/2292/FUL

61, Noel Road, London, N1 8HE

Upward extension of the existing rear outrigger to provide an additional bathroo

Full Planning (Householder) Islington
31 Aug 2026 VALIDATED P2026/2293/FUL

12 Orleston Mews, London, N7 8LL

Change the position of the triangular window on one of the approved dormers (front facing window omitted and rear facing window added); increase the h...

Full Planning (Householder) Islington
31 Aug 2026 VALIDATED P2026/2294/FUL

4 Chillingworth Road, London, N7 8QJ

Erection of single storey rear infill extension

Full Planning (Householder) Islington
28 Aug 2026 VALIDATED P2026/2221/FUL

2 Lidyard Road, London, N19 5NR

Erection of single-storey rear extension and associated alterations.

Full Planning Application Islington
28 Aug 2026 VALIDATED P2026/1997/FUL

First And Second Floor Flat, 54 Offord Road, London, N1 1EB

Proposed internal alterations to first and second floors to amend internal layout, creation of a first floor rear terrace and associated works.

Full Planning Application Islington
27 Aug 2026 VALIDATED P2026/2272/LBC

355 St John Street, London, EC1V 4LB

Replacement of internal flat entrance doors, architraves and fanlights, installation of new fire alarm system and emergency lighting, and replacement ...

Listed Building Islington
27 Aug 2026 VALIDATED P2026/2266/COL

32 Gillespie Road, London, N5 1LN

Erection of rear dormer roof extensions to main and outrigger roofs, installation of 2 x front rooflights (Certificate of Lawfulness: Proposed)

Certificate of Lawfulness (Proposed) Islington
27 Aug 2026 VALIDATED P2026/2274/LBC

14 and 15 Granville Square, London, WC1X 9PF

Replacement of internal flat entrance doors, architraves and fanlights, installation of new fire alarm system, and replacement electrical cupboard.

Listed Building Islington
27 Aug 2026 VALIDATED P2026/2273/FUL

32 Gillespie Road, London, N5 1LN

Erection of storey rear wrap-around extension.

Full Planning (Householder) Islington
26 Aug 2026 VALIDATED P2026/1965/FUL

York Central, 70-78 York Way, London, N1 9AG

Works to external terraces (levels 2, 3, 4, 5 & 6) including replacement of uninsulated asphalt and concrete paviours with insulated roofing membrane ...

Full Planning Application Islington
26 Aug 2026 VALIDATED P2026/2235/FUL

Flat 7, 231 - 235, Liverpool Road, London, N1 1LX

Retention of replacement aluminium-framed windows and doors at third floor level

Full Planning Application Islington
25 Aug 2026 VALIDATED P2026/2014/FUL

330 Holloway Road, London

Replacement of all existing single-glazed timber windows with like-for-like double-glazed timber units.

Full Planning Application Islington
25 Aug 2026 VALIDATED P2026/1992/FUL

56 Offord Road, London

Construction of a mansard roof extension.

Full Planning Application Islington
25 Aug 2026 VALIDATED P2026/1901/FUL

87 Shaftesbury Road, London

Removal of existing timber windows to the front, side and rear elevations along with rear timber doors and replacement with double glazed timber windo...

Full Planning Application Islington
25 Aug 2026 VALIDATED P2026/1878/FUL

45 Gladsmuir Road, London, N19 3JY

Replacement of existing timber windows and doors to the front and rear elevations and replacement with double glazed timber windows and doors.

Full Planning Application Islington
25 Aug 2026 VALIDATED P2026/1931/FUL

St John's Tavern Public House, 91 Junction Road, London, N19 5QU

Formation of external pergola structure within existing rear patio area with associated boundary treatment works including replacement of existing str...

Full Planning Application Islington
25 Aug 2026 Pending P2026/1920/LBC

115, Youngs brewery, Upper Street, London, N1 1QN

Structural repairs/strengthening to roof structure, replacement lintels at secon

Listed Building Islington
25 Aug 2026 VALIDATED P2026/1919/FUL

115, Youngs brewery, Upper Street, London, N1 1QN

Structural repairs/strengthening to roof structure, replacement lintels at second floor, re-forming the existing box gutter and re-tiling of the exist...

Full Planning Application Islington
24 Aug 2026 VALIDATED P2026/2250/FUL

12 Coombs Street, London, N1 8DJ

Erection of additional storey to rear outrigger, insertion of double doors to front lightwell, alteration to ground floor rear doors, insertion of roo...

Full Planning (Householder) Islington
24 Aug 2026 VALIDATED P2026/2253/LBC

13, 14, 15 Ashby Street, London, EC1V 0ED

Replacement of internal flat entrance doors, architraves and fanlights, installation of new fire alarm system and emergency lighting, and replacement ...

Listed Building Islington
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Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits, whether taller, larger or in a protected area, needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases, especially those drawing a lot of comments, can take longer.
Can I get email alerts for new extensions applications in Islington?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Islington. You can also narrow the alert to a postcode, street, or drawn area.

We check Islington's planning portal daily. New extensions applications appear here within a day of being published.