House extensions in Islington

Islington received 1,093 householder applications in the last 12 months - about 21 a week. Rear extensions and dormers are the most common. Of the 774 decided so far, 730 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 302 applications
Yesterday VALIDATED P2026/2468/FUL

71 Arlington Avenue, London, N1 7BA

Replacement of coal store doors with timber sash windows.

Full Planning (Householder) Islington
Yesterday VALIDATED P2026/2734/FUL

35A Devonia Road, London, N1 8JQ

Amalgamation of the basement and ground floor flats into a single dwelling with a new internal staircase; enclosure of the existing rear terrace to fo...

Full Planning Application Islington
Yesterday VALIDATED P2026/2770/FUL

53 Romilly Road, London, N4 2QY

Ground floor extension to rear and side return of existing terraced house

Full Planning (Householder) Islington
Yesterday VALIDATED P2026/2747/FUL

51, Romilly Road, London, N4 2QY

Proposed single storey ground floor side return and rear extension

Full Planning (Householder) Islington
Yesterday VALIDATED P2026/2708/FUL

Flat B, 3 Giesbach Road, London, N19 3DA

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

Full Planning Application Islington
23 Oct 2026 VALIDATED P2026/2732/LBC

49 Canonbury Road, London, N1 2DG

Creation of an opening through the spine wall at basement level [Full planning application reference P2026/2731/FUL also submitted].

Listed Building Islington
22 Oct 2026 VALIDATED P2026/2694/FUL

Upper Floors 222 Seven Sisters Road, London, N4 3NX

Construction of a rear extension at extension at second, third and fourth floor level with roof terraces above.

Full Planning Application Islington
19 Oct 2026 VALIDATED P2026/2671/LBC

49, Thornhill Road, London, N1 1JS

Loft conversion with addition of two rear dormers

Listed Building Islington
19 Oct 2026 VALIDATED P2026/2670/FUL

49, Thornhill Road, London, N1 1JS

Loft conversion with addition of two rear dormers P2026/2671/LBC also submitted

Full Planning Application Islington
19 Oct 2026 VALIDATED P2026/0986/FUL

18 Quick Street, London, N1 8HL

Part-retrospective construction of outbuilding to rear garden.

Full Planning (Householder) Islington
19 Oct 2026 VALIDATED P2026/2721/LBC

539 Liverpool Road, London, N7 8NS

Renewal of timber rear gate [Full planning application reference P2026/2720/FUL also submitted].

Listed Building Islington
19 Oct 2026 VALIDATED P2026/2720/FUL

539 Liverpool Road, London, N7 8NS

Renewal of timber rear gate [Listed Building Consent reference P2026/2721/LBC also submitted].

Full Planning Application Islington
19 Oct 2026 VALIDATED P2026/2353/LBC

3 River Street, London

Listed Building Consent in connection with the replacement of existing single glazed timber framed sash windows to front and rear elevations with new ...

Listed Building Islington
19 Oct 2026 VALIDATED P2026/2349/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
16 Oct 2026 VALIDATED P2026/2673/FUL

195 Tufnell Park Road, London, N7 0PU

Erection of rear dormer roof extension (to include solar panels) and installation of 2x front rooflights

Full Planning (Householder) Islington
16 Oct 2026 VALIDATED P2026/2599/FUL

2 Prospero Road, London, N19 3RF

Erection of rear roof dormer. Roof finish replacement and installation of roof-light to front roof slope. Replacement windows to roof level windows. I...

Full Planning (Householder) Islington
15 Oct 2026 VALIDATED P2026/2612/FUL

23 Tavistock Terrace, London, N19 4BZ

Reconstruction of the rear outrigger and an enlarged rear lower ground floor level courtyard together with replacement of the main roof roof coverings...

Full Planning (Householder) Islington
15 Oct 2026 VALIDATED P2026/2504/FUL

41 Morton Road, London, N1 3GF

Removal and replacement of the existing roof coverings, installation of a new insulated waterproofing system incorporating tapered insulation, replace...

Full Planning Application Islington
15 Oct 2026 VALIDATED P2026/2201/FUL

338, City Road, London, EC1V 2PY

Erection of a single-storey roof extension to provide additional office space (Class E) and new accessible lift, and installation of new entrance on C...

Full Planning Application Islington
14 Oct 2026 VALIDATED P2026/2675/FUL

21 Ockendon Road, London, N1 3NN

Erection of a mansard roof extension with four dormers (two to the front and two to the rear), alterations to front - ornamentation of railings, new ...

Full Planning (Householder) Islington
14 Oct 2026 VALIDATED P2026/2669/LBC

31 Highbury New Park, London, N5 2EN

Replacement of side extensions; reinstatement of the street boundary wall and missing cast stone balustrades; replacement of non-original windows; rem...

Listed Building Islington
14 Oct 2026 VALIDATED P2026/2668/FUL

31 Highbury New Park, London, N5 2EN

Replacement of side extensions; reinstatement of the street boundary wall and missing cast stone balustrades; replacement of non-original windows; rem...

Full Planning (Householder) Islington
14 Oct 2026 VALIDATED P2026/2636/FUL

3 Marlborough Yard, London, N19 4ND

Construction of new rooftop conservatory, pergola and raised decking in place of existing structures.

Full Planning (Householder) Islington
14 Oct 2026 VALIDATED P2026/2505/FUL

39 Morton Road, London, N1 3GF

Refurbishment and overlay of the existing flat roof, replacement rooflights and roof access hatches, associated works to parapets and parapet capping’...

Full Planning Application Islington
13 Oct 2026 VALIDATED P2026/2760/COL

60 Shaftesbury Road, London, N19 4QN

Erection of rear dormer roof extension, installation of 1 x front rooflight (Certificate of Lawfulness: Proposed)

Certificate of Lawfulness (Proposed) Islington
13 Oct 2026 VALIDATED P2026/2693/COL

71 & 73 Drayton Park, London, N5 1AN

Certificate of Lawfulness (Proposed) for remediation and external re-cladding works to all elevations in order to meet required fire safety standards.

Certificate of Lawfulness (Proposed) Islington
13 Oct 2026 VALIDATED P2026/2650/COL

Hollyfield and Rosefield, Six Acres Estate, Pooles Park, London, N4 3FD

Certification of lawfulness (Proposed) for like-for-like alterations to the external facades of the Hollyfield and Rosefield residential blocks as par...

Certificate of Lawfulness (Proposed) Islington
13 Oct 2026 VALIDATED P2026/2656/LBC

18 And A Half Cloudesley Square, London, N1 0HN

Replace of upper floor sash windows [Full planning application reference P2026/2655/FUL also submitted].

Listed Building Islington
13 Oct 2026 VALIDATED P2026/2655/FUL

18 And A Half Cloudesley Square, London, N1 0HN

Replacement of three upper floor sash windows. [Listed Building consent reference P2026/2656/LBC also submitted].

Full Planning Application Islington
13 Oct 2026 VALIDATED P2026/2452/FUL

48 Ecclesbourne Road, London, N1 3BF

Replacement of existing single glazed timber framed casement windows to front, side and rear elevations with new double glazed timber framed casement ...

Full Planning Application Islington
13 Oct 2026 VALIDATED P2026/2562/FUL

Flat A, 6 Dickenson Road, London, N8 9EN

Installation of fully retractable awning to rear patio doors at upper ground floor level.

Full Planning Application Islington
13 Oct 2026 VALIDATED P2026/1961/FUL

Third Floor Unit 185, Exmouth House, 3 - 11 Pine Street, London, EC1R 0JH

Installation of 2 no. ventilation grilles into existing window panes

Full Planning Application Islington
12 Oct 2026 VALIDATED P2026/2678/LBC

37, Noel 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...

Listed Building Islington
12 Oct 2026 VALIDATED P2026/2513/FUL

Alliance House, 44-45 Newington Green, London, N16 9QH

Removal of existing cladding to 4no. Student Accommodation blocks and installation of new non-combustible cladding.

Full Planning Application Islington
12 Oct 2026 VALIDATED P2026/2592/FUL

2 Hadrian Mews, London, N7 8XA

Replacement of single storey rear conservatory roof and frames

Full Planning (Householder) Islington
12 Oct 2026 VALIDATED P2026/2607/FUL

14 - 15 Charterhouse Buildings, London, EC1M 7BA

Installation of new entrance doors, replacement windows and air vents.

Full Planning Application Islington
12 Oct 2026 VALIDATED P2026/2538/LBC

20 Canonbury Grove, London, N1 2HR

Demolition of the existing single storey lower ground floor rear extension and external rear staircase, and erection of a replacement full-width singl...

Listed Building Islington
12 Oct 2026 VALIDATED P2026/2537/FUL

20 Canonbury Grove, London, N1 2HR

Demolition of the existing single storey lower ground floor rear extension and external rear staircase, and erection of a replacement full-width singl...

Full Planning Application Islington
12 Oct 2026 VALIDATED P2026/2642/LBC

86, Shepperton Road, London, N1 3DQ

Construction of single-storey, full-width rear extension. Excavating of the lower ground floor and rear patio ground level by 190mm. Rebuild garden wa...

Listed Building Islington
12 Oct 2026 VALIDATED P2026/2641/FUL

86 Shepperton Road, London, N1 3DQ

Construction of single-storey, full-width rear extension. Excavating of the lower ground floor and rear patio ground level by 190mm. Rebuild garden wa...

Full Planning (Householder) Islington
12 Oct 2026 VALIDATED P2026/2539/FUL

201 Highbury Quadrant, London, N5 2TE

Construction of lower ground floor rear and side infill extension. Construction of roof extensions including a rear dormer and an extension over the e...

Full Planning Application Islington
9 Oct 2026 VALIDATED P2026/2663/FUL

54, Plimsoll Road, London, N4 2EL

Demolition of the existing conservatory and erection of a sinlge-storey side and rear extension and replacement of the first floor side window

Full Planning (Householder) Islington
9 Oct 2026 VALIDATED P2026/2278/FUL

414 Hornsey Road, London, N19 4EB

Alterations to ground floor front elevation and rear side access door, installation of a rooflight on existing single-storey rear extension and remova...

Full Planning Application Islington
9 Oct 2026 VALIDATED P2026/2587/LBC

56 Thornhill Square, London

Amalgamation of three flats into a single dwellinghouse and repair and restoration of architectural plan form and lost detail. P2026/2586/FUL also sub...

Listed Building Islington
9 Oct 2026 VALIDATED P2026/2463/FUL

2 - 4, Highbury Corner, London, N5 1RE

Removal of the existing external side ramp and construction of a single-storey set back side extension incorporating stepped access and a wheelchair l...

Full Planning Application Islington
9 Oct 2026 VALIDATED P2026/2476/FUL

29, Newington Green, London, N16 9PU

Replacement of existing single glazed timber sash and casement windows like for like for double glazed timber sash and casement windows as well as ext...

Full Planning Application Islington
9 Oct 2026 VALIDATED P2026/2586/FUL

56 Thornhill Square, London N1 1BE

Amalgamation of three flats into a single dwellinghouse and repair and restoration of architectural plan form and lost detail. P2026/2587/LBC also sub...

Full Planning Application Islington
9 Oct 2026 VALIDATED P2026/2611/FUL

65 Canning Road, London, N5 2JR

enlargement of rear first floor window, replacement doors to ground floor rear elevation

Full Planning (Householder) Islington
9 Oct 2026 VALIDATED P2026/2608/FUL

1 Heathville Road, London, N19 3AL

Alterations to the rear elevation and internal layout, including replacement of existing rear doors, window and rooflight, rendering of the rear eleva...

Full Planning (Householder) Islington
8 Oct 2026 VALIDATED P2026/2657/FUL

54, Plimsoll Road, London, N4 2EL

Erection of rear dormer roof extension over the main and part of the outrigger roof and installation of front rooflights

Full Planning (Householder) 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.