House extensions in Islington

Islington received 508 householder applications in the last 12 months - about 10 a week. Rear extensions and dormers are the most common. Of the 250 decided so far, 239 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

271 last 90 days
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93 last 30 days
|
38 last 14 days

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Showing 50 of 271 applications
P2026/1717/FUL 9 Jul 2026 Pending

21, Arlington Avenue, London, N1 7BE

Replacement of existing front and rear lower ground floor entrance doors; replac

Full Planning (Householder) Islington 9 Jul 2026
P2026/1719/LBC 9 Jul 2026 Pending

21, Arlington Avenue, London, N1 7BE

Replacement of existing front and rear lower ground floor entrance doors; replac

Listed Building Islington 9 Jul 2026
P2026/1704/FUL 8 Jul 2026 Pending

173 Liverpool Road, London, N1 0RF

Demolish of existing single storey conservatory extension anderection of new sin

Full Planning (Householder) Islington 8 Jul 2026
P2026/1705/LBC 8 Jul 2026 Pending

173 Liverpool Road, London, N1 0RF

Demolish existing single storey conservatory extension and build new single stor

Listed Building Islington 8 Jul 2026
P2026/1708/FUL 8 Jul 2026 Pending

75 Dresden Road, London, N19 3BG

Proposed replacement of the existing lower ground floor window with a full-heig

Full Planning (Householder) Islington 8 Jul 2026
P2026/1805/FUL 8 Jul 2026 Pending

10 Pentonville Road, London, N1 9HF

Installation of new entrance door to the front of existing office building.

Full Planning Application Islington 8 Jul 2026
P2026/0821/FUL 6 Jul 2026 Pending

32 Harberton Road, London, N19 3JR

Erection of 1no. bike storage outbuilding and 1no. bin storage outbuilding withi

Full Planning (Householder) Islington 6 Jul 2026
P2026/1606/FUL 3 Jul 2026 Pending

The Coronet, 338 - 346 Holloway Road, London, N7 6NJ

Erection of single storey refuse store within rear external terrace with associa

Full Planning Application Islington 3 Jul 2026
P2026/1292/FUL 2 Jul 2026 Pending

Flats 87-89, 96-101, 102 - 104, 105-110, 111, 116 Heddington Grove, London, N7

Replacement of existing timber framed front entrance doors with double glazed al

Full Planning Application Islington 2 Jul 2026
P2026/1633/FUL 2 Jul 2026 Pending

8 Cressida Road, London, N19 3JW

Rear and side extension at ground floor.

Full Planning (Householder) Islington 2 Jul 2026
P2026/1688/FUL 1 Jul 2026 Pending

Flat 4, 98 Aberdeen Park, London, N5 2BE

Replacement of single glazed timber framed windows with double glazed timber fra

Full Planning Application Islington 1 Jul 2026
P2026/1738/FUL 1 Jul 2026 Pending

Flat 1, 68 Highbury New Park, London, N5 2DJ

Proposed ground floor side extension, garden outbuilding, floor plan redesign an

Full Planning Application Islington 1 Jul 2026
P2026/1740/LBC 1 Jul 2026 Pending

Flat 1, 68 Highbury New Park, London, N5 2DJ

Proposed ground floor side extension, garden outbuilding, floor plan redesign an

Listed Building Islington 1 Jul 2026
P2026/1594/FUL 1 Jul 2026 Pending

41 Besant Walk, Andover Estate, London, N7 7RG

Replacement of windows to serve as fire exits. Replacement of sliding glass gard

Full Planning Application Islington 1 Jul 2026
P2026/1578/FUL 1 Jul 2026 Pending

188 Seven Sisters Road, London, N7 7PX

Proposed removal of pitched roof over existing single storey rear extension and

Full Planning Application Islington 1 Jul 2026
P2026/1741/FUL 1 Jul 2026 Pending

9 Northampton Park, London, N1 2PP

Replacement of roof coverings, including lead linings, ridge tiles and flashings

Full Planning Application Islington 1 Jul 2026
P2026/1743/LBC 1 Jul 2026 Pending

9 Northampton Park, London, N1 2PP

Replacement of roof coverings, including lead linings, ridge tiles and flashings

Listed Building Islington 1 Jul 2026
P2026/1744/FUL 1 Jul 2026 Pending

11 Northampton Park, London, N1 2PP

Replacement of roof coverings, including lead linings, ridge tiles and flashings

Full Planning Application Islington 1 Jul 2026
P2026/1745/LBC 1 Jul 2026 Pending

11 Northampton Park, London, N1 2PP

Replacement of roof coverings, including lead linings, ridge tiles and flashings

Listed Building Islington 1 Jul 2026
P2026/1643/FUL 30 Jun 2026 Pending

Porters Place, 11-33, St John Street, London, EC1M 4AA

Retention of security bars to external windows (Retrospective Application).

Full Planning Application Islington 30 Jun 2026
P2026/1729/LBC 30 Jun 2026 Pending

31 Cloudesley Square, London

Replacement of internal flat entrance doors, architraves and fanlights, install

Listed Building Islington 30 Jun 2026
P2026/1672/FUL 29 Jun 2026 Pending

26 Plimsoll Road, London, N4 2EL

Erection of single storey rear infill extension

Full Planning (Householder) Islington 29 Jun 2026
P2026/1465/FUL 29 Jun 2026 Pending

Fergusson House, 124 - 128 City Road, London

Conversion of the existing plant area at roof level to create a new roof terrace

Full Planning Application Islington 29 Jun 2026
P2026/1696/FUL 29 Jun 2026 Pending

22 Harberton Road, London, N19 3JR

Replacement of existing front and rear windows with new double-glazed units, inc

Full Planning Application Islington 29 Jun 2026
P2026/1706/FUL 29 Jun 2026 Pending

27 Arlington Square, London, N1 7DP

Erection of single storey part-width rear extension and internal alterations at

Full Planning (Householder) Islington 29 Jun 2026
P2026/1707/LBC 29 Jun 2026 Pending

27 Arlington Square, London, N1 7DP

Erection of single storey part-width rear extension and internal alterations at

Listed Building Islington 29 Jun 2026
P2026/1414/FUL 26 Jun 2026 VALIDATED

41 - 46, The Vaults, Chiswell Street, London, EC1Y 4SB

Proposed storerooms, workshops, utility room, toilet, damp proofing to basement vaults and floors, steelwork, lift and ramps. New access lift from gro...

Full Planning Application Islington 26 Jun 2026
P2026/1512/LBC 26 Jun 2026 VALIDATED

41 - 46, The Vaults, Chiswell Street, London, EC1Y 4SB

Proposed storerooms, workshops, utility room, toilet, damp proofing to basement vaults and floors, steelwork, lift and ramps. New access lift from gro...

Listed Building Islington 26 Jun 2026
P2026/1680/FUL 26 Jun 2026 VALIDATED

1, Alwyne Villas, London, N1 2HG

Internal and external refurbishment works, including replacement of selected doors and windows, roof and garage repairs, boundary treatments, damp rem...

Full Planning (Householder) Islington 26 Jun 2026
P2026/1588/FUL 25 Jun 2026 VALIDATED

58 Barnsbury Street, London, N1 1ER

Internal alterations including the following: Move the existing kitchen from the lower ground floor to the upper ground floor rear room. Reinstate the...

Full Planning (Householder) Islington 25 Jun 2026
P2026/1589/LBC 25 Jun 2026 VALIDATED

58 Barnsbury Street, London, N1 1ER

Internal alterations including the following: Move the existing kitchen from the lower ground floor to the upper ground floor rear room. Reinstate the...

Listed Building Islington 25 Jun 2026
P2026/1597/FUL 25 Jun 2026 VALIDATED

48 Canonbury Road, London, N1 2HS

Repair and partial replacement of roof coverings and leadwork, masonry repair, repair/replacement of windows throughout and other associated external ...

Full Planning Application Islington 25 Jun 2026
P2026/1598/LBC 25 Jun 2026 VALIDATED

48 Canonbury Road, London, N1 2HS

Repair and partial replacement of roof coverings and leadwork, masonry repair, repair/replacement of windows throughout and other associated external ...

Listed Building Islington 25 Jun 2026
P2026/1671/LBC 25 Jun 2026 VALIDATED

4 Granville Square, London, WC1X 9PF

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

Listed Building Islington 25 Jun 2026
P2026/1676/LBC 25 Jun 2026 VALIDATED

30, Lonsdale Square, London, N1 1EW

Internal alterations including refurbishment of the third-floor bathroom and basement kitchenette; reinstatement of a partition wall at rear basement ...

Listed Building Islington 25 Jun 2026
P2026/1673/FUL 25 Jun 2026 VALIDATED

6, Dalmeny Avenue, London, N7 0JS

Replacement of existing timber single-glazed windows and patio doors with double-glazed UPVc windows and doors. Replacement of existing balconies timb...

Full Planning Application Islington 25 Jun 2026
P2026/1677/LBC 25 Jun 2026 VALIDATED

5 Claremont Square, London

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

Listed Building Islington 25 Jun 2026
P2026/1570/FUL 24 Jun 2026 VALIDATED

23, Northolme Road, London, N5 2UZ

demolition of existing front boundary wall. Excavation and creation of new steps, planters, retaining structure and bin storage area.

Full Planning Application Islington 24 Jun 2026
P2026/1665/FUL 24 Jun 2026 VALIDATED

119 Sotheby Road, London, N5 2UT

Construction of a single-storey side extension to existing dwelling house.

Full Planning (Householder) Islington 24 Jun 2026
P2026/1649/FUL 24 Jun 2026 VALIDATED

2, Northolme Road, London, N5 2UZ

Erection of single-storey rear and rear infill extension, and associated alterations to dwelling house

Full Planning (Householder) Islington 24 Jun 2026
P2026/1523/FUL 23 Jun 2026 VALIDATED

8 Canonbury Street, London, N1 2TD

Replacement dark woodgrain uPVC windows and doors

Full Planning Application Islington 23 Jun 2026
P2026/1645/COL 23 Jun 2026 VALIDATED

2 Lidyard Road, London, N19 5NR

Erection of single-storey rear extension and associated external and internal alterations.

Certificate of Lawfulness Listed Building (Proposed) Islington 23 Jun 2026
P2026/1619/FUL 22 Jun 2026 VALIDATED

58 Northdown Street, London, N1 9BS

Erection of single storey rear extension (following demolition of existing), lowering of existing vault floors and associated works.

Full Planning (Householder) Islington 22 Jun 2026
P2026/1620/LBC 22 Jun 2026 VALIDATED

1 Alwyne Villas, London, N1 2HG

Internal and external refurbishment works, including replacement of selected doors and windows, roof and garage repairs, boundary treatments, damp rem...

Listed Building Islington 22 Jun 2026
P2026/1622/LBC 22 Jun 2026 VALIDATED

250, Caledonian Road, London, N1 0NG

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

Listed Building Islington 22 Jun 2026
P2026/1623/LBC 22 Jun 2026 VALIDATED

16 Copenhagen Street, London

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

Listed Building Islington 22 Jun 2026
P2026/1625/LBC 22 Jun 2026 VALIDATED

36 Barnsbury Road, London

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

Listed Building Islington 22 Jun 2026
P2026/1497/FUL 22 Jun 2026 VALIDATED

7, Highbury Park, London, N5 1QJ

Replacement of 3 existing windows.

Full Planning Application Islington 22 Jun 2026
P2026/1609/FUL 22 Jun 2026 VALIDATED

19, Thornhill Crescent, London, N1 1BJ

Construction of a lower ground floor part width extension to the rear. (Associated Listed Building Consent Application Ref. P2026/1608/LBC).

Full Planning (Householder) Islington 22 Jun 2026
P2026/1630/FUL 22 Jun 2026 VALIDATED

5 Cumberland Gardens, London, WC1X 9AF

Replacement of front lightwell bitumen roofing with lead, and internal alterations [Listed Building Consent P2026/1631/LBC also submitted].

Full Planning (Householder) Islington 22 Jun 2026
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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 — taller, larger, 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 with objections) 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.