House extensions in Haringey

Haringey received 1,173 householder applications in the last 12 months - about 23 a week. Dormers and rear extensions are the most common. Of the 935 decided so far, 869 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 310 applications
Yesterday Under Consultation HGY/2026/2794

26-28 Gladesmore Road London N15 6TB

Erection of "Type 3" roof extension to both joint semi-detached properties

Householder planning permission Haringey
22 Oct 2026 Under Consultation HGY/2026/2906

36 Cavell Road Tottenham London N17 7BJ

Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be 3m and for w...

Prior approval Part 1 Class A.1(ea) Haringey
21 Oct 2026 Under Consultation HGY/2026/2447

6A - 6B Colsterworth Road London N15 4BJ

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

Householder planning permission Haringey
20 Oct 2026 Under Consultation HGY/2026/2881

3 Montague Road Hornsey London N8 9PJ

Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be 3.5m and for...

Prior approval Part 1 Class A.1(ea) Haringey
19 Oct 2026 Under Consultation HGY/2026/2871

126 Nelson Road Hornsey London N8 9RN

Demolition of the existing rear dormer and erection of a replacement rear dormer; installation of one rear rooflight; and replacement of the first-flo...

Householder planning permission Haringey
19 Oct 2026 Valid HGY/2026/2625

17 St Pauls Road Tottenham London N17 0NB

Certificate of Lawfulness for proposed use: Erection of 2no. ground floor single storey rear extensions in the infill and the rear wall of the two sto...

Lawful development Haringey
16 Oct 2026 Under Consultation HGY/2026/2851

Flat 2 4 Etherley Road Tottenham London N15 3AJ

Single storey rear infill extension

Full planning permission Haringey
16 Oct 2026 Under Consultation HGY/2026/2854

First Floor Flat and Second Floor Flat 519 Seven Sisters Road Tottenham London N15 6EP

Change of use of 2no. self-contained flats on the upper floors (Use Class C3) to a 9-person 9-bed HMO (Use Class Sui Generis), and erection of a first...

Change of use Haringey
16 Oct 2026 Under Consultation HGY/2026/2867

117 Crowland Road Tottenham London N15 6UR

Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be 2.9m and for...

Prior approval Part 1 Class A.1(ea) Haringey
16 Oct 2026 Under Consultation HGY/2026/2643

495 Seven Sisters Road Tottenham London N15 6EP

Dormer extension and conversion into a 8 room HMO

Full planning permission Haringey
15 Oct 2026 Under Consultation HGY/2026/2846

5 Talbot Road Wood Green London N22 7UA

Formation of rear dormer window and the insertion of 3 nos. front rooflights.

Householder planning permission Haringey
15 Oct 2026 Under Consultation HGY/2026/2840

26 Fortis Green Avenue Hornsey London N2 9NA

Erection of a single storey rear extension

Householder planning permission Haringey
15 Oct 2026 Under Consultation HGY/2026/2161

Rowlands Close North Hill Hornsey London N6 4BX

External refurbishment and repair works including replacement balcony and walkway railings, replacement entrance doors, boundary wall reconstruction, ...

Full planning permission Haringey
15 Oct 2026 Under Consultation HGY/2026/2727

Flat A 59 Pemberton Road Hornsey London N4 1AX

Loft conversion consisting of rear dormer and front rooflights; proposed roof terrace with privacy screen on rear outrigger roof.

Householder planning permission Haringey
15 Oct 2026 Under Consultation HGY/2026/2845

30 Mansfield Avenue Tottenham London N15 4HW

Erection of single storey extension which extends beyond the rear wall of the original house by 3.3m, for which the maximum height would be 3m and for...

Prior approval Part 1 Class A.1(ea) Haringey
14 Oct 2026 Under Consultation HGY/2026/2836

66 Tottenham Lane Hornsey London N8 7EE

Replacement of existing windows with double-glazed uPVC windows and replacement of access and egress doors (where applicable) with composite doors, al...

Full planning permission Haringey
14 Oct 2026 Under Consultation HGY/2026/2831

22B Talbot Road Hornsey London N6 4QR

Retention of replacement white painted grey aluminium-framed windows to the front dormer and grey aluminium-framed windows to the rear dormer, enlarge...

Full planning permission Haringey
14 Oct 2026 Under Consultation HGY/2026/2395

8 Curzon Road Hornsey London N10 2RA

Retrospective application for erection of part single-storey rear extension and proposed rear roof dormer extension, including the formation of a flat...

Householder planning permission Haringey
13 Oct 2026 Under Consultation HGY/2026/2827

Flat 1 53 Napier Road Tottenham London N17 6YG

Erection of single-storey side and rear extension to ground-floor flat, associated external alterations, and installation of air source heat pump with...

Full planning permission Haringey
13 Oct 2026 Under Consultation HGY/2026/2825

Flat 1 12 Ossian Road Hornsey London N4 4EA

Extension of the existing half-basement to the ground-floor flat, including the formation of a front lightwell and the provision of a bin store.

Full planning permission Haringey
13 Oct 2026 Under Consultation HGY/2026/2748

23B Kingsley Place Hornsey London N6 5EA

Erection of a Single Storey Rear Extension

Householder planning permission Haringey
13 Oct 2026 Under Consultation HGY/2026/2792

77 Wood Vale Hornsey London N10 3DL

Single storey extension, proposed first floor side extension, conversion of a garage to habitable room and enlargement of existing rear dormer

Householder planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2812

128 Osier Crescent Hornsey London N10 1RF

Erection of single storey rear extension with 2 no. rooflights, replacement of ground floor front elevation windows

Householder planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2819

116 Beresford Road Hornsey London N8 0AH

Demolition of the existing single-storey rear extension and erection of a single-storey rear extension with an infill side extension

Householder planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2743

5 Barratt Avenue Wood Green London N22 7EZ

Single storey side infill extension.

Householder planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2808

71 Park View Road Tottenham London N17 9AX

Conversion of 5 bed house into 2 self contained flats including single storey rear extension

Full planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2807

Flat A 28 Middle Lane Hornsey London N8 8PL

Replacement of the roof covering to match the existing roof covering.

Full planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2769

110 Lealand Road Tottenham London N15 6JT

Erection of Type 3 roof extension

Householder planning permission Haringey
12 Oct 2026 Under Consultation HGY/2026/2741

101A South View Road Hornsey London N8 7LX

Construction of a rear dormer extension including rooflights to the front.

Full planning permission Haringey
9 Oct 2026 Under Consultation HGY/2026/2798

2 Cromwell Court Cromwell Avenue Hornsey London N6 5HH

Installation of a new window at first floor level and installation of one ground floor level external air conditioning inverter unit with associated c...

Full planning permission Haringey
9 Oct 2026 Approved 14 Oct HGY/2026/2795

112 Carlingford Road Tottenham London N15 3ER

Certificate of Lawfulness (proposed) for rear dormer loft conversion and front velux rooflights

Lawful development Haringey
9 Oct 2026 Under Consultation HGY/2026/2793

Derwen Compton Avenue Hornsey London N6 4LH

Retention and modifications to the front and side facades, the erection of a two-storey rear extension, extended crown roof to include attic accommoda...

Full planning permission Haringey
8 Oct 2026 Under Consultation HGY/2026/2790

92-94 Wargrave Avenue London N15 6UA

Erection of first floor joint rear extension

Householder planning permission Haringey
8 Oct 2026 Under Consultation HGY/2026/2785

19 Holmesdale Road Hornsey London N6 5TH

Alterations to the existing dwelling, including replacement windows and doors, alterations to existing openings within the rear extension and reinstat...

Householder planning permission Haringey
8 Oct 2026 Under Consultation HGY/2026/2633

3 Claremont Road Hornsey London N6 5DA

Installation of a bicycle store

Householder planning permission Haringey
7 Oct 2026 Under Consultation HGY/2026/2408

7 Lockmead Road Tottenham London N15 6BX

Single storey rear/ side extension.

Householder planning permission Haringey
7 Oct 2026 Under Consultation HGY/2026/2778

1 Rose Place The Broadway Hornsey London N8 9SU

Erection of roof extension to existing single-dwelling-house (Resubmission of HGY/2024/0065)

Householder planning permission Haringey
7 Oct 2026 Under Consultation HGY/2026/2777

2 Rose Place The Broadway Hornsey London N8 9SU

Erection of 2nd floor roof extension to create an additional habitable room, and roof terrace

Householder planning permission Haringey
7 Oct 2026 Under Consultation HGY/2026/2577

195 Albert Road Wood Green London N22 7AQ

Proposed single storey side/rear extension

Full planning permission Haringey
7 Oct 2026 Under Consultation HGY/2026/2656

1 Library Court 391 High Road Tottenham London N17 6QN

Replacement of the timber front and side elevation windows with double glazed 'slimline' timber windows with vertical sliding sash and casement window...

Full planning permission Haringey
6 Oct 2026 Under Consultation HGY/2026/2762

33 Cecil Road Hornsey London N10 2BU

Replacement of windows and garden doors, demolition of metal staircase, installation of side elevation balustrade, installation of PV panels to rear r...

Householder planning permission Haringey
6 Oct 2026 Under Consultation HGY/2026/2766

6 Franklin Street Tottenham London N15 6QH

Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be 3.5m and for...

Prior approval Part 1 Class A.1(ea) Haringey
6 Oct 2026 Under Consultation HGY/2026/2765

110 Lealand Road Tottenham London N15 6JT

Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be 3m and for w...

Prior approval Part 1 Class A.1(ea) Haringey
6 Oct 2026 Under Consultation HGY/2026/1559

11 Daleview Road Tottenham London N15 6PL

Replacement of existing timber windows with uPVC double-glazed windows in the front, side and rear elevations.

Full planning permission Haringey
5 Oct 2026 Under Consultation HGY/2026/2753

153 Farrant Avenue Wood Green London N22 6PG

500mm addition to existing rear extension, installation of 3no. conservation style rooflights to facilitate loft conversion

Householder planning permission Haringey
5 Oct 2026 Under Consultation HGY/2026/2744

45 Woodfield Way Wood Green London N11 2NR

Single-storey garden room in the rear garden of the property, replacing the existing garage

Householder planning permission Haringey
5 Oct 2026 Under Consultation HGY/2026/2541

132 Vartry Road Tottenham London N15 6HA

Erection of a single storey rear/side extension, together with the installation of a Sukkah roof

Householder planning permission Haringey
5 Oct 2026 Under Consultation HGY/2026/2640

Ground Floor Flat 33 Avenue Road Hornsey London N6 5DF

single storey side and rear extension

Full planning permission Haringey
5 Oct 2026 Under Consultation HGY/2026/2072

103 Broad Lane Tottenham London N15 4DW

Second floor extension with associated gable ended roof extension to include the creation of a self-contained flat

Householder planning permission Haringey
2 Oct 2026 Valid HGY/2026/2737

Club 5 Bruce Grove Tottenham London N17 6RA

Part demolition and reconstruction of the ground floor extension; conversion of the ground floor into 2 no. self-contained residential units; associat...

Full planning permission Haringey
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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 Haringey?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Haringey. You can also narrow the alert to a postcode, street, or drawn area.

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