House extensions in Southend

Southend received 695 householder applications in the last 12 months - about 13 a week. Rear extensions and dormers are the most common. Of the 573 decided so far, 491 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 171 applications
22 Oct 2026 Registered 26/01371/FUL

24A Satanita Road Westcliff-on-sea Essex SS0 8DE

Erect balcony and external staircase to rear

Full Application Southend
21 Oct 2026 Registered 26/01375/FULH

25A Gipson Park Close Eastwood Essex SS9 5PW

Erect two storey side extension and new porch to front

Full Application - Householder Southend
20 Oct 2026 Registered 26/01318/FULH

70 Manchester Drive Leigh-on-sea Essex SS9 3HR

Erect single storey and part two storey rear extension, alteration to front elevation

Full Application - Householder Southend
19 Oct 2026 Registered 26/01362/GPDE

126 Blenheim Crescent Leigh-on-sea Essex SS9 3DX

Erect single storey rear extension projecting 4m beyond the existing rear wall of the dwelling, 2.1m high to eaves and with a maximum height of 2.4m

General Permitted Dev (Extensions) Southend
19 Oct 2026 Registered 26/01370/FULH

53 The Broadway Thorpe Bay Southend-on-sea Essex SS1 3HG

Erect hip-to-gable roof extension with rear dormer and front rooflights to form habitable accommodation in the loftspace, erect two storey front exten...

Full Application - Householder Southend
19 Oct 2026 Registered 26/01368/GPDE

36 Trinity Road Southend-on-sea Essex SS2 4HJ

Erect single-storey rear extension projecting 4.984m beyond the existing rear wall of the dwelling, 3.05m high to eaves and with a maximum height of 3...

General Permitted Dev (Extensions) Southend
19 Oct 2026 Registered 26/01314/FULH

10 Bellhouse Road Eastwood Leigh-On-Sea Essex SS9 5NL

Install two dormers and rooflight to front, and roof extension to rear, to form additional accommodation in the roofspace

Full Application - Householder Southend
17 Oct 2026 Registered 26/01361/FULH

23 Park View Drive Leigh-on-sea Essex SS9 4TU

Erect single storey rear extension

Full Application - Householder Southend
17 Oct 2026 Registered 26/01360/GPDE

230 Central Avenue Southend-on-sea Essex SS2 4EB

Erect single storey rear extension projecting 4.9m beyond the existing rear wall of the dwelling, 3m high to eaves and with a maximum height of 3m

General Permitted Dev (Extensions) Southend
15 Oct 2026 Registered 26/01355/FULH

48 Hobleythick Lane Westcliff-on-sea Essex SS0 0RH

Extend existing vehicle crossover onto Hobleythick Lane

Full Application - Householder Southend
15 Oct 2026 Registered 26/01351/FULH

113 Dawlish Drive Leigh-on-sea Essex SS9 1QS

Erect single storey rear extension, alteration to side elevation

Full Application - Householder Southend
15 Oct 2026 Registered 26/01350/CLP

113 Dawlish Drive Leigh-on-sea Essex SS9 1QS

Dormer to rear to form habitable accommodation in the roof space and rooflights to front elevation (Certificate of Lawful Development - Proposed)

Certificate of Lawfulness (Proposed) Southend
14 Oct 2026 Registered 26/01320/FULH

135 Mendip Crescent Westcliff-on-sea Essex SS0 0HG

Erect single storey rear extension and relocate shed

Full Application - Householder Southend
13 Oct 2026 Registered 26/01343/FULH

53 High Cliff Drive Leigh-on-sea Essex SS9 1DQ

Erect first floor rear extension

Full Application - Householder Southend
13 Oct 2026 Registered 26/01339/CLP

18 Surbiton Road Southend-on-sea Essex SS2 4NS

Dormer to rear with juliette balcony and rooflights to front to form habitable accommodation in the loftspace (certificate of lawful development - pro...

Certificate of Lawfulness (Proposed) Southend
13 Oct 2026 Registered 26/01342/FULH

37 Leasway Westcliff-on-sea Essex SS0 8PA

Erect part single part two storey rear extension with rooflight, alteration to side elevation

Full Application - Householder Southend
13 Oct 2026 Registered 26/01340/FULH

4 Prittlewell Square Southend-on-sea Essex SS1 1DW

Erect single storey rear extension with rooflights to lower ground floor, terrace to ground floor over rear extension, patio to front elevation

Full Application - Householder Southend
13 Oct 2026 Registered 26/01288/BC3

Cycle Shelter North Of Leigh Station Belton Way West Leigh-on-sea Essex

Relocate existing secure cycle shelter from Belfairs Sports Ground to Leigh-on-Sea station

Borough Council Regulation 3 Southend
12 Oct 2026 Registered 26/01336/GPDE

92 Briarwood Drive Leigh-on-sea Essex SS9 4LD

Erect single-storey rear extension projecting 6m beyond the existing rear wall of the dwelling, 2.5m high to eaves and with a maximum height of 3m

General Permitted Dev (Extensions) Southend
12 Oct 2026 Registered 26/01335/CLP

92 Briarwood Drive Leigh-on-sea Essex SS9 4LD

Dormer to rear, rooflights to front and window to side to form habitable accommodation in the loftspace (Lawful Development Certificate - Proposed)

Certificate of Lawfulness (Proposed) Southend
12 Oct 2026 Registered 26/01333/FULH

94 Cliffsea Grove Leigh-on-sea Essex SS9 1NQ

Raise ridge height, hip to gable roof extension to front and dormer to rear to form habitable accommodation in the loftspace, alter elevations

Full Application - Householder Southend
12 Oct 2026 Registered 26/01300/FUL

114A Woodfield Road Leigh-on-sea Essex SS9 1ET

Form roof terrace with glazed balustrades and install access rooflight

Full Application Southend
9 Oct 2026 Registered 26/01325/CLP

92 Vardon Drive Leigh-on-sea Essex SS9 3SQ

Hip to gable roof extension with dormer to rear to form habitable accommodation in the roofspace, rooflights to front elevation (Amended Proposal) (La...

Certificate of Lawfulness (Proposed) Southend
9 Oct 2026 Registered 26/01327/FULH

17 Station Road Leigh-on-sea Essex SS9 1ST

Demolish conservatory, erect single storey rear/side extension

Full Application - Householder Southend
9 Oct 2026 Registered 26/01328/FULH

3 St Davids Drive Leigh-on-sea Essex SS9 3RQ

Demolish detached garage and rear patio, erect single storey rear extension with 3 rooflights, erect single storey side extension to provide new garag...

Full Application - Householder Southend
9 Oct 2026 Registered 26/01326/GPDE

94 Cliffsea Grove Leigh-on-sea Essex SS9 1NQ

Erect single storey rear extension projecting 5.98m beyond the existing rear wall of the dwelling, 3m high to eaves and with a maximum height of 3.3m

General Permitted Dev (Extensions) Southend
7 Oct 2026 Registered 26/01309/FULH

33 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

Raise ridge to form habitable accommodation in loftspace with dormer to rear and rooflights to front, install solar PV panels to roof, demolish conser...

Full Application - Householder Southend
7 Oct 2026 Registered 26/01293/FULH

17 Vernon Road Leigh-on-sea Essex SS9 2NG

Erect single storey rear extension with rooflights, alterations to side elevation

Full Application - Householder Southend
6 Oct 2026 Registered 26/01292/LBC

South Shoebury Hall Farm Ness Road Shoeburyness Southend-on-sea Essex SS3 9DN

Remove existing fitted wardrobes and associated fitted furniture in bedrooms 1 and 2; remove existing en-suite shower room and associated modern fitti...

Listed Building Consent Southend
5 Oct 2026 Registered 26/01298/FULH

38 Bishopsteignton Shoeburyness Essex SS3 8AF

Demolish existing conservatory, erect single storey rear extension with roof lantern and single storey front extension with rooflight

Full Application - Householder Southend
5 Oct 2026 Registered 26/01301/FULH

62 Undercliff Gardens Leigh-on-sea Essex SS9 1EA

Erect single storey rear extension with new retaining wall and internal staircase

Full Application - Householder Southend
2 Oct 2026 Registered 26/01297/FULH

149 Southchurch Boulevard Southend-on-sea Essex SS2 4UR

Convert existing garage into habitable accommodation, erect single storey rear extension with rooflight, alterations to elevations

Full Application - Householder Southend
2 Oct 2026 Registered 26/01296/FUL

Chadwick Lodge 8 Chadwick Road Westcliff-on-sea Essex SS0 8LS

Extend existing detached outbuilding to rear (part-retrospective)

Full Application Southend
2 Oct 2026 Registered 26/01291/LBC

South Shoebury Hall Farm Ness Road Shoeburyness Southend-on-sea Essex SS3 9DN

Install security railings above the existing boundary wall fronting Ness Road and replace existing pedestrian gate, replace existing vehicle gate at t...

Listed Building Consent Southend
2 Oct 2026 Registered 26/01272/FULH

64 Undercliff Gardens Leigh-on-sea Essex SS9 1EA

Erect single storey garden room to north elevation, install new vehicle crossover onto Grand Parade

Full Application - Householder Southend
2 Oct 2026 Registered 26/01227/CLP

26 Belle Vue Road Southend-on-sea Essex SS2 4JF

Porch to front (certificate of lawful development - proposed)

Certificate of Lawfulness (Proposed) Southend
2 Oct 2026 Registered 26/01283/FUL

138 - 140 Hamlet Court Road Westcliff-on-sea Essex SS0 7LW

Install internal secondary glazing to eleven windows on principal elevation and restore existing steel framed Crittall windows

Full Application Southend
1 Oct 2026 Registered 26/01201/GPDE

52 Wimborne Road Southend-on-sea Essex SS2 5JF

Erect single storey rear extension projecting 4.2m beyond the existing rear wall of the dwelling, 3m high to eaves and with a maximum height of 3.3m

General Permitted Dev (Extensions) Southend
30 Sept 2026 Registered 26/01285/BC4

Earls Hall Primary School Carlton Avenue Westcliff-on-sea Essex SS0 0QN

Erect first floor extension to east wing of main school building, create enclosed external learning space to rear and install access ramps to rear and...

Borough Council Regulation 4 Southend
29 Sept 2026 Registered 26/01277/CLP

24 Stromness Road Southend-on-sea Essex SS2 4JQ

Dormer to rear, rooflights to front to form habitable accommodation in the loft space, change of use from dwellinghouse (Class C3) to 6 person HMO (Cl...

Certificate of Lawfulness (Proposed) Southend
29 Sept 2026 Registered 26/01281/CLP

88 Ennismore Gardens Southend-on-sea Essex SS2 5RB

Hip to gable roof extension, dormer to rear with juliette balcony and rooflights to front to form habitable accommodation in the loftspace, extend soi...

Certificate of Lawfulness (Proposed) Southend
29 Sept 2026 Registered 26/01273/FULH

47 Bonchurch Avenue Leigh-on-sea Essex SS9 3AR

Demolish existing conservatory to rear and garage to side, erect single storey side extension

Full Application - Householder Southend
29 Sept 2026 Registered 26/01280/FULH

31 Sutherland Boulevard Leigh-on-sea Essex SS9 3PT

Demolish existing single storey rear extensions and side garage, erect single storey side and rear extensions with rooflights

Full Application - Householder Southend
29 Sept 2026 Registered 26/01276/FULH

26 Danescroft Drive Leigh-on-sea Essex SS9 4NR

Erect fence to front (retrospective)

Full Application - Householder Southend
28 Sept 2026 Registered 26/01268/FULH

23 Westcliff Drive Leigh-on-sea Essex SS9 2LB

Raise roof and erect dormer to side to form habitable accommodation in the loftspace, erect part single/part two storey rear and side extensions with ...

Full Application - Householder Southend
28 Sept 2026 Registered 26/01275/CLP

33 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

Demolish conservatory, single storey rear extension, alter elevations, remove rear chimney stack, install detached outbuilding and heat pump to rear g...

Certificate of Lawfulness (Proposed) Southend
28 Sept 2026 Registered 26/01267/FULH

34 Waterford Road Shoeburyness Southend-on-sea Essex SS3 9HH

Erect attached garden room to rear

Full Application - Householder Southend
28 Sept 2026 Registered 26/01226/FULH

113 Salisbury Road Leigh-on-sea Essex SS9 2JN

Demolish existing rear extension and conservatory, erect single storey rear extension

Full Application - Householder Southend
25 Sept 2026 Registered 26/01260/FULH

1 Shakespeare Drive Westcliff-on-sea Essex SS0 9AA

Erect single storey side/rear extension

Full Application - Householder Southend
25 Sept 2026 Registered 26/01259/CLP

86 St James Avenue Thorpe Bay Essex SS1 3LJ

Single storey rear extension (certificate of lawful development - proposed)

Certificate of Lawfulness (Proposed) Southend
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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 Southend?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Southend. You can also narrow the alert to a postcode, street, or drawn area.

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