House extensions in Worthing

Worthing received 385 householder applications in the last 12 months - about 7 a week. Rear extensions and dormers are the most common. Of the 303 decided so far, 281 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 86 applications
Yesterday Registered AWDM/1261/26

26 The Heights Worthing West Sussex BN14 0AJ

Application to vary condition 1 (Approved Plans) of AWDM/1602/25 to reduce roof pitch, revise the dormer and small gable on the front elevation, chang...

Removal of Condition Worthing
Yesterday Registered AWDM/1251/26

42 Boxgrove Worthing West Sussex BN12 6AR

Porch to South elevation

Householder Application Worthing
21 Oct 2026 Awaiting decision AWDM/1246/26

13 Madeira Avenue Worthing West Sussex BN11 2AT

Application for Certificate of Lawfulness for Proposed single storey rear extension (to replace existing conservatory)

Certificate Proposed Lawful Use/Dev Worthing
20 Oct 2026 Approved 26 Oct AWDM/1237/26

92 Singleton Crescent Worthing West Sussex BN12 5DJ

Application for Certificate of Lawfulness for proposed single storey rear extension

Certificate Proposed Lawful Use/Dev Worthing
19 Oct 2026 Registered AWDM/1224/26

245 Brighton Road Worthing West Sussex BN11 2EY

Amalgamation of two existing self-contained flats to revert the property to a single family dwellinghouse

Full Application Worthing
19 Oct 2026 Registered AWDM/1194/26

32 Montague Street Worthing West Sussex BN11 3HA

Change of use of upper floors from commercial (Use Class E) to two residential flats (Use Class C3) with widened ground floor entrance and rooflights

Full Application Worthing
16 Oct 2026 Approved 23 Oct AWDM/1220/26

152 Terringes Avenue Worthing West Sussex BN13 1JP

Application for Certificate of Lawfulness for proposed loft conversion with rear dormer with Juliet balcony and front rooflights.

Certificate Proposed Lawful Use/Dev Worthing
16 Oct 2026 Approved 26 Oct AWDM/1216/26

56 Dominion Road Worthing West Sussex BN14 8JT

Application for Certificate of Lawfulness for single storey side extension

Certificate Proposed Lawful Use/Dev Worthing
14 Oct 2026 Awaiting decision AWDM/1205/26

21 St Georges Road Worthing West Sussex BN11 2DS

Application for Certificate of Lawfulness for Proposed loft conversion with rear dormers to main and outrigger roofslopes and front rooflights; first ...

Certificate Proposed Lawful Use/Dev Worthing
13 Oct 2026 Registered AWDM/1192/26

29 Beechwood Avenue Worthing West Sussex BN13 2HR

Rooms in roof with hip to gable roof extension, rear dormer and front rooflights

Householder Application Worthing
12 Oct 2026 Registered AWDM/1184/26

Methodist Church Tarring Road Worthing West Sussex BN11 4ET

1.8m high security fencing incorporating gates and freestanding hedging in planters, covered timber walkway, installation of an exterior light above e...

Full Application Worthing
12 Oct 2026 Registered AWDM/1074/26

7A Bath Place Worthing West Sussex BN11 3BA

Replacement of rear-facing 2no. timber doors and 4no. timber windows with metal doors and windows (retrospective)

Full Application Worthing
9 Oct 2026 Registered AWDM/0964/26

24 - 25 Marine Parade Worthing West Sussex

Replacement of existing front and rear uPVC windows and reintroduction of third floor window (retrospective).

Full Application Worthing
9 Oct 2026 Registered AWDM/1190/26

53 Longlands Worthing West Sussex BN14 9NW

Two storey rear extension; single storey side extensions to the east and west; conversion and remodelling of the existing garage to ancillary habitabl...

Householder Application Worthing
8 Oct 2026 Registered AWDM/1077/26

6 Daisy Road Worthing West Sussex BN13 3FS

Proposed rear conservatory (retrospective).

Householder Application Worthing
7 Oct 2026 Awaiting decision AWDM/1117/26

11 Moorfoot Road Worthing West Sussex BN13 2EY

Proposed single storey front extension; timber pergola and fencing adjacent to northern and western site boundaries (part retrospective)

Householder Application Worthing
7 Oct 2026 Registered AWDM/1177/26

15 Sea Lane Worthing West Sussex BN12 4QB

Proposed 2-storey side extension, single storey front and rear extensions & additional vehicular access

Householder Application Worthing
6 Oct 2026 Registered AWDM/0741/26

83 Poulters Lane Worthing West Sussex BN14 7SX

Single-storey detached garden outbuilding

Full Application Worthing
5 Oct 2026 Registered AWDM/1172/26

25 St Wilfreds Road Worthing West Sussex BN14 8BA

Single storey rear extension

Householder Application Worthing
2 Oct 2026 Awaiting decision AWDM/1167/26

The Cottage Heene Place Worthing West Sussex BN11 3NL

Single storey rear extension to replace existing conservatory.

Householder Application Worthing
2 Oct 2026 Registered AWDM/1164/26

79 Orchard Avenue Worthing West Sussex BN14 7QB

Single storey rear / side extension and front car port to replace existing side garage

Householder Application Worthing
1 Oct 2026 Registered AWDM/1158/26

55 Sullington Gardens Worthing West Sussex BN14 0HS

Single storey rear extension with raised patio and privacy walls; front porch and roof overhang; and roof extensions consisting of raising ridge heigh...

Householder Application Worthing
29 Sept 2026 Registered AWDM/0942/26

4 Aldwick Crescent Worthing West Sussex BN14 0AR

Single-storey rear extension, new front drive, and extension to roof of garage.

Householder Application Worthing
29 Sept 2026 Registered AWDM/0780/26

48 Offington Lane Worthing West Sussex BN14 9RT

First floor rear extension with Juliet balcony

Householder Application Worthing
28 Sept 2026 Registered AWDM/1131/26

25 - 27 Montague Street Worthing West Sussex BN11 3BE

Change of use of upper floors from commercial (Class E) to 6 No. residential flats; shopfront alterations to create a new entrance; and insertion of r...

Full Application Worthing
28 Sept 2026 Awaiting decision AWDM/1091/26

34 Boxgrove Worthing West Sussex BN12 6BB

Proposed two storey extension

Householder Application Worthing
24 Sept 2026 Approved 29 Sep AWDM/1140/26

Westcroft Goring Street Worthing West Sussex BN12 5AN

Application for Certificate of Lawfulness for rear dormer and 3no. rooflights to front elevation

Certificate Proposed Lawful Use/Dev Worthing
23 Sept 2026 Registered AWDM/1133/26

22 West Street Worthing West Sussex BN11 3HD

Demolition of existing rear extension and construction of new single storey rear extension.

Householder Application Worthing
23 Sept 2026 Registered AWDM/1126/26

The Gatehouse 25 Warnham Road Worthing West Sussex BN12 4LL

Replacement of existing timber painted windows and doors with white UPVC and coated aluminium windows and doors

Householder Application Worthing
21 Sept 2026 Registered AWDM/1027/26

19 Wavertree Road Worthing West Sussex BN12 6DE

Removal of existing detached garage; subdivision of existing dwelling plot and erection of attached 2-storey house with frontage parking and cycle sto...

Full Application Worthing
21 Sept 2026 Approved 28 Sep AWDM/1128/26

26 Salvington Gardens Worthing West Sussex BN13 2BL

Application for Certificate of Lawfulness for hip to (East) side gable roof extension and rear (North) dormer

Certificate Proposed Lawful Use/Dev Worthing
21 Sept 2026 Registered AWDM/1127/26

Castle 7 The Strand Worthing West Sussex BN12 6DL

Retrospective application for the retention of a pergola over the entrance ramp and 1.8m-high slatted timber fencing along the eastern boundary and pa...

Full Application Worthing
18 Sept 2026 Awaiting decision AWDM/1076/26

40 Frobisher Way Worthing West Sussex BN12 6EX

Single storey rear extension

Householder Application Worthing
18 Sept 2026 Withdrawn 2 Oct AWDM/1119/26

The Cottage Heene Place Worthing West Sussex BN11 3NL

Application for Certificate of Lawfulness for proposed single storey rear extension.

Certificate Proposed Lawful Use/Dev Worthing
17 Sept 2026 Awaiting decision AWDM/1102/26

1 Coombe Rise Worthing West Sussex BN14 0ED

Householder application for permitted development for prior approval for single storey extension to rear of property measuring 6m from rear wall of th...

General Permitted Development Extensions Worthing
17 Sept 2026 Registered AWDM/1109/26

Westminster Court Brighton Road Worthing West Sussex

Replacement of 8no casement windows with automatic opening vents (AOVs) plus an additional AOV on side (east) elevation

Full Application Worthing
16 Sept 2026 Registered AWDM/1099/26

1 Furze Road Worthing West Sussex BN13 3BP

Single storey rear extension

Householder Application Worthing
16 Sept 2026 Awaiting decision AWDM/1098/26

14 Eirene Road Worthing West Sussex BN12 4DJ

Vehicular access onto Eirene Road and associated alterations to front boundary wall/pillars

Householder Application Worthing
15 Sept 2026 Awaiting decision AWDM/1089/26

Flat 31 Seabright West Parade Worthing West Sussex BN11 3QS

Replacement UPVC windows and door, south and east elevations at seventh floor.

Full Application Worthing
14 Sept 2026 Registered AWDM/1084/26

4 Waterworks Cottages Hill Barn Lane Worthing West Sussex BN14 9QQ

Proposed garage in rear garden

Householder Application Worthing
14 Sept 2026 Awaiting decision AWDM/1081/26

4 Vestry Place Tarring Worthing West Sussex BN13 1FD

Replacement Glazing to Ground and First Floor Flats (4 & 5 Vestry Place).

Full Application Worthing
11 Sept 2026 Awaiting decision AWDM/1066/26

35 Dominion Road Worthing West Sussex BN14 8JZ

Creation of a vehicle crossover and hard standing

Householder Application Worthing
11 Sept 2026 Approved 7 Oct AWDM/1072/26

67 Chesterfield Road Worthing West Sussex BN12 6BY

Semi permanent platform and ramp to provide wheelchair access to the front door

Householder Application Worthing
10 Sept 2026 Approved 23 Oct AWDM/1045/26

70 Hayling Rise Worthing West Sussex BN13 3AQ

Retrospective application for supplementary boundary treatment to a height of 2805mm to rear garden

Householder Application Worthing
9 Sept 2026 Registered AWDM/1059/26

7 Broomfield Avenue Worthing West Sussex BN14 7RY

Erection of a two-storey side extension and a single-storey rear extension.

Householder Application Worthing
8 Sept 2026 Registered AWDM/1056/26

48 Broomfield Avenue Worthing West Sussex BN14 7RZ

Erection of single-storey annexe for family member (following demolition of garage)

Householder Application Worthing
4 Sept 2026 Registered AWDM/1046/26

Arran Pines Avenue Worthing West Sussex BN14 9JQ

First-floor rear extension (over an existing ground-floor extension to the east elevation); and enlargement of the existing rear ground-floor extensio...

Householder Application Worthing
2 Sept 2026 Approved 9 Oct AWDM/1033/26

155 Heene Road Worthing West Sussex BN11 4NY

Amalgamation of two self-contained flats to form a single dwellinghouse, together with alterations to the ground-floor rear elevation comprising the i...

Full Application Worthing
1 Sept 2026 Approved 7 Oct AWDM/1008/26

75 Radnor Road Worthing West Sussex BN13 1DL

Proposed single-storey side extension

Householder Application Worthing
1 Sept 2026 Registered AWDM/0913/26

20 Hillside Avenue Worthing West Sussex BN14 9QS

Two storey rear extension

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

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