House extensions in Spelthorne

Spelthorne received 485 householder applications in the last 12 months - about 9 a week. Rear extensions and garage works are the most common. Of the 399 decided so far, 348 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 130 applications
Yesterday Awaiting decision 26/01034/HOU

39 Woodthorpe Road Ashford TW15 2RP

Erection of detached outbuilding following demolition of existing summerhouse to be used ancillary to the main residential house.

Householder Application Spelthorne
Yesterday Awaiting decision 26/01098/PDH

The Meadow Horton Road Stanwell Moor Staines-upon-Thames TW19 6BQ

Prior Approval Notification for a single storey rear extension extending 8 metres beyond the rear wall of the original dwellinghouse with a maximum he...

PD Householder Prior Approval Spelthorne
21 Oct 2026 Awaiting decision 26/01103/CPD

32 Tudor Road Ashford TW15 1QW

Certificate of Lawfulness for the Proposed Development of a loft conversion with hip to gable roof extension, rear facing dormer window and front faci...

Cert. of Lawful Proposed Use and Dev Spelthorne
21 Oct 2026 Awaiting decision 26/01099/CPD

The Meadow Horton Road Stanwell Moor Staines-upon-Thames TW19 6BQ

Certificate of Lawfulness for the proposed loft conversion facilitated by two hip-to-gable extensions, 1 no. rear facing dormer, and 2 no. rooflights ...

Cert. of Lawful Proposed Use and Dev Spelthorne
20 Oct 2026 Awaiting decision 26/01090/HOU

12 Manor Park Staines-upon-Thames TW18 4XE

Garage conversion into habitable space, facilitated by the bricking up of shutter door and 2 no. replacement windows and 2 no. rooflights in garage ro...

Householder Application Spelthorne
14 Oct 2026 Awaiting decision 26/01055/RVC

62 The Avenue Sunbury-on-Thames TW16 5ES

Development without compliance with Conditions 2 (approved plans) and 3 (approved materials) imposed upon planning permission 24/01183/HOU for the ere...

Removal or Variation of Condition Spelthorne
13 Oct 2026 Awaiting decision 26/01028/HOU

7 Ashurst Drive Shepperton TW17 0JH

Erection of part two storey part single storey rear extension first floor side extension and mono pitched roof across frontage.

Householder Application Spelthorne
12 Oct 2026 Awaiting decision 26/01071/HOU

22 New Park Road Ashford TW15 1EG

Erection of a single storey rear extension

Householder Application Spelthorne
12 Oct 2026 Awaiting decision 26/01073/HOU

12 Harrison Way Shepperton TW17 0BE

Loft conversion facilitated by the erection of 1 no. rear facing dormer and 2 no. rooflights on front roof slope.

Householder Application Spelthorne
12 Oct 2026 Awaiting decision 26/01038/HOU

64 Napier Road Ashford TW15 1TG

Ground floor infill extension, first floor front extension, first floor rear extension and loft conversion with dormers

Householder Application Spelthorne
9 Oct 2026 Awaiting decision 26/01068/FUL

St Pauls College The Ridings Sunbury-on-Thames TW16 6NX

New opening to heritage wall - to include part demolition of an existing garage, new landscaping, paths and external works

Full Application Spelthorne
9 Oct 2026 Awaiting decision 26/01062/CPD

83 Wolsey Road Sunbury-on-Thames TW16 7TX

Certificate of Lawfulness for the proposed development of an outbuilding

Cert. of Lawful Proposed Use and Dev Spelthorne
8 Oct 2026 Awaiting decision 26/01037/HOU

24 Avondale Avenue Staines-upon-Thames TW18 2PN

Erection of a single storey rear infill extensions.

Householder Application Spelthorne
7 Oct 2026 Awaiting decision 26/01056/HOU

96 Penton Road Staines-upon-Thames TW18 2LJ

Erection of a two-storey side extension with associated roof extension. Single storey front, side and rear extension. Rear first-floor balcony. Extern...

Householder Application Spelthorne
6 Oct 2026 Awaiting decision 26/00969/HOU

153 Kingston Road Staines-upon-Thames TW18 1PB

Erection of a first floor side extension

Householder Application Spelthorne
5 Oct 2026 Awaiting decision 26/01046/FUL

The Mill Horton Road Stanwell Moor Staines-upon-Thames TW19 6BF

Provision of a grasscrete parking area.

Full Application Spelthorne
5 Oct 2026 Awaiting decision 26/01029/HOU

33 Ashgrove Road Ashford TW15 1NS

Erection of proposed first floor extension to create two storey dwellinghouse, single storey side and rear extensions and new front porch.

Householder Application Spelthorne
5 Oct 2026 Awaiting decision 26/00992/HOU

32 Cherry Way Shepperton TW17 8QG

Erection of two storey side extension, single storey rear extension, and dormer window to rear roof elevation.

Householder Application Spelthorne
5 Oct 2026 Awaiting decision 26/01049/CPD

58 Penton Avenue Staines-upon-Thames TW18 2ND

Certificate of Lawfulness for the proposed erection of a single storey side extension, and single storey rear extension. Following removal of existing...

Cert. of Lawful Proposed Use and Dev Spelthorne
5 Oct 2026 Awaiting decision 26/01020/HOU

319 Feltham Hill Road Ashford TW15 1LP

Loft conversion to create habitable space facilitated by front and rear hip to gable extension, 2 no. flank dormers and 2 no. rooflights. Single store...

Householder Application Spelthorne
2 Oct 2026 Awaiting decision 26/01039/HOU

Magnolia Lodge 2 The Crescent Ashford TW15 2SU

Erection of single storey rear extension

Householder Application Spelthorne
2 Oct 2026 Awaiting decision 26/01045/PDH

37 Cecil Road Ashford TW15 1RJ

Prior approval notification for a single storey rear extension measuring 6 metres in depth beyond the rear wall of the original dwelling house measuri...

PD Householder Prior Approval Spelthorne
2 Oct 2026 Awaiting decision 26/01040/CPD

72 Waters Drive Staines-upon-Thames TW18 4RN

Certificate of lawfulness for proposed conversion of garage to habitable room.

Cert. of Lawful Proposed Use and Dev Spelthorne
2 Oct 2026 Awaiting decision 26/01041/HOU

66 Knightsbridge Crescent Staines-upon-Thames TW18 2QR

Erection of a single storey rear extension following removal of existing conservatory and store.

Householder Application Spelthorne
2 Oct 2026 Awaiting decision 26/01042/HOU

32 Tudor Road Ashford TW15 1QW

Proposed single storey rear / side extension and entrance porch following demolition of detached garage

Householder Application Spelthorne
2 Oct 2026 Awaiting decision 26/00983/FUL

108 Vicarage Road Sunbury-on-Thames TW16 7QX

Erection of timber fence behind existing hedge to front garden and installation of a buggy store.

Full Application Spelthorne
1 Oct 2026 Awaiting decision 26/01035/FUL

Bombay Nnakka 151 High Street Staines-upon-Thames TW18 4PA

Self Containment and Internal Alterations to an Existing Bedsitting Room Unit

Full Application Spelthorne
1 Oct 2026 Awaiting decision 26/00991/FUL

1 Lavender House 1 Eden Grove Staines-upon-Thames Surrey TW18 4ZU

Removal of glazed panel and install louvred panel

Full Application Spelthorne
1 Oct 2026 Awaiting decision 26/01033/HOU

17A Mornington Road Ashford TW15 1NP

Removal of the existing side garage and erection of a single-storey side extension.

Householder Application Spelthorne
1 Oct 2026 Awaiting decision 26/01031/HOU

50 Village Way Ashford TW15 2LB

Erection of a single storey rear extension following removal of existing kitchen extension. Garage conversion into habitable space.

Householder Application Spelthorne
30 Sept 2026 Awaiting decision 26/01021/HOU

Nyumbani Felix Lane Shepperton TW17 8NN

Erection of a single storey side/rear extension with gable end roof on the southern side (following demolition of existing attached single storey stru...

Householder Application Spelthorne
30 Sept 2026 Awaiting decision 26/01030/CPD

11 Mornington Road Ashford TW15 1NP

Certificate of Lawfulness for the proposed development of a single storey rear extension.

Cert. of Lawful Proposed Use and Dev Spelthorne
28 Sept 2026 Awaiting decision 26/01008/HOU

120 Laleham Road Staines-upon-Thames TW18 2NP

Proposed dropped kerb and a driveway

Householder Application Spelthorne
28 Sept 2026 Awaiting decision 26/00953/HOU

11 Gaston Bridge Road Shepperton TW17 8HH

Erection of first floor side extension, and single storey rear extension

Householder Application Spelthorne
28 Sept 2026 Awaiting decision 26/01007/HOU

35 Birch Grove Shepperton TW17 8SS

Raise the height of the existing roof, conversion of internal space to new habitable rooms and erection of rear facing dormer with rooflights to the f...

Householder Application Spelthorne
28 Sept 2026 Awaiting decision 26/01006/PDH

35 Birch Grove Shepperton TW17 8SS

Prior Approval Notification for a single storey rear extension extending 8 metres beyond the rear wall of the original dwellinghouse with a maximum he...

PD Householder Prior Approval Spelthorne
25 Sept 2026 Awaiting decision 26/01005/HOU

44 Catherine Drive Sunbury-on-Thames TW16 7TG

Proposed single storey rear/side extension

Householder Application Spelthorne
25 Sept 2026 Awaiting decision 26/01002/HOU

Erasmus House Church Square Shepperton TW17 9JY

Proposed alterations including soft and hard landscaping, removal of existing garden fence along with the installation of a new timber gate and fencin...

Householder Application Spelthorne
25 Sept 2026 Awaiting decision 26/00999/FUL

Venture House 42 London Road Staines-upon-Thames TW18 4HF

Construction of a two storey extension at roof level consisting of 9 no. self-contained residential units (Use Class C3), provision of car parking, cy...

Full Application Spelthorne
25 Sept 2026 Awaiting decision 26/01000/CPD

19 Aspen Gardens Ashford TW15 1ED

Certificate of Lawfulness for the proposed erection of a single storey rear extension with roof lantern. Following removal of existing conservatory.

Cert. of Lawful Proposed Use and Dev Spelthorne
23 Sept 2026 Approved 21 Oct 26/00996/PDH

19 Hannibal Road Stanwell Staines-upon-Thames TW19 7HG

Prior Approval Notification for a single storey rear extension extending 6.0 metres beyond the rear wall of the original house, with a maximum height ...

PD Householder Prior Approval Spelthorne
23 Sept 2026 Awaiting decision 26/00994/HOU

30 Staines Road Laleham Staines-upon-Thames TW18 2TE

Erection of a detached garage to the front of the dwelling.

Householder Application Spelthorne
23 Sept 2026 Awaiting decision 26/00993/HOU

30 Staines Road Laleham Staines-upon-Thames TW18 2TE

Erection of a single storey side and rear wraparound extension with two roof lanterns. 3 no. rooflights over existing kitchen. Following removal of ex...

Householder Application Spelthorne
23 Sept 2026 Awaiting decision 26/00995/CPD

8 Sandells Avenue Ashford TW15 1AJ

Certificate of lawfulness for proposed development for dormer windows to each side roof elevation, and solar panels on flat roofs of the dormers

Cert. of Lawful Proposed Use and Dev Spelthorne
17 Sept 2026 Awaiting decision 26/00844/FUL

7 Marlborough Road Ashford TW15 3PZ

Erection of a single storey side extension and conversion of the existing side/rear extension to create a self-contained flat with a sub-division of t...

Full Application Spelthorne
17 Sept 2026 Awaiting decision 26/00971/CPD

9 Avondale Avenue Staines-upon-Thames TW18 2PT

Certificate of Lawfulness for proposed development for a garage conversion to habitable accommodation facilitated by replacement of existing garage do...

Cert. of Lawful Proposed Use and Dev Spelthorne
17 Sept 2026 Awaiting decision 26/00946/FUL

373-367B Staines Road West And 2-4 Cecil Road Ashford TW15 1RP

Extensions and re-configuration of existing buildings including a first floor infill extension on the eastern side along with associated refuse and cy...

Full Application Spelthorne
16 Sept 2026 Awaiting decision 26/00959/HOU

8 Govett Avenue Shepperton TW17 8AA

Single storey rear extension with associated internal alterations

Householder Application Spelthorne
16 Sept 2026 Awaiting decision 26/00966/HOU

34 Cumberland Road Ashford TW15 3BX

Erection of a first floor rear extension and new flat roof on existing ground floor rear protrusion

Householder Application Spelthorne
14 Sept 2026 Awaiting decision 26/00964/FUL

73 - 75 High Street Staines-upon-Thames TW18 4PP

Extensions and reconfiguration of the existing building, including the erection of a part first floor/part second floor rear extension and the constru...

Full Application Spelthorne
Recency
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2-4 weeks
1-2 months
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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 Spelthorne?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Spelthorne. You can also narrow the alert to a postcode, street, or drawn area.

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