House extensions in Stevenage

Stevenage received 217 householder applications in the last 12 months - about 4 a week. Rear extensions and garage works are the most common. Of the 159 decided so far, 143 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 61 applications
21 Oct 2026 Awaiting decision 26/00758/CLPD

23 Bandley Rise Stevenage Herts SG2 9LS

Lawful Development Certificate (Proposed) for use of land for siting a mobile home for purposes ancillary to the main dwelling

Cert. of Lawful PROPOSED development Stevenage
21 Oct 2026 Awaiting decision 26/00757/FPH

2 Chouler Gardens Stevenage Herts SG1 4TB

Single storey rear extension.

Householder Applications Stevenage
13 Oct 2026 Awaiting decision 26/00749/FPH

6 Orchard Crescent Stevenage Herts SG1 3EW

Two storey side and rear extension to create rear gable projection and repositioning of chimney. Single storey side and rear extensions. Porch extensi...

Householder Applications Stevenage
12 Oct 2026 Awaiting decision 26/00747/FPH

437 Vardon Road Stevenage Herts SG1 5BB

Single storey rear extension and part conversion of garage to habitable accommodation

Householder Applications Stevenage
12 Oct 2026 Awaiting decision 26/00744/FPH

330 Canterbury Way Stevenage Herts SG1 4DU

Two storey side extension, single storey front extension and garage conversion to facilitate the addition of a self contained annexe.

Householder Applications Stevenage
8 Oct 2026 Awaiting decision 26/00740/FPH

48 Whitney Drive Stevenage Herts SG1 4BJ

Erection of 1.8m high fence to front and side of house

Householder Applications Stevenage
8 Oct 2026 Awaiting decision 26/00739/FPH

45 Shackleton Spring Stevenage Herts SG2 9DF

Erection of single storey rear extension and front fenestration alteration

Householder Applications Stevenage
7 Oct 2026 Awaiting decision 26/00738/FPH

109 Minehead Way Stevenage Herts SG1 2JH

Erection of first floor rear extension

Householder Applications Stevenage
7 Oct 2026 Awaiting decision 26/00737/FPH

14 Petworth Close Stevenage Herts SG2 8UP

Proposed garage conversion, rear and side extension, and alterations to openings to the rear

Householder Applications Stevenage
5 Oct 2026 Awaiting decision 26/00734/FPH

131 Broadwater Crescent Stevenage Herts SG2 8EP

Erection of single storey front extension

Householder Applications Stevenage
2 Oct 2026 Awaiting decision 26/00731/FPH

23 Lingfield Road Stevenage Herts SG1 5SG

Erection of a single-storey rear extension

Householder Applications Stevenage
1 Oct 2026 Awaiting decision 26/00727/FPH

407 Vardon Road Stevenage Herts SG1 5BA

Erection of single storey rear extension and part garage conversion

Householder Applications Stevenage
1 Oct 2026 Awaiting decision 26/00720/FPH

7 St. Andrews Drive Stevenage Herts SG1 4UY

Conversion of double garage, and erection of single storey side/rear extension to facilitate access from the existing dwelling house.

Householder Applications Stevenage
30 Sept 2026 Awaiting decision 26/00724/FPH

24 Bedwell Crescent Stevenage Herts SG1 1LU

Erection of first floor side and rear extensions

Householder Applications Stevenage
30 Sept 2026 Awaiting decision 26/00723/FPH

1 Park Close Stevenage Herts SG2 8PX

Erection of single storey side and rear extension following demolition of existing single storey side and rear extension.

Householder Applications Stevenage
29 Sept 2026 Awaiting decision 26/00719/FPH

107 Chells Way Stevenage Herts SG2 0LT

Single storey front extension and part two storey, part single storey rear extension

Householder Applications Stevenage
29 Sept 2026 Awaiting decision 26/00718/FPH

79 Chertsey Rise Stevenage Herts SG2 9JH

Erection of a part two storey, part single storey rear extension.

Householder Applications Stevenage
28 Sept 2026 Awaiting decision 26/00712/LB

2 Morley Cottages Chells Lane Stevenage Herts SG2 7AA

Replacement of UVPC Windows and Front Door

App. for Listed Building Consent Stevenage
25 Sept 2026 Awaiting decision 26/00707/HPA

15 Chambers Gate Stevenage Herts SG1 3XE

Single storey rear extension which will extend beyond the rear wall of the original house by 4 m, for which the maximum height will be 3.5 m and the h...

Householder Prior Approval (extended PD) Stevenage
23 Sept 2026 Awaiting decision 26/00701/CLPD

6 Furzedown Stevenage Herts SG2 9EN

Proposed new front porch following demolition of existing porch

Cert. of Lawful PROPOSED development Stevenage
23 Sept 2026 Awaiting decision 26/00700/CLPD

8 Furzedown Stevenage Herts SG2 9EN

Lawful Development Certificate (Proposed) front porch with brick walls, concrete roof tiles and uPVC windows and doors, all to match existing.

Cert. of Lawful PROPOSED development Stevenage
22 Sept 2026 Awaiting decision 26/00697/FPH

21 Lincoln Road Stevenage Herts SG1 4PJ

Two storey front extension

Householder Applications Stevenage
17 Sept 2026 Awaiting decision 26/00685/FP

Alleynes School House 1 High Street Stevenage Herts SG1 3BG

Erection of Heras Boundary Fencing for a temporary period of 1 year

App. for Full Planning Permission Stevenage
16 Sept 2026 Approved 19 Oct 26/00683/HPA

32 Brick Kiln Road Stevenage Herts SG1 2NH

Single storey rear extension which will extend beyond the rear wall of the original house by 6m for which the maximum height will be 3m and the height...

Householder Prior Approval (extended PD) Stevenage
15 Sept 2026 Awaiting decision 26/00679/CLPD

13 Kings Walden Rise Stevenage Herts SG2 0JX

Lawful Development Certificate (Proposed) for conversion of existing garage to craft room and utility facilities.

Cert. of Lawful PROPOSED development Stevenage
15 Sept 2026 Approved 15 Oct 26/00680/FPH

343 Archer Road Stevenage Herts SG1 5HF

Part single, part two storey rear extension and single storey front extension.

Householder Applications Stevenage
15 Sept 2026 Awaiting decision 26/00682/FPH

214 Broadwater Crescent Stevenage Herts SG2 8ER

Construction of garden studio outbuilding.

Householder Applications Stevenage
15 Sept 2026 Approved 5 Oct 26/00681/CLPD

84 Warwick Road Stevenage Herts SG2 0QR

Lawful Development Certificate (Proposed) for detached outbuilding in rear garden

Cert. of Lawful PROPOSED development Stevenage
15 Sept 2026 Approved 14 Oct 26/00677/FPH

40 Frobisher Drive Stevenage Herts SG2 0HJ

Two storey side and front extension and new porch to front elevation

Householder Applications Stevenage
14 Sept 2026 Awaiting decision 26/00669/FPH

19 Fallowfield Stevenage Herts SG2 9PJ

Single storey rear extension

Householder Applications Stevenage
11 Sept 2026 Approved 16 Oct 26/00667/FP

93 High Street Stevenage Herts SG1 3HR

Erection of first-floor rear extension to enlarge the existing office and residential flat, together with external alterations.

App. for Full Planning Permission Stevenage
11 Sept 2026 Awaiting decision 26/00668/FPH

40 Hudson Road Stevenage Herts SG2 0ER

Erection of single storey side and rear extension

Householder Applications Stevenage
10 Sept 2026 Awaiting decision 26/00663/FPH

39 Bedwell Crescent Stevenage Herts SG1 1LU

Erection of single storey rear extension

Householder Applications Stevenage
10 Sept 2026 Awaiting decision 26/00620/FPH

23 Watercress Close Stevenage Herts SG2 9TN

Conversion of existing double garage to annexe, single storey extension.

Householder Applications Stevenage
9 Sept 2026 Awaiting decision 26/00661/FPH

14 Lawrence Avenue Stevenage Herts SG1 3JX

Retention of side and rear pergola

Householder Applications Stevenage
2 Sept 2026 Awaiting decision 26/00641/CLPD

25 Pound Avenue Stevenage Herts SG1 3JB

Loft conversion including 3no. rooflights and rear dormer.

Cert. of Lawful PROPOSED development Stevenage
2 Sept 2026 Awaiting decision 26/00643/ENQA

19 North Road Stevenage Herts SG1 4BD

Grade 2 listed property. Emergency door replacements. Rendering repair at the front of the house

Advanced General Enquiry Stevenage
1 Sept 2026 Refused 13 Oct 26/00636/FPH

11 Rye Close Stevenage Herts SG1 3YN

Single storey rear extension

Householder Applications Stevenage
1 Sept 2026 Approved 23 Oct 26/00637/FPH

133 Broadwater Crescent Stevenage Herts SG2 8EP

Front porch extension

Householder Applications Stevenage
1 Sept 2026 Awaiting decision 26/00640/FPH

71 Sparrow Drive Stevenage Herts SG2 9FB

Construction of rear dormer windows and installation of 1no. rooflight.

Householder Applications Stevenage
1 Sept 2026 Awaiting decision 26/00639/ENQ10

28 Whitney Drive Stevenage Herts SG1 4BH

I wanted to find out if we would require planning permission and any requirements you have before proceeding with a garden room build. The company we ...

Enquiry 10 Day Response Stevenage
28 Aug 2026 Approved 20 Oct 26/00634/FPH

52 Drakes Drive Stevenage Herts SG2 0EZ

Single storey rear extension

Householder Applications Stevenage
26 Aug 2026 Approved 14 Oct 26/00631/CLPD

11 Turner Close Stevenage Herts SG1 4AF

Lawful Development Certificate (Proposed) Single storey rear extension

Cert. of Lawful PROPOSED development Stevenage
25 Aug 2026 Pending 26/00627/ENQ10

48 Whitney Drive Stevenage Herts SG1 4BJ

We have recently purchased and moved into 48 Whitney Drive. The fence along one side of the property is currently positioned a considerable distance f...

Enquiry 10 Day Response Stevenage
24 Aug 2026 Approved 29 Sep 26/00592/FP

3-4 And 7-12 Wedgwood Gate Industrial Estate Wedgwood Way Stevenage Herts SG1 4SU

Removing rear single storey extensions to units 3 and 4. Removal of yard walls to units 3 to 12. Installing new roller shutter doors and double glazed...

App. for Full Planning Permission Stevenage
24 Aug 2026 Approved 19 Oct 26/00621/FPH

41 Haycroft Road Stevenage Herts SG1 3JL

Single-storey rear and side extension.

Householder Applications Stevenage
21 Aug 2026 Approved 16 Oct 26/00625/FPH

6 Shephall Way Stevenage Herts SG2 9QR

Erection of single storey side and rear extension

Householder Applications Stevenage
19 Aug 2026 Approved 23 Sep 26/00616/CLPD

40 Broadview Stevenage Herts SG1 3TR

Lawful Development Certificate (Proposed) construction of a detached single storey garden studio/outbuilding within the rear garden of the existing dw...

Cert. of Lawful PROPOSED development Stevenage
18 Aug 2026 Awaiting decision 26/00612/ENQ10

43 Mandeville Stevenage Herts SG2 8JJ

We would like to install a driveway on our front garden, we have spoken to highways and received a quote from them regarding a dropped kerb, but i app...

Enquiry 10 Day Response Stevenage
17 Aug 2026 Approved 6 Oct 26/00600/FPH

8 Turton Place Stevenage Herts SG1 4XE

Conversion of single garage to sensory room

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

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