House extensions in Stevenage

Stevenage received 180 householder applications in the last 12 months - about 3 a week. Rear extensions and side extensions are the most common. Of the 120 decided so far, 105 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 65 applications
Yesterday Pending 26/00620/FPH

23 Watercress Close Stevenage Herts SG2 9TN

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

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

25 Pound Avenue Stevenage Herts SG1 3JB

Lawful Development Certificate (Proposed) for loft conversion

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 Pending 26/00636/FPH

11 Rye Close Stevenage Herts SG1 3YN

Single storey rear extension

Householder Applications Stevenage
1 Sept 2026 Pending 26/00637/FPH

133 Broadwater Crescent Stevenage Herts SG2 8EP

Front porch extension

Householder Applications Stevenage
1 Sept 2026 Pending 26/00640/FPH

71 Sparrow Drive Stevenage Herts SG2 9FB

Loft conversion to create a second floor bedroom with en-suite

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 Pending 26/00634/FPH

52 Drakes Drive Stevenage Herts SG2 0EZ

Single storey rear extension

Householder Applications Stevenage
26 Aug 2026 Pending 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 Awaiting decision 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 Awaiting decision 26/00621/FPH

41 Haycroft Road Stevenage Herts SG1 3JL

Single-storey rear and side extension.

Householder Applications Stevenage
21 Aug 2026 Awaiting decision 26/00625/FPH

6 Shephall Way Stevenage Herts SG2 9QR

Erection of single storey side and rear extension

Householder Applications Stevenage
19 Aug 2026 Awaiting decision 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 Awaiting decision 26/00600/FPH

8 Turton Place Stevenage Herts SG1 4XE

Conversion of single garage to sensory room

Householder Applications Stevenage
17 Aug 2026 Awaiting decision 26/00605/FP

Stevenage Leisure Park, Unit 1A Kings Way Stevenage Herts SG1 2UA

Sub division of Unit R1 into 2 Units including new entrance and new side delivery window

App. for Full Planning Permission Stevenage
14 Aug 2026 Awaiting decision 26/00604/FPH

74 Basils Road Stevenage Herts SG1 3PU

Demolition of existing lean and proposed single storey rear extension

Householder Applications Stevenage
14 Aug 2026 Awaiting decision 26/00603/FPH

73 Warwick Road Stevenage Herts SG2 0QR

Proposed Single Storey Rear Extension

Householder Applications Stevenage
11 Aug 2026 Awaiting decision 26/00593/HPA

9 Coopers Close Stevenage Herts SG2 9TL

Single-storey rear extension which will extend beyond the rear wall of the original house by 6.4m, for which the maximum height will be 3.62m and the ...

Householder Prior Approval (extended PD) Stevenage
11 Aug 2026 Approved 26/00594/FPH

18 Fishers Green Stevenage Herts SG1 2JA

Proposal for the erection of an out building at the rear of the property

Householder Applications Stevenage
10 Aug 2026 Awaiting decision 26/00563/FP

13 Buckthorn Avenue Stevenage Herts SG1 1TT

Part single storey, part two storey rear extensions and conversion of existing dwelling to 3 no. flats

App. for Full Planning Permission Stevenage
5 Aug 2026 Pending 26/00584/ENQ10

41 Sish Lane Stevenage Herts SG1 3LS

I want to remove the window and move my existing door to the centre of the existing porch for a more modern look in line with the rest of the street. ...

Enquiry 10 Day Response Stevenage
31 Jul 2026 Awaiting decision 26/00571/CLPD

76 Wheatlands Stevenage Herts SG2 0JU

Lawful Development Certificate (Proposed) garage to be converted to habitable space

Cert. of Lawful PROPOSED development Stevenage
30 Jul 2026 Awaiting decision 26/00569/FPH

82 Telford Avenue Stevenage Herts SG2 0AJ

Proposed dropped kerb and off-street parking

Householder Applications Stevenage
29 Jul 2026 Approved 26/00564/CLEU

1 Sish Close Stevenage Herts SG1 3LT

Lawful Development Certificate (Existing) for a Two storey side and rear extension

Cert. of Lawful EXISTING use Stevenage
29 Jul 2026 Awaiting decision 26/00566/FPH

25 Edmonds Drive Stevenage Herts SG2 9TJ

Erection of single storey side and rear extension

Householder Applications Stevenage
28 Jul 2026 Awaiting decision 26/00477/FPH

39 Fawcett Road Stevenage Herts SG2 0EH

Erection of single storey front extension

Householder Applications Stevenage
28 Jul 2026 Awaiting decision 26/00561/LB

61-63 High Street Stevenage Herts SG1 3AQ

External decorative works and maintenance

App. for Listed Building Consent Stevenage
27 Jul 2026 Approved 26/00558/FPH

119 Webb Rise Stevenage Herts SG1 5QF

Erection of single storey front and rear extension

Householder Applications Stevenage
27 Jul 2026 Awaiting decision 26/00557/ENQ10

20 Milestone Close Stevenage Herts SG2 9RR

Is planning permission required to extend current drive to grass area

Enquiry 10 Day Response Stevenage
27 Jul 2026 Awaiting decision 26/00552/FPH

68 Walkern Road Stevenage Herts SG1 3RB

Erection of single storey side and rear extension with dormer loft conversion

Householder Applications Stevenage
27 Jul 2026 Awaiting decision 26/00555/CLPD

25 Neptune Gate Stevenage Herts SG2 7SH

Lawful Development Certificate (Proposed) for loft conversion

Cert. of Lawful PROPOSED development Stevenage
27 Jul 2026 Approved 26/00553/CLPD

8 Pigeonswick Close Stevenage Herts SG1 2GU

Lawful Development Certificate (Proposed) for single storey rear extension

Cert. of Lawful PROPOSED development Stevenage
24 Jul 2026 Awaiting decision 26/00546/FPH

29 Kilner Close Stevenage Herts SG1 5AZ

Single storey rear extension and single storey side extension

Householder Applications Stevenage
24 Jul 2026 Awaiting decision 26/00550/FPH

37 Woolners Way Stevenage Herts SG1 3AF

Erection of single storey front extension and associated alterations

Householder Applications Stevenage
23 Jul 2026 Withdrawn 26/00537/HPA

39 Bedwell Crescent Stevenage Herts SG1 1LU

Single storey rear extension which will extend beyond the rear wall of the original house by 3.40m, for which the maximum height will be 2.90m and the...

Householder Prior Approval (extended PD) Stevenage
22 Jul 2026 Approved 26/00532/FPH

136 Shephall View Stevenage Herts SG1 1RR

Demolition of existing garage and erection of replacement garage

Householder Applications Stevenage
22 Jul 2026 Approved 26/00531/FPH

134 Shephall View Stevenage Herts SG1 1RR

Two storey front and side extensions; part single, part two storey rear extension; alterations to front elevation; and new vehicular crossover.

Householder Applications Stevenage
21 Jul 2026 Approved 26/00535/FP

62 Eliot Road Stevenage Herts SG2 0LL

Erection of 1no. one bedroom dwelling and porch extension to the existing dwelling

App. for Full Planning Permission Stevenage
16 Jul 2026 Refused 26/00528/FP

93 High Street Stevenage Herts SG1 3HR

Proposed first-floor extension to enlarge the existing office and residential flat, new shop front to front elevation, and fenestration alterations to...

App. for Full Planning Permission Stevenage
16 Jul 2026 Approved 26/00527/CLPD

47 Nodes Drive Stevenage Herts SG2 8AJ

Lawful Development Certificate (Proposed) for detached garden room

Cert. of Lawful PROPOSED development Stevenage
14 Jul 2026 Approved 26/00524/CLPDFT

75 Wheatlands Stevenage Herts SG2 0JU

Lawful Development Certificate (Proposed) construction of loft conversion.

Certificate of Lawfulness PD Fast Track Stevenage
14 Jul 2026 Approved 26/00521/CLPD

166 Pankhurst Crescent Stevenage Herts SG2 0QP

Lawful Development Certificate (Proposed) construction of single storey rear extension and detached single storey outbuilding

Stevenage
13 Jul 2026 Awaiting decision 26/00515/ENQ5

17 Coopers Close Stevenage Herts SG2 9TL

Proposal to install a new side personnel door (inward opening) and side window (fixed) into the western elevation of our detached double garage that d...

Stevenage
9 Jul 2026 Awaiting decision 26/00427/FPM

Lister Hospital Coreys Mill Lane Stevenage Herts SG1 4AB

Erection of extension with rooftop plant for new paediatric ward, and demolition of small modular buildings on site.

Stevenage
9 Jul 2026 Approved 26/00497/CLPD

84 Telford Avenue Stevenage Herts SG2 0AJ

Lawful Development Certificate (Proposed) construction of permeable vehicular driveway

Cert. of Lawful PROPOSED development Stevenage
7 Jul 2026 Awaiting decision 26/00503/ENQ5

21 Fieldfare Stevenage Herts SG2 9NJ

I would like to know if I require planning permission or if it falls under permitted development to convert my garage into a living space with an en-s...

Stevenage
6 Jul 2026 Awaiting decision 26/00499/ENQ10

92 The Paddocks Stevenage Herts SG2 9UB

I would like to confirm whether planning permission is required for the proposed replacement of the existing front sliding glazed entrance doors at my...

Enquiry 10 Day Response Stevenage
6 Jul 2026 Awaiting decision 26/00500/ENQ10

7 The Ridings Stevenage Herts SG2 9UA

I am proposing to construct a single-storey rear extension to my property under Permitted Development rights. The extension will replace a previous le...

Enquiry 10 Day Response 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.