House extensions in Portsmouth

Portsmouth received 65 householder applications in the last 12 months. Rear extensions and side extensions are the most common. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

65 last 90 days
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27 last 30 days
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Showing 50 of 65 applications
26/00786/HOU 8 Jul 2026 Awaiting decision

42 Manners Road Southsea PO4 0BB

Construction of two storey rear extension (following demolition of existing conservatory)

Portsmouth 8 Jul 2026
26/00026/GPDC 7 Jul 2026 Awaiting decision

111 Kensington Road Portsmouth PO2 0JP

Construction of single storey rear extension, extending 8m beyond the rear wall, with a height of 3m to the eaves and maximum height of 3m

Portsmouth 7 Jul 2026
26/00774/HOU 6 Jul 2026 Awaiting decision

18 Carbis Close Portsmouth PO6 4TW

Internal alterations including partial conversion of car port to form additional living space

Portsmouth 6 Jul 2026
26/00767/HOU 3 Jul 2026 Awaiting decision

34 Woodfield Avenue Portsmouth PO6 1AP

Construction of dormer window to front roofslope

Householder Planning Application Portsmouth 3 Jul 2026
26/00762/HOU 3 Jul 2026 Awaiting decision

23 Carmarthen Avenue Portsmouth PO6 2AG

Construction of single storey rear extension with raised verandah (following removal of existing)

Householder Planning Application Portsmouth 3 Jul 2026
26/00755/HOU 1 Jul 2026 Awaiting decision

71 Grant Road Portsmouth PO6 1DU

Construction of single storey rear and side extension (following removal of existing)

Householder Planning Application Portsmouth 1 Jul 2026
26/00024/GPDC 1 Jul 2026 Awaiting decision

21 Toronto Road Portsmouth PO2 7QB

Construction of single storey rear extension, extending 5.4m beyond the rear wall, with a height of 3m to the eaves and maximum height of 4m

Portsmouth 1 Jul 2026
26/00747/HOU 30 Jun 2026 Awaiting decision

200 Southampton Road Portsmouth PO6 4RZ

Construction of single storey outbuilding with mansard roof

Portsmouth 30 Jun 2026
26/00740/HOU 29 Jun 2026 Awaiting decision

93 Hawthorn Crescent Portsmouth PO6 2TJ

Alterations to roof to include hip to gable buildup and construction of dormer window to rear roofslope

Householder Planning Application Portsmouth 29 Jun 2026
26/00746/FUL 29 Jun 2026 Awaiting decision

Blocks 1 & 2 Bill Sargent Crescent Portsmouth PO1 4JP

Replacement windows to block 1 & 2 Bill Sargent Crescent.

Full Application Portsmouth 29 Jun 2026
26/00745/FUL 29 Jun 2026 Awaiting decision

Cathedral House 63 - 68 St Thomas's Street Portsmouth PO1 2EZ

Retrospective application for replacement PVCu windows to front, rear and side elevations

Portsmouth 29 Jun 2026
26/00736/FUL 26 Jun 2026 Awaiting decision

Solent Infant School Evelegh Road Portsmouth PO6 1DH

Replacement of existing timber shingles to all pitched roofs with Steel roof tiles

Full Application Portsmouth 26 Jun 2026
26/00737/FUL 26 Jun 2026 Awaiting decision

475 - 545 Hawthorn Crescent Portsmouth

Alterations including fascade remediation works, replacement cladding, cladding panels and balcony handrails and replacement plastic brise soleil pane...

Full Application Portsmouth 26 Jun 2026
26/00023/GPDC 24 Jun 2026 Awaiting decision

49 Salterns Avenue Southsea PO4 8QJ

Construction of single storey rear extension, extending 4m beyond the rear wall, with a height of 2.47m to the eaves and maximum height of 3.58m

General Permitted Development Portsmouth 24 Jun 2026
26/00728/FUL 24 Jun 2026 Awaiting decision

Daring Building Victoria Road HM Naval Base Portsmouth PO1 3LJ

Construction of single storey front and side extensions to create additional wc facilities.

Full Application Portsmouth 24 Jun 2026
26/00724/FUL 24 Jun 2026 Awaiting decision

261 Southampton Road Portsmouth PO6 4PZ

Construction of two storey side extension with gable end roof and undercroft access to create additional dwelling.

Full Application Portsmouth 24 Jun 2026
26/00722/HOU 23 Jun 2026 Awaiting decision

10 Court Close Portsmouth PO6 2LU

Construction of single storey rear and side extension (following removal of existing)

Householder Planning Application Portsmouth 23 Jun 2026
26/00022/GPDC 23 Jun 2026 Awaiting decision

43 Martin Road Portsmouth PO3 6JZ

Construction of single storey rear extension, extending 3.7m beyond the rear wall, with a height of 3m to the eaves and maximum height of 3m

General Permitted Development Portsmouth 23 Jun 2026
26/00709/FUL 17 Jun 2026 Awaiting decision

Portsmouth Marriott Hotel Southampton Road Portsmouth PO6 4SH

Alterations to all elevations of the hotel's 8-storey accommodation block including removal of the existing aluminium rain screen folded cassette clad...

Full Application Portsmouth 17 Jun 2026
26/00710/HOU 17 Jun 2026 Awaiting decision

21 Third Avenue Portsmouth PO6 3JA

Construction of single storey rear and side extension (following removal of existing conservatory)

Householder Planning Application Portsmouth 17 Jun 2026
26/00711/FUL 17 Jun 2026 Awaiting decision

83A Campbell Road Southsea PO5 1RJ

Replacement windows to south and east elevations

Full Application Portsmouth 17 Jun 2026
26/00707/FUL 17 Jun 2026 Awaiting decision

Cedar Court 47 Outram Road Southsea

Replacement rear communal area walkway balustrading at ground, first, second and third floor levels

Full Application Portsmouth 17 Jun 2026
26/00701/LBC 16 Jun 2026 Awaiting decision

53 Kent Road Southsea PO5 3HU

Removal of internal modern partition walls, replacement of external timber door and alterations to fenestration

Listed Building Consent Portsmouth 16 Jun 2026
26/00708/HOU 15 Jun 2026 Awaiting decision

10 Fernhurst Road Southsea PO4 8AA

Construction of single storey rear extension

Householder Planning Application Portsmouth 15 Jun 2026
26/00697/CPL 15 Jun 2026 Awaiting decision

12 Shetland Close Portsmouth PO6 3UQ

Application for a Lawful Development Certificate for the proposed construction of single-storey rear extension (following removal of existing conserva...

Certificate of Proposed Lawful Use/Dev Portsmouth 15 Jun 2026
26/00691/HOU 11 Jun 2026 Awaiting decision

41 Drayton Lane Portsmouth PO6 1HG

Construction of two storey front extension with dual pitched roof (following removal of existing), single storey front extension including canopy porc...

Householder Planning Application Portsmouth 11 Jun 2026
26/00686/VOC 8 Jun 2026 Awaiting decision

152 - 154 London Road Portsmouth PO2 9DJ

Application to vary condition 2 (Approved Drawings) of planning permission 22/01667/FUL to allow regularisation of built development and internal alte...

Variation/Removal of Condition Portsmouth 8 Jun 2026
26/00684/HOU 8 Jun 2026 Awaiting decision

87 Festing Grove Southsea PO4 9QE

Construction of single storey rear extension after removal of existing conservatory

Householder Planning Application Portsmouth 8 Jun 2026
26/00683/HOU 5 Jun 2026 Awaiting decision

65 Elkstone Road Portsmouth PO6 4AX

Retrospective application for the construction of outbuilding in rear garden and Proposed construction of front porch (following removal of existing)

Householder Planning Application Portsmouth 5 Jun 2026
26/00679/FUL 4 Jun 2026 Awaiting decision

38 Clarence Parade Southsea PO5 2ET

Change of use from C1 (Hotel) to a 18-bed/24-person House in Multiple Occupation (Sui Generis) with single storey rear extension

Full Application Portsmouth 4 Jun 2026
26/00665/LBC 3 Jun 2026 Awaiting decision

Section Of Perimeter Wall To West Of Nelson Gate Hms Nelson Queen Street Portsmouth PO1 3HH

Alterations to boundary wall including renewal of barbed wire and installation of rotor spikes and lighting.

Listed Building Consent Portsmouth 3 Jun 2026
26/00664/FUL 3 Jun 2026 Awaiting decision

Section Of Perimeter Wall To West Of Nelson Gate Hms Nelson Queen Street Portsmouth PO1 3HH

Alterations to boundary wall including renewal of barbed wire and installation of rotor spikes and lighting

Full Application Portsmouth 3 Jun 2026
26/00666/FUL 3 Jun 2026 Awaiting decision

49 & 51 Raymond Road Portsmouth PO6 4RB

Construction of single storey front extensions to 2no. existing dwellinghouses

Full Application Portsmouth 3 Jun 2026
26/00674/HOU 3 Jun 2026 Awaiting decision

113 Henderson Road Southsea PO4 9JE

Construction of two-storey rear extension

Householder Planning Application Portsmouth 3 Jun 2026
26/00662/HOU 2 Jun 2026 Awaiting decision

47 Whitwell Road Southsea PO4 0QP

Alterations to existing boundary wall fronting the highway to facilitate new dropped kerb and creation of off street parking space

Householder Planning Application Portsmouth 2 Jun 2026
26/00021/GPDC 2 Jun 2026 Awaiting decision

71 St Pirans Avenue Portsmouth PO3 6JE

Construction of single storey rear extension, extending 6m beyond the rear wall, with a height of 3m to the eaves and maximum height of 3m

General Permitted Development Portsmouth 2 Jun 2026
26/00654/HOU 1 Jun 2026 Awaiting decision

47 Ebery Grove Portsmouth PO3 6HG

Construction of garage (following removal of existing)

Householder Planning Application Portsmouth 1 Jun 2026
26/00656/HOU 1 Jun 2026 Awaiting decision

7 Woodfield Avenue Portsmouth PO6 1AN

Alterations to roof to include hip to gable buildup, construction of dormer to rear roofslope, first floor side extension and installation of solar pa...

Householder Planning Application Portsmouth 1 Jun 2026
26/00652/HOU 29 May 2026 Awaiting decision

35 Central Road Portsmouth PO6 1QT

Construction of single storey side extension with pitched roof

Householder Planning Application Portsmouth 29 May 2026
26/00658/HOU 29 May 2026 Awaiting decision

66 Lonsdale Avenue Portsmouth PO6 2PX

Construction of single storey rear and part side extension with roof lantern (following removal of existing conservatory)

Householder Planning Application Portsmouth 29 May 2026
26/00645/FUL 28 May 2026 Awaiting decision

30 & 32 Manners Road Southsea PO4 0BB

Construction of single storey infill extension at no. 30 and single storey rear and side extension to no. 32 (following removal of existing conservato...

Full Application Portsmouth 28 May 2026
26/00644/FUL 28 May 2026 Awaiting decision

Flats 5-16, 20-25, 29-40, 46-57, 61-78 And 82-93 Parsons Close Portsmouth Hilsea PO3 5LN

Replacement stair canopies to 7 flat blocks

Full Application Portsmouth 28 May 2026
26/00635/HOU 26 May 2026 Decided

The Ridgeway 66 London Road Portsmouth PO6 3ET

Alterations to roof to include hip to gable buildup and dormer window to rear roofslope, construction of single storey rear extension with roof lanter...

Householder Planning Application Portsmouth 26 May 2026
26/00634/FUL 26 May 2026 Awaiting decision

161 - 165 Highland Road Southsea PO4 9EY

Construction of rear extensions at first floor level, alterations to front and side elevations and fenestration and creation of front courtyards

Full Application Portsmouth 26 May 2026
26/00632/HOU 25 May 2026 Awaiting decision

141 Stanley Avenue Portsmouth PO3 6PW

Construction of single storey rear extension with roof lantern

Householder Planning Application Portsmouth 25 May 2026
26/00019/GPDC 22 May 2026 Awaiting decision

29 Allcot Road Portsmouth PO3 5DE

Construction of single storey rear extension, extending 4.3m beyond the rear wall, with a height of 2.5m to the eaves and maximum height of 3.8m

General Permitted Development Portsmouth 22 May 2026
26/00631/FUL 22 May 2026 Awaiting decision

22 Granada Road Southsea

Conversion of rear part of lower ground floor to form 1no. 1-bed flat including rear infill extension with associated works.

Full Application Portsmouth 22 May 2026
26/00628/CPL 22 May 2026 Awaiting decision

Keyes Court Albert Road Southsea

Application for Certificate of Lawful Development for proposed alterations to improve fire safety

Certificate of Proposed Lawful Use/Dev Portsmouth 22 May 2026
26/00621/NMA 20 May 2026 Unknown

116 Festing Grove Southsea PO4 9QF

Application for non-material amendment to planning permission 25/00321/HOU to seek approval of amended plans relating to reduction of extension from 6...

Non-Material Amendment Portsmouth 20 May 2026
26/00609/HOU 18 May 2026 Awaiting decision

17 Woodfield Avenue Portsmouth PO6 1AN

Construction of single storey rear extension and patio (following removal of existing conservatory)

Householder Planning Application Portsmouth 18 May 2026
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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 — taller, larger, 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 with objections) can take longer.
Can I get email alerts for new extensions applications in Portsmouth?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Portsmouth. You can also narrow the alert to a postcode, street, or drawn area.

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