House extensions in Buckinghamshire

Buckinghamshire received 3,308 householder applications in the last 12 months - about 64 a week. Rear extensions and garage works are the most common. Of the 2,436 decided so far, 2,009 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 817 applications
23 Oct 2026 Registered PL/26/08648/PNE

33 Leachcroft Chalfont St Peter Buckinghamshire SL9 9LD

Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear exte...

Prior Appr Buckinghamshire
23 Oct 2026 Registered PL/26/08605/PNE

7 Hurstfield Drive Burnham Buckinghamshire SL6 0PF

Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey side and ...

Prior Appr Buckinghamshire
23 Oct 2026 Registered PL/26/08305/FA

Oak Meadow Barn Taylors Lane Little Missenden Buckinghamshire HP7 0QZ

Householder application for the construction of a side extension.

Full Application Buckinghamshire
22 Oct 2026 Registered PL/26/08635/PNE

47 Shelburne Road High Wycombe Buckinghamshire HP12 3NQ

Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear exte...

Prior Appr Buckinghamshire
22 Oct 2026 Registered PL/26/08251/FA

35 and 37 Berry Way Newton Longville Buckinghamshire MK17 0AS

Single storey rear extension and garage conversion (35) and new roof over garage (35 and 37)

Full Application Buckinghamshire
22 Oct 2026 Registered PL/26/08160/FA

28 Anstey Close Waddesdon Buckinghamshire HP18 0NB

Householder application for erection of office/gym/playroom outbuilding at bottom of garden (retrospective).

Full Application Buckinghamshire
22 Oct 2026 Registered PL/26/08139/FA

Autumn Rise Duffield Lane Stoke Poges Buckinghamshire SL2 4AH

Householder application for demolition of existing garden sheds and construction of an ancillary outbuilding.

Full Application Buckinghamshire
21 Oct 2026 Registered PL/26/08359/FA

4 Walnut Tree Lane Longwick Buckinghamshire HP27 9SJ

Householder application for a part-ground, part first floor extension.

Full Application Buckinghamshire
21 Oct 2026 Registered PL/26/08338/FA

22 Assheton Road Beaconsfield Buckinghamshire HP9 2NP

Householder application for replacement ground floor rear and side extension following demolition of existing ground floor rear and side extension. Ex...

Full Application Buckinghamshire
21 Oct 2026 Registered PL/26/08351/FA

7 Iver Lodge Bangors Road South Iver Buckinghamshire SL0 0AW

Householder application for the construction of a first floor side extension.

Full Application Buckinghamshire
21 Oct 2026 Registered PL/26/07912/FA

101 Fassetts Road Loudwater Buckinghamshire HP10 9UR

Householder application for the construction of a single-storey detached outbuilding within the front garden for use as a domestic bin store and garde...

Full Application Buckinghamshire
20 Oct 2026 Registered PL/26/08127/SA

4 Creswell Row Marlow Buckinghamshire SL7 2QD

Certificate of Lawfulness for proposed construction of a single-storey side extension

Certificate of Lawful Use - Proposed Buckinghamshire
20 Oct 2026 Registered PL/26/08476/FA

Greencroft The Green Ley Hill Buckinghamshire HP5 3QR

Householder application for a proposed roof canopy/alteration, front porch, garage conversion and internal/external alterations

Full Application Buckinghamshire
20 Oct 2026 Registered PL/26/07691/FA

Land North West Of Crendon Road Chearsley Buckinghamshire

Widen field access and introduce a second field gate matching the existing

Full Application Buckinghamshire
20 Oct 2026 Registered PL/26/08498/PNE

28 Rushmoor Avenue Hazlemere Buckinghamshire HP15 7NP

Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear exte...

Prior Appr Buckinghamshire
19 Oct 2026 Registered PL/26/08059/FA

Tycoed Sandpits Lane Tylers Green Buckinghamshire HP10 8HD

Retrospective change of use of dwellinghouse (class C3) to short-term holiday accommodation (sui generis), retention of garage conversion providing ad...

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/08469/FA

1 Moorhen Close Marsh Gibbon Buckinghamshire OX27 0AH

Householder application for provision of parking space and widen existing pedestrian access to form a vehicular access

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/08456/FA

141 Bedgrove Aylesbury Buckinghamshire HP21 7TR

Householder application for demolition of existing porch, erection of two single storey extensions to existing bungalow. Extension to existing flat ro...

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/08079/FA

Riversdale Lodge Riversdale Bourne End Buckinghamshire SL8 5EB

Householder application for the construction of a first floor infill extension over existing flat roof

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/08450/PNE

Garden House Garden Close Halton Buckinghamshire HP22 5NS

Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear exte...

Prior Appr Buckinghamshire
19 Oct 2026 Registered PL/26/08073/FA

15 and 17 Chapel Lane High Wycombe Buckinghamshire HP12 4BD

Roof alterations to form front and rear gables, side dormers, increase in eaves and ridge height to form habitable space in the loft area. Raising of ...

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/07930/FA

Linden Wood Cokes Lane Little Chalfont Buckinghamshire HP8 4UD

Partial demolition, alterations and extensions to the existing dwelling; subdivision of the plot, erection of a new detached family dwelling, along wi...

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/07871/FA

Former Ambulance Station Chiltern Avenue Amersham Buckinghamshire

Single story rear extension with internal alterations

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/07830/FA

Sycamore Barn Marsh Road Shabbington Buckinghamshire HP18 9HF

Householder application for the conversion of the ground floor of the detached garage to an ancillary home gym and shower room.

Full Application Buckinghamshire
19 Oct 2026 Registered PL/26/06854/FA

1 The Stables Downley Common Downley Buckinghamshire HP13 5YN

Householder application for the erection of a garden room.

Full Application Buckinghamshire
16 Oct 2026 Registered PL/26/08382/FA

7 Church Farm Close Bierton Buckinghamshire HP22 5EL

Householder application for the removal of existing garden wall and shrubs, erection of new fence.

Full Application Buckinghamshire
15 Oct 2026 Registered PL/26/08383/FA

8 Pymcombe Close Princes Risborough Buckinghamshire HP27 9HX

Householder application for single storey side extension, replacement front entrance extension, replacement roof over existing side extension. and 1no...

Full Application Buckinghamshire
15 Oct 2026 Registered PL/26/08326/FA

12 Pimms Grove High Wycombe Buckinghamshire HP13 7EE

Householder application for construction of single storey front, double storey side and part single/double rear extension.

Full Application Buckinghamshire
15 Oct 2026 Registered PL/26/08185/FA

Old Nursery House 53 Lower Road Chalfont St Peter Buckinghamshire SL9 9AP

Householder application for the demolition of existing garden buildings, two storey front extension, single storey rear and side extension, changes to...

Full Application Buckinghamshire
15 Oct 2026 Registered PL/26/07652/FA

Gardeners Cottage Village Road Chenies Buckinghamshire WD3 6EU

Householder application for repair and resurfacing of driveway and path to front door of approximately 87 square metres by breaking out and removal of...

Full Application Buckinghamshire
15 Oct 2026 Registered PL/26/07521/FA

Lady Dell Farm Village Road Chenies Buckinghamshire WD3 6ES

Householder application for creation of swimming pool incidental to dwelling house, pool plant room shed, chicken pen, pergola, arches and associated ...

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/08358/SA

Mandeville Cheapside Lane Denham Buckinghamshire UB9 5AB

Certificate of Lawfulness for proposed single-storey outbuilding to enclose an existing swimming pool and incorporate an incidental home gym and chang...

Certificate of Lawful Use - Proposed Buckinghamshire
14 Oct 2026 Registered PL/26/08363/FA

Oak Croft Oxford Road Gerrards Cross Buckinghamshire SL9 7DJ

Householder application for the construction of a new front door canopy porch.

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/08357/FA

Woodleigh Grange Long Bottom Lane Seer Green Buckinghamshire HP9 2UL

Householder application for the construction of a part single, part two-storey extension with associated remodelling and alterations, and erection of ...

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/08345/FA

Danehurst Bath Road Taplow Buckinghamshire SL6 0AR

Householder application for the construction of a single storey front, side and rear extension, raising of ridge level and amendment to front boundary...

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/08342/FA

Spindlewood 5 Curzon Avenue Beaconsfield Buckinghamshire HP9 2NN

Householder application for the construction of a 4.6m dropped kerb.

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/08106/FA

Chantry Wood House Oxford Road Gerrards Cross Buckinghamshire SL9 7PU

Householder application for the installation of a new front portico

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/08077/FA

41 Pound Lane Marlow Buckinghamshire SL7 2AZ

Householder application for the demolition of rear and side conservatory, to be replaced with single storey extensions. First floor extension over gar...

Full Application Buckinghamshire
14 Oct 2026 Awaiting decision PL/26/07922/FA

54 Wingate Avenue High Wycombe Buckinghamshire HP13 7QS

Householder application for the widening of an existing dropped kerb.

Full Application Buckinghamshire
14 Oct 2026 Registered PL/26/07668/FA

Rookwood 43 Burkes Road Beaconsfield Buckinghamshire HP9 1PW

Householder application for resin bound gravel path with corten steel edging.

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/08320/FA

Farm Land 0ff Dean Road Stewkley Buckinghamshire

Erection of garage for ancillary residential use in association with proposed extension and conversion of adjacent stable building to residential dwel...

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/08315/SA

Elysian Manor Close Hazlemere Buckinghamshire HP10 8HZ

Certificate of Lawfulness for proposed ground floor side extension.

Certificate of Lawful Use - Proposed Buckinghamshire
13 Oct 2026 Registered PL/26/08329/FA

143 Narbeth Drive Aylesbury Buckinghamshire HP20 1PZ

Householder application for the construction of a two storey side extension, with balcony to rear first floor, and a replacement conservatory roof wit...

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/08312/FA

Kincraig Misbourne Avenue Chalfont St Peter Buckinghamshire SL9 0PD

Householder application for the construction of a single storey front/side extension.

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/08311/FA

8 Tylers Hill Road Chesham Buckinghamshire HP5 1XH

Householder application for the construction of a single storey front extension

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/08298/FA

The Dragon House Devonshire Avenue Amersham Buckinghamshire HP6 5JE

Householder application for the demolition of existing glazed conservatory and shed, and erection of two single-storey rear extensions.

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/07940/FA

1 Spa Close Brill Buckinghamshire HP18 9RZ

Householder application for front door alterations

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/07875/SA

70 Great Lane Bierton Buckinghamshire HP22 5BX

Certificate of Lawfulness for proposed removal of existing pavement and installation of drop kerb to front of property with opening approximately 3 me...

Certificate of Lawful Use - Proposed Buckinghamshire
13 Oct 2026 Registered PL/26/08038/FA

155 Bowerdean Road High Wycombe Buckinghamshire HP13 6XP

Householder application for amendments to previously approved front porch / front extension (24/05028/FUL). Retrospective.

Full Application Buckinghamshire
13 Oct 2026 Registered PL/26/07061/FA

40 Eastern Dene Hazlemere Buckinghamshire HP15 7BS

Householder application for demolition of the existing garage and erection of a residential annexe, together with a new vehicular access and dropped k...

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

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