House extensions in Milton Keynes

Milton Keynes received 710 householder applications in the last 12 months - about 14 a week. Rear extensions and garage works are the most common. Of the 542 decided so far, 464 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 189 applications
21 Oct 2026 Under Consultation PLN/2026/2175

19 Avon Close, Newport Pagnell, MK16 9DH

Single Storey Front Extension & Side Extension

Householder planning permission Milton Keynes
21 Oct 2026 Under Consultation PLN/2026/2173

17 Avon Close, Newport Pagnell, MK16 9DH

Proposed single storey front extension

Householder planning permission Milton Keynes
20 Oct 2026 Valid PLN/2026/1659

Bletchley Park, Sherwood Drive, Bletchley, Milton Keynes, MK3 6EB

Extensions, alterations & revised access to Block B

Full planning permission Milton Keynes
19 Oct 2026 Under Consultation PLN/2026/2148

Al Rawdha, 401 South Row, Central Milton Keynes, Milton Keynes, MK9 2PG

The installation of an external staircase providing a fire escape

Full planning permission Milton Keynes
19 Oct 2026 Under Consultation PLN/2026/2149

16 Wheelers Lane, Bradville, Milton Keynes, MK13 7HW

Certificate of Lawfulness for the proposed loft conversion with rear roof dormer extension, front roof lights with associated internal and external wo...

Lawful development certificate (proposed) Milton Keynes
16 Oct 2026 Under Consultation PLN/2026/2138

Chestnut Lodge, Woburn Road, Little Brickhill, Milton Keynes, MK17 9NA

Proposed Carport (retrospective)

Householder planning permission Milton Keynes
16 Oct 2026 Under Consultation PLN/2026/2108

Oak House, 75a Newport Road, Wavendon, Milton Keynes, MK17 8UJ

Certificate of lawfulness for proposed erection of a detached single storey garden studio, incidental to the main dwelling house

Lawful development certificate (proposed) Milton Keynes
15 Oct 2026 Under Consultation PLN/2026/2067

226 Whalley Drive, Bletchley, Milton Keynes, MK3 6PN

Alterations to the existing property and the erection of a new 3-bed dwelling within the existing curtilage

Full planning permission Milton Keynes
15 Oct 2026 Under Consultation PLN/2026/2137

9 Spring Lane, Olney, MK46 5BN

Proposed new windows and doors, new rear access archway formed in original garage and internal alterations

Householder planning permission Milton Keynes
15 Oct 2026 Under Consultation PLN/2026/2102

4 The Pyghtle, Olney, MK46 5PS

Retention of existing garage conversion (retrospective)

Householder planning permission Milton Keynes
15 Oct 2026 Under Consultation PLN/2026/1984

66 Frensham Drive, Bletchley, Milton Keynes, MK2 3AR

Erection of single storey front and rear extensions

Householder planning permission Milton Keynes
14 Oct 2026 Under Consultation PLN/2026/2130

20 Hoppers Meadow, Loughton, Milton Keynes, MK5 8DR

Erection of a single storey side extension

Householder planning permission Milton Keynes
14 Oct 2026 Under Consultation PLN/2026/1962

Old Beams, Paxton Crescent, Shenley Lodge, Milton Keynes, MK5 7AE

The erection of two gazebos and a picket fence

Full planning permission Milton Keynes
13 Oct 2026 Under Consultation PLN/2026/1937

12 Windsor Street, Wolverton, Milton Keynes, MK12 5AU

Erection of single-storey rear and side infill extension with rooflights, conversion of loft with rear dormer and rooflight on main rear roof slope, r...

Householder planning permission Milton Keynes
13 Oct 2026 Under Consultation PLN/2026/1799

47 Calverton Road, Stony Stratford, Milton Keynes, MK11 1HN

Erection of a single storey rear extension with rooflight

Householder planning permission Milton Keynes
13 Oct 2026 Under Consultation PLN/2026/1798

45 Calverton Road, Stony Stratford, Milton Keynes, MK11 1HN

Erection of a single storey rear extension and demolition of existing outbuilding

Householder planning permission Milton Keynes
13 Oct 2026 Under Consultation PLN/2026/1363

47 Berrenda Avenue, Whitehouse, Milton Keynes, MK8 1DZ

The erection of single storey side and rear extension with roof lights, conversion and rear extension of the detached garage into living accommodation...

Householder planning permission Milton Keynes
13 Oct 2026 Under Consultation PLN/2026/2120

29 Appledore Grove, Brooklands, Milton Keynes, MK10 7EG

Certificate of lawfulness for the proposed loft conversion with roof Lights to front and rear elevations

Lawful development certificate (proposed) Milton Keynes
12 Oct 2026 Under Consultation PLN/2026/2071

33 Blackwood Crescent, Blue Bridge, Milton Keynes, MK13 0LP

Replace conservatory with single storey rear extension with roof light. New rear window to replace doors

Householder planning permission Milton Keynes
12 Oct 2026 Under Consultation PLN/2026/1999

78 Buckingham Road, Bletchley, Milton Keynes, MK3 5HL

Proposed erection of a single-storey side extension, partial replacement of the existing conservatory, and replacement of the conservatory roof with a...

Householder planning permission Milton Keynes
9 Oct 2026 Under Consultation PLN/2026/1764

18 Brill Place, Bradwell Common, Milton Keynes, MK13 8LP

Erection of a side extension between existing dwelling and garage and rear garage extension

Householder planning permission Milton Keynes
8 Oct 2026 Under Consultation PLN/2026/1557

Loughton Sports and Social Club, 2 Linceslade Grove Sportsground, Linceslade Grove, Loughton, Milton Keynes, MK5 8DL

Certificate of lawfulness for the proposed installation of new automatic doors and access ramp

Lawful development certificate (proposed) Milton Keynes
8 Oct 2026 Under Consultation PLN/2026/2101

2 Daylesford Court, Downhead Park, Milton Keynes, MK15 9AY

Proposed single storey rear and side extensions including demolition of existing masonry walls and conservatory

Householder planning permission Milton Keynes
8 Oct 2026 Under Consultation PLN/2026/1729

32 Cleveland, Bradville, Milton Keynes, MK13 7BA

Prior Approval of single storey rear extension, with eaves of 2.48 metres and maximum height of 3.6 metres, extending 6 metres from the original rear ...

Prior approval Milton Keynes
8 Oct 2026 Under Consultation PLN/2026/1992

20 Gun Lane, Sherington, Newport Pagnell, MK16 9PE

Proposed front extension to the existing porch and two-storey rear extension

Householder planning permission Milton Keynes
8 Oct 2026 Under Consultation PLN/2026/1889

26 Thomas Drive, Newport Pagnell, MK16 8TH

Proposed single storey rear extension with the installation of solar panels & a sunpipe and removal of ground floor window on western elevation

Householder planning permission Milton Keynes
7 Oct 2026 Under Consultation PLN/2026/2091

12 Redland Drive, Loughton, Milton Keynes, MK5 8EL

Erection of 2 storey front and side extension to main dwelling attaching to existing detached double garage, including balcony with glass balustrade t...

Householder planning permission Milton Keynes
7 Oct 2026 Under Consultation PLN/2026/1503

10 The Laurels, Bletchley, Milton Keynes, MK1 1BL

Construction of rear basement extension to create additional habitable area, and alteration of roof layout and addition of rooflights to approved side...

Householder planning permission Milton Keynes
7 Oct 2026 Under Consultation PLN/2026/1931

79 Teasel Avenue, Conniburrow, Milton Keynes, MK14 7DR

Proposed change of use from C3 dwelling to 7 bedroom HMO with two storey front and single storey rear extension

Full planning permission Milton Keynes
7 Oct 2026 Under Consultation PLN/2026/1849

8 Shirley Moor, Kents Hill, Milton Keynes, MK7 6DZ

Proposed first floor extension over the existing garage, single storey side extensions (Ground Floor) to the extended Kitchen and loft conversion

Householder planning permission Milton Keynes
6 Oct 2026 Under Consultation PLN/2026/1978

24 Church End Road, Shenley Brook End, Milton Keynes, MK5 7AB

Erection of first floor front extension above existing structure, relocation of front door, alterations to existing windows and new window to front el...

Householder planning permission Milton Keynes
6 Oct 2026 Under Consultation PLN/2026/2032

9 Badgers Oak, Kents Hill, Milton Keynes, MK7 6HS

Construction of an outbuilding in the rear garden

Householder planning permission Milton Keynes
6 Oct 2026 Under Consultation PLN/2026/1934

1 Holmewood, Furzton, Milton Keynes, MK4 1AR

Proposed single storey rear extensions and extension and conversion of garage

Householder planning permission Milton Keynes
6 Oct 2026 Under Consultation PLN/2026/1932

66 The Glebe, Lavendon, Olney, MK46 4HG

Erection of a two storey rear extension, single storey side and rear extension with removal of existing conservatory, alterations to windows and new f...

Householder planning permission Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/2070

2 Tynemouth Rise, Monkston, Milton Keynes, MK10 9JB

Erection of a front porch extension and a rear single storey extension.

Householder planning permission Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/2064

1 Stanbridge Court, Stony Stratford, Milton Keynes, MK11 1NX

Certificate of lawfulness for the proposed conversion of existing garage into a gym, shower room and utility room

Lawful development Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/1731

D F S Ltd Cairngorm Gate Winterhill Milton Keynes MK6 1AZ

Installation of a new mezzanine floor and minor external alterations

Full planning permission Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/2060

8 Coriander Court, Walnut Tree, Milton Keynes, MK7 7BJ

Proposed erection of a single storey side/rear extension

Householder planning permission Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/1926

10 Sandwell Court, Two Mile Ash, Milton Keynes, MK8 8AQ

Proposed single storey side extension & single storey rear conservatory/garden room

Householder planning permission Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/1625

24 London Road, Stony Stratford, Milton Keynes, MK11 1JL

Certificate of lawfulness for the proposed replacement of damaged first-floor rear window and frame

Lawful development Milton Keynes
5 Oct 2026 Under Consultation PLN/2026/0960

17-22, Juniper Gardens, Walnut Tree, Milton Keynes , MK7 7LZ

Replacement windows to all elevations and floors

Full planning permission Milton Keynes
2 Oct 2026 Under Consultation PLN/2026/2052

Juniper House, 110 Watling Street, Little Brickhill, Milton Keynes, MK17 9NB

Proposed construction of detached car port

Householder planning permission Milton Keynes
2 Oct 2026 Under Consultation PLN/2026/1955

7 Aylesbury Street, Wolverton, Milton Keynes, MK12 5HY

Replacement of 3x aluminium casement windows with white, woodgrain, double glazed, uPVC, vertical sliding sash windows and replacement of front timber...

Householder planning permission Milton Keynes
2 Oct 2026 Under Consultation PLN/2026/1927

72 Stratford Road, Wolverton, Milton Keynes, MK12 5LT

Conversion of loft with dormer and rooflight to rear

Householder planning permission Milton Keynes
2 Oct 2026 Under Consultation PLN/2026/1762

58 Passmore, Tinkers Bridge, Milton Keynes, MK6 3DZ

Creation of a self-contained studio flat within the existing ground floor of the main dwelling and alterations to windows

Full planning permission Milton Keynes
2 Oct 2026 Under Consultation PLN/2026/1830

1 Hardwick Road, Woburn Sands, Milton Keynes, MK17 8QH

Proposed two storey side extensions and single storey rear extension

Householder planning permission Milton Keynes
30 Sept 2026 Under Consultation PLN/2026/2037

3 Holst Crescent, Browns Wood, Milton Keynes, MK7 8DQ

Certificate of lawfulness for proposed loft conversion with rear dormer extension and rooflights to front elevation

Lawful development Milton Keynes
30 Sept 2026 Under Consultation PLN/2026/1976

Midsummer Moon, 2a Cross End, Wavendon, Milton Keynes, MK17 8AQ

The erection of a single storey enclosure over the existing swimming pool and link extension from main dwelling

Householder planning permission Milton Keynes
29 Sept 2026 Under Consultation PLN/2026/2017

1 Muncaster Grove, Broughton, Milton Keynes, MK10 9WL

Certificate of lawfulness for the proposed loft conversion including rear & side dormers and roof light to front

Lawful development Milton Keynes
29 Sept 2026 Under Consultation PLN/2026/1796

The Dovecote, Church Street, Olney, MK46 4AD

Demolition of existing link building in corner for replacement with new link, door and window structural opening adjustments and replacement of all wi...

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

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