House extensions in Dartford

Dartford received 379 householder applications in the last 12 months - about 7 a week. Rear extensions and dormers are the most common. Of the 237 decided so far, 178 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 136 applications
8 Sept 2026 Awaiting decision 26/01026/FUL

Land Rear Of Barton Road Sutton At Hone Kent

Conversion and extension of existing stable block into detached 3 bedroom bungalow and change of use of paddocks to residential curtilage

Full Application Dartford
7 Sept 2026 Awaiting decision 26/00929/FUL

3 Church Path Stone Greenhithe Kent DA9 9JR

Roof alterations and erection of pitched dormers to the front to form a two-storey dwelling, including a front gable entrance extension, extensions to...

Full Application Dartford
7 Sept 2026 Awaiting decision 26/01039/PDE

65 Valley View Greenhithe Kent DA9 9LU

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
7 Sept 2026 Awaiting decision 26/00901/FUL

53 Priory Close Dartford Kent DA1 2JF

Erection of a single storey rear extension

Full Application Dartford
4 Sept 2026 Awaiting decision 26/01035/PDE

63 Valley View Greenhithe Kent DA9 9LU

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
3 Sept 2026 Awaiting decision 26/00979/VCON

23 Brackendene Wilmington Kent DA2 7NB

Erection of a single storey rear extension, conversion of existing integral garage to habitable space, replacement and relocation of detached garage, ...

Variation of Condition Dartford
3 Sept 2026 Awaiting decision 26/01020/FUL

233 High Road Wilmington Kent DA2 7BU

Erection of a single-storey rear extension

Full Application Dartford
1 Sept 2026 Awaiting decision 26/01016/FUL

118 The Brent Dartford Kent DA2 6DE

Erection of a single-storey front extension to existing store

Full Application Dartford
1 Sept 2026 Awaiting decision 26/01015/FUL

5 Foxwood Road Bean Kent DA2 8BH

Erection of a first floor side extension, single storey rear extension and enlarged porch. Change of materials to the roof and walls

Full Application Dartford
1 Sept 2026 Awaiting decision 26/01001/FUL

1 Milestone Road Dartford Kent DA2 6DW

Erection of single-storey front extension and part two/part single storey rear/side extension

Full Application Dartford
1 Sept 2026 Awaiting decision 26/00998/FUL

10 Royal Road Dartford Kent DA2 7RD

Conversion of existing integral garage to habitable room with associated alterations to front elevation

Full Application Dartford
27 Aug 2026 Awaiting decision 26/00938/FUL

27 Powder Mill Lane Wilmington Kent DA1 1NT

Alterations to roof pitch on the first floor rear projection and walls raised to match the new roof and addition of a new window

Full Application Dartford
27 Aug 2026 Awaiting decision 26/00999/FUL

42 Wilmington Court Road Wilmington Kent DA2 7AT

Erection of a first floor side extension, together with alteration of existing flat roof areas over porch and bay window with pitched roof

Full Application Dartford
26 Aug 2026 Awaiting decision 26/01007/PDE

4 Pilgrims Way Dartford Kent DA1 1QA

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
26 Aug 2026 Awaiting decision 26/00977/FUL

16 Spurrell Avenue Bexley Kent DA5 2HA

Conversion of existing garage into habitable room with alterations to garage roof and fenestration changes

Full Application Dartford
26 Aug 2026 Awaiting decision 26/00996/FUL

2 Darenth Park Avenue Darenth Kent DA2 6JN

Erection of a single storey rear extension

Full Application Dartford
26 Aug 2026 Awaiting decision 26/01002/LDC

41 Vale Road Dartford Kent DA1 2TU

Application for a Lawful Development Certificate for proposed erection of a single storey front porch extension and garage conversion to habitable roo...

Lawful Development Certificate Dartford
26 Aug 2026 Awaiting decision 26/00995/FUL

85 Chestnut Grove Wilmington Kent DA2 7PQ

Erection of single storey side and rear wrap around extensions

Full Application Dartford
24 Aug 2026 Awaiting decision 26/00928/FUL

6 Cadogan Avenue Dartford Kent DA2 6ES

Erection of a part two/part single storey rear extension

Full Application Dartford
21 Aug 2026 Awaiting decision 26/00986/LDC

St Fiacre Green Street Green Road Darenth Kent DA2 7HT

Application for a Lawful Development Certificate for proposed height reduction of the existing boundary wall to sit at a maximum height of 2 metres

Lawful Development Certificate Dartford
21 Aug 2026 Awaiting decision 26/00978/LDC

11 Wyvern Close Dartford Kent DA1 2NA

Application for a Lawful Development Certificate for proposed garage conversion to habitable accommodation with associated alterations to rear window ...

Lawful Development Certificate Dartford
21 Aug 2026 Awaiting decision 26/00984/FUL

63A Darenth Road Dartford Kent DA1 1LU

Loft conversion into habitable space incorporating rear dormer and front roof light

Full Application Dartford
20 Aug 2026 Awaiting decision 26/00945/FUL

23 High Street Swanscombe Kent DA10 0AG

Proposed roof extension, side dormer and roof lights to incorporate additional dental surgery over existing parking area, supported by columns

Full Application Dartford
20 Aug 2026 Awaiting decision 26/00962/FUL

77 & 77A Main Road Sutton At Hone Kent DA4 9HQ

Retention of ground floor retail shop. Erection of a part single and part two storey side extension, rear dormer and front roof lights, to create a lo...

Full Application Dartford
20 Aug 2026 Awaiting decision 26/00968/FUL

35 Carrington Road Dartford Kent DA1 1XN

Erection of a single storey rear extension

Full Application Dartford
19 Aug 2026 Awaiting decision 26/00971/PDE

81 Wentworth Drive Dartford Kent DA1 3NQ

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
19 Aug 2026 Awaiting decision 26/00967/PDE

35 Highfield Road Dartford Kent DA1 2JS

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
18 Aug 2026 Awaiting decision 26/00924/FUL

6 Rambler Lane Dartford Kent DA1 5RB

Demolition of existing shed and erection of a single storey side extension and fenestration alterations

Full Application Dartford
18 Aug 2026 Awaiting decision 26/00965/LDC

Foxlea House Puddledock Lane Wilmington Kent DA2 7QE

Application for a Lawful Development Certificate for cross boundary application for proposed erection of a gym and storage outbuilding

Lawful Development Certificate Dartford
18 Aug 2026 Decided 26/00955/FUL

61A Darenth Road Dartford Kent DA1 1LU

Loft conversion into habitable space incorporating rear dormer and front rooflight

Full Application Dartford
17 Aug 2026 Awaiting decision 26/00958/FUL

11 Rectory Road Swanscombe Kent DA10 0JT

Proposed loft conversion comprising rear dormer window and roof lights to front roof slope and erection of a single storey rear extension

Full Application Dartford
17 Aug 2026 Awaiting decision 26/00956/FUL

1 Knole Road Dartford Kent DA1 3JN

Erection of a single storey detached outbuilding for ancillary use

Full Application Dartford
17 Aug 2026 Awaiting decision 26/00944/LDC

59 The Brent Dartford Kent DA1 1YD

Application for a Lawful Development Certificate for proposed loft conversion with a rear dormer and front roof windows, and removal of the chimney

Lawful Development Certificate Dartford
17 Aug 2026 Awaiting decision 26/00954/PDE

108 Brent Lane Dartford Kent DA1 1QX

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
14 Aug 2026 Awaiting decision 26/00750/FUL

15 Kenwood Avenue Longfield Kent DA3 7EX

Conversion of existing garage to form a habitable room with associated alterations to front elevation, rear extension and alterations to roof to provi...

Full Application Dartford
14 Aug 2026 Awaiting decision 26/00947/LDC

59 Farnol Road Dartford Kent DA1 5NG

Application for a Lawful Development Certificate for proposed erection of a single storey rear extension

Lawful Development Certificate Dartford
13 Aug 2026 Awaiting decision 26/00946/FUL

54 Oakfield Lane Dartford Kent DA1 2SY

Provision of a vehicular access and hardstanding including the provision of one off-street parking space

Full Application Dartford
13 Aug 2026 Awaiting decision 26/00941/FUL

161 Main Road Longfield Kent DA3 7PJ

Proposed rear garden level changes

Full Application Dartford
12 Aug 2026 Awaiting decision 26/00859/FUL

217 Hawley Road Dartford Kent DA1 1PU

Erection of a part two/part first floor rear extension and loft conversion, to convert the existing property into 5 no. self contained flats

Full Application Dartford
12 Aug 2026 Awaiting decision 26/00932/FUL

Savigny Darenth Hill Darenth Kent DA2 7QR

Conversion of existing detached garage/outbuilding to form a granny annexe ancillary to the main dwelling, including alterations to existing openings ...

Full Application Dartford
10 Aug 2026 Awaiting decision 26/00926/PDE

6 Hartley Road Longfield Kent DA3 7PE

Determination pursuant to Schedule 2, Part 1 (Class A.1 (g) of the Town and Country Planning (General Permitted Development) (England) Order 2015 as t...

General Permitted Dev - Extensions Dartford
7 Aug 2026 Awaiting decision 26/00728/FUL

10 Swaisland Road Dartford Kent DA1 3DA

Erection of a single storey rear extension

Full Application Dartford
7 Aug 2026 Awaiting decision 26/00915/FUL

Unit 7 Twistleton Court Priory Hill Dartford Kent DA1 2EN

Re-instatement of two windows on the rear elevation.

Full Application Dartford
7 Aug 2026 Awaiting decision 26/00851/FULPSI

Dartford Grammar School For Boys West Hill Dartford Kent DA1 2HW

Erection of a three-storey teaching block adjoining the northern elevation of the existing Becket Sports Centre, together with associated landscaping,...

FUL Public Services Infrastructure Dartford
7 Aug 2026 Awaiting decision 26/00921/FUL

32 Raeburn Avenue Dartford Kent DA1 3BG

Erection of a part two storey/part single storey rear and side extension and first floor side extension and entrance porch and external insulation

Full Application Dartford
7 Aug 2026 Awaiting decision 26/00920/FUL

32 Raeburn Avenue Dartford Kent DA1 3BG

Erection of a part two storey/part single storey rear and side extension and first floor side extension and entrance porch and external insulation

Full Application Dartford
7 Aug 2026 Awaiting decision 26/00830/FUL

13 Heathclose Avenue Dartford Kent DA1 2PH

Demolition of existing conservatory and erection of a single storey rear extension

Full Application Dartford
5 Aug 2026 Awaiting decision 26/00852/FUL

15A Bishops Court Stone Kent DA9 9PX

Replacement of existing bay window

Full Application Dartford
4 Aug 2026 Awaiting decision 26/00907/FUL

36 Ash Road Dartford Kent DA1 2RL

Demolition of existing front porch and erection of a new porch with first floor rear extension to form twin gables and provision of vehicle access

Full Application Dartford
4 Aug 2026 Awaiting decision 26/00903/FUL

18 King Edward Avenue Dartford Kent DA1 2HZ

Demolition of existing rear extension, conservatory & detached garage and erection of a single storey rear and side extension, and associated alterati...

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

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