House extensions in Broxbourne

Broxbourne received 306 householder applications in the last 12 months - about 6 a week. Rear extensions and dormers are the most common. Of the 168 decided so far, 152 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 94 applications
2 days ago REGISTERED: Under Assessment 07/26/0694/HF

River House 33 St Catharines Road Broxbourne Hertfordshire EN10 7LD

Erection of rear single storey orangery to replace existing single storey extension

Householder-Full Broxbourne
8 Sept 2026 REGISTERED: Under Assessment 07/26/0693/HF

42 Fairley Way Cheshunt Hertfordshire EN7 6LG

Retrospective erection of 2m boundary fence

Householder-Full Broxbourne
8 Sept 2026 REGISTERED: Under Assessment 07/26/0692/LDP

18 Goffs Crescent Goffs Oak Hertfordshire EN7 5JR

Certificate of lawfulness for proposed loft conversion with rear dormer and 3no. roof lights to front elevation

Lawful Dev. Cert. (Proposed) Broxbourne
7 Sept 2026 REGISTERED: Under Assessment 07/26/0688/LDP

6 Stockwell Lane Cheshunt Hertfordshire EN7 6AT

Certificate of lawfulness for proposed loft conversion with rear L-shaped dormer and 2no. roof lights to front elevation

Lawful Dev. Cert. (Proposed) Broxbourne
7 Sept 2026 REGISTERED: Under Assessment 07/26/0687/PN42

51 Royal Avenue Waltham Cross Hertfordshire EN8 7RB

Prior approval for 4m single storey rear extension

Prior Approval 42 Days Broxbourne
7 Sept 2026 REGISTERED: Under Assessment 07/26/0689/LDP

134 Hammondstreet Road Cheshunt Hertfordshire EN7 6NY

Certificate of lawfulness for proposed placement of caravan in garden for ancillary use

Lawful Dev. Cert. (Proposed) Broxbourne
4 Sept 2026 REGISTERED: Under Assessment 07/26/0684/HF

33 Bell Lane Broxbourne Hertfordshire EN10 7HG

Raising of roof height to accommodate part two storey, part first floor front extension and part two storey, part first floor rear extension, conversi...

Broxbourne
2 Sept 2026 REGISTERED: Under Assessment 07/26/0680/HF

2 Gaywood Avenue Cheshunt Hertfordshire EN8 8QD

Two storey side and part two storey, part single storey rear extension (Resubmission of 07/18/0361/HF)

Broxbourne
1 Sept 2026 REGISTERED: Under Assessment 07/26/0672/LDP

18 Rosehill Close Hoddesdon Hertfordshire EN11 8NH

Certificate of lawfulness for proposed loft conversion with rear dormer and juliet balcony, and 3no. velux windows to front elevation

Broxbourne
1 Sept 2026 REGISTERED: Under Assessment 07/26/0670/LDP

52 Park Lane Waltham Cross Hertfordshire EN8 8BE

Certificate of lawfulness for proposed single storey side and rear extension, front porch extension, loft conversion with rear dormer and 3no. rooflig...

Broxbourne
28 Aug 2026 REGISTERED: Under Consultation 07/26/0668/PN42

108 Dewhurst Road Cheshunt Hertfordshire EN8 9PF

Prior approval for 4m single storey rear extension

Broxbourne
26 Aug 2026 REGISTERED: Under Consultation 07/26/0664/F

Wellington House Trust Road Waltham Cross Hertfordshire EN8 7HF

Erection of refuse store and cycle store

Broxbourne
26 Aug 2026 REGISTERED: Under Consultation 07/26/0667/HF

8 Rochford Close Turnford Hertfordshire EN10 6DA

Single storey side extension, part retrospective amendments to the roof profile of single-storey front extension, and proposed part single-storey, par...

Broxbourne
20 Aug 2026 REGISTERED: Under Assessment 07/26/0657/LDP

3 The Drive Goffs Oak Hertfordshire EN7 5NZ

Certificate of lawfulness for proposed single storey side extension

Broxbourne
19 Aug 2026 REGISTERED: Under Assessment 07/26/0651/LDP

16 Kenning Road Hoddesdon Hertfordshire EN11 9HE

Certificate of lawfulness for proposed loft conversion with rear dormer

Broxbourne
18 Aug 2026 REGISTERED: Under Consultation 07/26/0649/HF

12 Trafalgar Avenue Broxbourne Hertfordshire EN10 7DX

Single storey front, side and rear extension, first floor side and rear extension and alterations to roof on side elevation

Broxbourne
17 Aug 2026 REGISTERED: Under Consultation 07/26/0643/HF

23 Mylne Close Cheshunt Hertfordshire EN8 0PS

Retention of existing 3m timber fence and trellis to rear boundary

Broxbourne
13 Aug 2026 REGISTERED: Under Assessment 07/26/0636/LDP

182 Churchgate Road Cheshunt Hertfordshire EN8 9EL

Certificate of lawfulness for a proposed outbuilding to form home gym, studio and storage to replace existing outbuildings

Broxbourne
13 Aug 2026 REGISTERED: Under Assessment 07/26/0637/LDP

48 Willowdene Cheshunt Hertfordshire EN8 0XD

Certificate of lawfulness for a proposed loft conversion with rear dormer and juliette balcony and 3No. rooflights to front

Broxbourne
13 Aug 2026 REGISTERED: Under Consultation 07/26/0641/HF

17 Westside Turnford Hertfordshire EN10 6DF

Removal of conservatory and external W/C and erection of a single storey rear extension conversion of garage and render to fenestration

Broxbourne
13 Aug 2026 REGISTERED: Under Consultation 07/26/0638/HF

15 Manor Way Cheshunt Hertfordshire EN8 8UL

Single storey ground floor rear extension

Broxbourne
12 Aug 2026 REGISTERED: Under Consultation 07/26/0633/HF

138 Macers Lane Wormley Hertfordshire EN10 6EE

Erection of front porch to replace existing front porch (retrospective)

Broxbourne
11 Aug 2026 REGISTERED: Under Consultation 07/26/0630/HF

48 Willowdene Cheshunt Hertfordshire EN8 0XD

First floor side extension

Broxbourne
10 Aug 2026 REGISTERED: Under Assessment 07/26/0627/HF

7 Cranbourne Drive Hoddesdon Hertfordshire EN11 0QQ

Retrospective single storey rear extension

Broxbourne
10 Aug 2026 REGISTERED: Under Assessment 07/26/0626/LDP

16 Poppy Walk Goffs Oak Hertfordshire EN7 6TJ

Certificate of lawfulness for proposed outbuilding in rear garden

Broxbourne
5 Aug 2026 REGISTERED: Under Assessment 07/26/0613/HF

6 Endeavour Road Cheshunt Hertfordshire EN8 0LN

Part single storey part double storey rear extension

Broxbourne
4 Aug 2026 REGISTERED: Under Assessment 07/26/0612/HF

9 Graham Avenue Broxbourne Hertfordshire EN10 7DN

Single storey side and rear extension following demolition of detached garage

Broxbourne
3 Aug 2026 REGISTERED: Under Assessment 07/26/0609/HF

34 Hammond Close Cheshunt Hertfordshire EN7 6NU

Single storey rear extension and erection of front porch

Broxbourne
3 Aug 2026 REGISTERED: Under Assessment 07/26/0611/HF

32 Bell Lane Broxbourne Hertfordshire EN10 7HE

Erection of front porch

Broxbourne
31 Jul 2026 Decided 07/26/0608/PN42

10 Winford Drive Broxbourne Hertfordshire EN10 6PP

Prior approval for 4.5m single storey rear extension

Broxbourne
29 Jul 2026 REGISTERED: Under Assessment 07/26/0604/HF

28 Mill Lane Cheshunt Hertfordshire EN8 0JH

Retrospective single storey rear extension and attached pergola

Broxbourne
29 Jul 2026 REGISTERED: Under Assessment 07/26/0605/HF

13 Grenadine Close Cheshunt Hertfordshire EN7 6TU

Two storey side extension and loft conversion with rear dormer and 3no. roof lights to front elevation

Broxbourne
28 Jul 2026 REGISTERED: Under Assessment 07/26/0597/HF

72 Glenester Close Hoddesdon Hertfordshire EN11 9PL

Single storey front extension with pitched roof and 3no. velux windows

Broxbourne
28 Jul 2026 REGISTERED: Under Assessment 07/26/0596/LDP

5 Albury Ride Cheshunt Hertfordshire EN8 8XE

Certificate of lawfulness for proposed change from flat roof to pitched roof and alteration to window sizes relating to planning ref. 07/26/0291/LDP

Broxbourne
28 Jul 2026 REGISTERED: Under Assessment 07/26/0601/HF

9 Broxbournebury Mews White Stubbs Lane Broxbourne Hertfordshire EN10 7JA

Single storey rear extension with rooflight to replace existing conservatory and alterations to existing fenestration

Broxbourne
28 Jul 2026 REGISTERED: Under Assessment 07/26/0600/HF

14 Windsor Close Cheshunt Hertfordshire EN7 5LW

Flat roof rear extension in brick to replace existing extension

Broxbourne
28 Jul 2026 REGISTERED: Under Assessment 07/26/0603/HF

14 Trafalgar Avenue Broxbourne Hertfordshire EN10 7DX

Single storey rear extension to replace existing conservatory

Broxbourne
28 Jul 2026 REGISTERED: Under Assessment 07/26/0598/HF

11 Lower Shott Cheshunt Hertfordshire EN7 6DP

Garage conversion into habitable room

Broxbourne
23 Jul 2026 REGISTERED: Under Assessment 07/26/0594/LDP

49 Jacksons Drive Cheshunt Hertfordshire EN7 6HN

Certificate of lawfulness for proposed timber-framed outbuilding in rear garden

Broxbourne
23 Jul 2026 Approved 07/26/0370/LDP

79 Columbia Road Turnford Hertfordshire EN10 6FR

Certificate of lawfulness for proposed loft conversion with rear dormer and 2no. rooflights to front

Broxbourne
21 Jul 2026 REGISTERED: Under Consultation 07/26/0588/HF

132 Bushbarns Cheshunt Hertfordshire EN7 6EF

Single storey flat roof rear extension and single storey side extension

Broxbourne
20 Jul 2026 REGISTERED: Under Assessment 07/26/0585/F

125 Caxton Road Hoddesdon Hertfordshire EN11 9NX

Retrospective single storey rear extension and subdivision of existing house to create a 1 bedroom flat and a 1 bedroom maisonette

Broxbourne
20 Jul 2026 REGISTERED: Under Assessment 07/26/0587/HF

50A Hollybush Way Cheshunt Hertfordshire EN7 6ER

Erection of outbuilding in rear garden

Broxbourne
17 Jul 2026 REGISTERED: Under Assessment 07/26/0584/HF

1 Huxley Close Cheshunt Hertfordshire EN7 6EH

Single storey side infill extension and conversion of garage to habitable room

Broxbourne
17 Jul 2026 REGISTERED: Under Assessment 07/26/0581/LDP

33 Granville Gardens Hoddesdon Hertfordshire EN11 9QB

Certificate of lawfulness for proposed stationing of mobile home in rear garden for use ancillary to the main dwelling

Broxbourne
16 Jul 2026 Approved 07/26/0577/HF

1 Bonney Grove Cheshunt Hertfordshire EN7 5LS

Single storey front, side and rear extension

Broxbourne
16 Jul 2026 REGISTERED: Pending recommendation 07/26/0576/PN42

9 Fairley Way Cheshunt Hertfordshire EN7 6LG

Prior approval for 5.3m single storey rear extension

Broxbourne
15 Jul 2026 REGISTERED: Under Assessment 07/26/0567/HF

9 Whitefields Road Cheshunt Hertfordshire EN8 0EJ

Single storey rear extension

Broxbourne
15 Jul 2026 REGISTERED 07/26/0567/F

9 Whitefields Road Cheshunt Hertfordshire EN8 0EJ

Single storey rear extension

Full Broxbourne
15 Jul 2026 REGISTERED: Under Assessment 07/26/0569/HF

67 Hammondstreet Road Cheshunt Hertfordshire EN7 6PS

Garage conversion to create a self contained unit and extension of existing building to create new garage

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

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