House extensions in Broxbourne

Broxbourne received 418 householder applications in the last 12 months - about 8 a week. Rear extensions and dormers are the most common. Of the 279 decided so far, 251 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 96 applications
Yesterday REGISTERED: Under Assessment 07/26/0829/F

45 Hawthorn Road Hoddesdon Hertfordshire EN11 0PJ

Part retrospective subdivision of extended dwelling to form 1 no. two-bedroom dwelling and 1 no. one-bedroom dwelling, including retention of the two-...

Full Broxbourne
Yesterday REGISTERED: Under Assessment 07/26/0833/F

41 Winterscroft Road Hoddesdon Hertfordshire EN11 8RL

Subdivision of dwellinghouse into 2no. dwellinghouses, removal of existing conservatory and store, part single storey rear extension and erection of f...

Full Broxbourne
Yesterday REGISTERED: Under Assessment 07/26/0831/HF

27 Longfield Lane Cheshunt Hertfordshire EN7 6AB

Erection of car port and first floor side extension

Householder-Full Broxbourne
Yesterday REGISTERED: Under Assessment 07/26/0830/HF

22 Flamstead End Road Cheshunt Hertfordshire EN8 0HT

Single storey side extension

Householder-Full Broxbourne
23 Oct 2026 REGISTERED: Under Assessment 07/26/0824/HF

7 Allwood Road Cheshunt Hertfordshire EN7 6UA

Single storey side and rear extension with flat roof and roof light

Householder-Full Broxbourne
22 Oct 2026 REGISTERED: Under Assessment 07/26/0820/F

72 High Street Hoddesdon Hertfordshire EN11 8ET

Installation of ground floor external toilet

Full Broxbourne
21 Oct 2026 REGISTERED: Under Assessment 07/26/0813/HF

1 Briscoe Road Hoddesdon Hertfordshire EN11 9DQ

Erection of outbuilding in garden for use as office

Householder-Full Broxbourne
20 Oct 2026 REGISTERED: Under Assessment 07/26/0810/HF

56 High Wood Road Hoddesdon Hertfordshire EN11 9AP

Two storey front extension, single storey rear extension and conversion of garage to habitable room

Householder-Full Broxbourne
16 Oct 2026 REGISTERED: Under Consultation 07/26/0807/F

8 The Laurels Cheshunt Hertfordshire EN7 6NL

Retrospective change of use of amenity land to residential garden, erection of boundary wall and raised hardstanding to the side elevation

Full Broxbourne
16 Oct 2026 REGISTERED: Under Consultation 07/26/0806/HF

25 Herongate Road Cheshunt Hertfordshire EN8 0TU

Single storey front extension and conversion of garage into habitable room

Householder-Full Broxbourne
15 Oct 2026 REGISTERED: Under Assessment 07/26/0802/LDP

2 The Drive Hoddesdon Hertfordshire EN11 9HY

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

Lawful Dev. Cert. (Proposed) Broxbourne
14 Oct 2026 REGISTERED: Under Consultation 07/26/0805/O

54-56 High Street Cheshunt Hertfordshire EN8 0AQ

Outline permission with all matters reserved for a three storey extension, roof alterations and change of use of premises to non-residential education...

Outline Broxbourne
14 Oct 2026 REGISTERED: Under Consultation 07/26/0799/HF

15 Bushby Avenue Broxbourne Hertfordshire EN10 6QE

Single storey side and rear extension

Householder-Full Broxbourne
14 Oct 2026 REGISTERED: Under Consultation 07/26/0796/HF

23 The Oval Broxbourne Hertfordshire EN10 6DQ

Single storey side and front extension including part conversion of garage with pitched roof

Householder-Full Broxbourne
14 Oct 2026 REGISTERED: Under Consultation 07/26/0797/HF

12 New Road Broxbourne Hertfordshire EN10 7LW

Demolition of existing rear conservatory and alterations to the existing rear extension

Householder-Full Broxbourne
14 Oct 2026 REGISTERED: Under Assessment 07/26/0798/LDP

145 Northfield Road Waltham Cross Hertfordshire EN8 7RE

Certificate of lawfulness for proposed hip to gable loft conversion with rear dormer, 2no juliet balconies and 3no. roof lights to front elevation

Lawful Dev. Cert. (Proposed) Broxbourne
13 Oct 2026 REGISTERED: Under Assessment 07/26/0794/LDP

38 The Drive Goffs Oak Hertfordshire EN7 5PA

Certificate of lawfulness for proposed outbuilding in rear garden to replace existing shed

Lawful Dev. Cert. (Proposed) Broxbourne
12 Oct 2026 REGISTERED: Under Consultation 07/26/0787/HF

43 Brookfield Gardens Cheshunt Hertfordshire EN8 0QB

Retrospective enlargement of rear extension and construction of outbuilding to replace shed in rear garden

Householder-Full Broxbourne
12 Oct 2026 REGISTERED: Under Consultation 07/26/0786/HF

40 Nursery Road Hoddesdon Hertfordshire EN11 9LB

Single storey front extension

Householder-Full Broxbourne
12 Oct 2026 REGISTERED: Under Consultation 07/26/0785/HF

8 Edinburgh Crescent Waltham Cross Hertfordshire EN8 7QY

Single storey side extension

Householder-Full Broxbourne
12 Oct 2026 REGISTERED: Under Consultation 07/26/0784/F

13 The Clock House Brewery Road Hoddesdon Hertfordshire EN11 8LA

Single storey veranda over existing front patio dining area, with retractable roof and removable glazed screening for seasonal enclosure

Full Broxbourne
12 Oct 2026 REGISTERED: Under Consultation 07/26/0783/HF

3 Acacia Close Cheshunt Hertfordshire EN7 6QF

Single storey rear extension with alterations to fenestration

Householder-Full Broxbourne
12 Oct 2026 REGISTERED: Under Consultation 07/26/0782/HF

7 High View Farm Crouch Lane Goffs Oak Hertfordshire EN7 6TH

Two storey side extension to replace existing detached garage

Householder-Full Broxbourne
9 Oct 2026 REGISTERED: Under Consultation 07/26/0781/PN42

17 Moreton Close Cheshunt Hertfordshire EN7 6LX

Prior approval for 4.5m single storey rear extension

Prior Approval 42 Days Broxbourne
9 Oct 2026 REGISTERED: Under Consultation 07/26/0779/HF

1 Stafford Drive Broxbourne Hertfordshire EN10 7JT

Hip to gable loft conversion with rear dormer and 2no. dormers to front elevation

Householder-Full Broxbourne
7 Oct 2026 REGISTERED: Under Consultation 07/26/0773/HF

196 Lord Street Hoddesdon Hertfordshire EN11 8NL

Double storey side extension, single storey rear extension, erection of front porch and hip to gable roof

Householder-Full Broxbourne
7 Oct 2026 REGISTERED: Under Assessment 07/26/0770/LDP

2 Tennand Close Cheshunt Hertfordshire EN7 6DJ

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

Lawful Dev. Cert. (Proposed) Broxbourne
7 Oct 2026 REGISTERED: Under Assessment 07/26/0771/LDP

141 Ranworth Avenue Hoddesdon Hertfordshire EN11 9NU

Certificate of lawfulness for proposed single storey rear extension, conversion of garage to habitable room, loft conversion with rear dormer and erec...

Lawful Dev. Cert. (Proposed) Broxbourne
7 Oct 2026 REGISTERED: Under Assessment 07/26/0769/LDP

1 Stafford Drive Broxbourne Hertfordshire EN10 7JT

Certificate of lawfulness for proposed hip to gable loft conversion with rear dormer

Lawful Dev. Cert. (Proposed) Broxbourne
7 Oct 2026 Withdrawn 7 Oct 0790/26

43 Blindmans Lane Cheshunt Hertfordshire EN8 9DW

Prior approval for 5m single storey rear extension

Prior Approval 42 Days Broxbourne
6 Oct 2026 REGISTERED: Under Consultation 07/26/0768/PN42

43 Blindmans Lane Cheshunt Hertfordshire EN8 9DW

Prior approval for 5m single storey rear extension

Prior Approval 42 Days Broxbourne
6 Oct 2026 REGISTERED: Under Consultation 07/26/0763/HF

2 Monks Close Broxbourne Hertfordshire EN10 7JY

Single storey rear extension

Householder-Full Broxbourne
6 Oct 2026 REGISTERED: Under Consultation 07/26/0765/HF

3 Stafford Drive Broxbourne Hertfordshire EN10 7JT

Hip to gable loft conversion with rear dormer and 2no. dormers to front elevation

Householder-Full Broxbourne
6 Oct 2026 REGISTERED: Under Consultation 07/26/0761/PN42

34 Hammond Close Cheshunt Hertfordshire EN7 6NU

Prior approval for 4.96m single storey rear extension

Prior Approval 42 Days Broxbourne
5 Oct 2026 REGISTERED: Under Consultation 07/26/0764/F

Tudor Hall 25 Brewery Road Hoddesdon Hertfordshire EN11 8FP

Third floor extension to add 5no. residential flats

Full Broxbourne
2 Oct 2026 Withdrawn 07/26/0759/HF

179 Stanstead Road Hoddesdon Hertfordshire EN11 0QE

Installation of dropped kerb with part demolition of boundary wall and provision of hardstanding

Householder-Full Broxbourne
2 Oct 2026 REGISTERED: Under Consultation 07/26/0755/HF

5 Ward Close Cheshunt Hertfordshire EN7 6BJ

Front porch infill extension and replacement of timber cladding beneath front window with brickwork to match existing dwelling

Householder-Full Broxbourne
2 Oct 2026 REGISTERED: Under Assessment 07/26/0758/LDP

Silver Birches White Stubbs Lane Broxbourne Hertfordshire EN10 7QA

Certificate of lawfulness for proposed outbuilding in rear garden

Lawful Dev. Cert. (Proposed) Broxbourne
2 Oct 2026 REGISTERED: Under Consultation 07/26/0756/HF

89 Baas Hill Broxbourne Hertfordshire EN10 7EP

Conversion of garage to habitable room with alterations to side and rear fenestration and erection of front porch

Householder-Full Broxbourne
1 Oct 2026 REGISTERED: Under Consultation 07/26/0753/HF

30 Marketmore Gardens Goffs Oak Hertfordshire EN7 5FT

Retrospective outbuilding in rear garden

Householder-Full Broxbourne
1 Oct 2026 REGISTERED: Under Consultation 07/26/0754/HF

5 Ferney Road Cheshunt Hertfordshire EN7 6XQ

Conversion of garage into habitable room with 2no. roof lights and alterations to fenestration

Householder-Full Broxbourne
30 Sept 2026 REGISTERED: Under Assessment 07/26/0750/LDP

2 Priory Close Turnford Hertfordshire EN10 6AB

Certificate of lawfulness for proposed single storey rear extension to replace existing and part conversion of garage to habitable room

Lawful Dev. Cert. (Proposed) Broxbourne
30 Sept 2026 REGISTERED: Under Consultation 07/26/0748/HF

20 Colston Crescent Goffs Oak Hertfordshire EN7 5RS

Enlargement of existing rear dormer

Householder-Full Broxbourne
29 Sept 2026 REGISTERED: Under Consultation 07/26/0747/HF

39 Seaforth Drive Waltham Cross Hertfordshire EN8 8BT

Loft conversion with two rear dormers and 4no. rooflights to front elevation

Householder-Full Broxbourne
29 Sept 2026 REGISTERED: Under Assessment 07/26/0743/LDP

9 The Asters Goffs Oak Hertfordshire EN7 6SD

Certificate of lawfulness for proposed single storey rear extension

Lawful Dev. Cert. (Proposed) Broxbourne
28 Sept 2026 REGISTERED: Under Assessment 07/26/0740/LDP

1 Berkley Avenue Waltham Cross Hertfordshire EN8 8BX

Certificate of lawfulness for proposed outbuilding in rear garden for use as gym

Lawful Dev. Cert. (Proposed) Broxbourne
24 Sept 2026 REGISTERED: Under Consultation 07/26/0737/HF

8 Riverside Path Cheshunt Hertfordshire EN8 9QA

Single storey rear extension and front porch, together with associated alterations to the ground floor, including the replacement of existing windows ...

Householder-Full Broxbourne
23 Sept 2026 REGISTERED: Under Consultation 07/26/0736/HF

Pegasus Baas Hill Broxbourne Hertfordshire EN10 7EP

Erection of garden store

Householder-Full Broxbourne
22 Sept 2026 REGISTERED: Under Consultation 07/26/0733/HF

3 Grangebrook Rags Lane Goffs Oak Hertfordshire EN7 6TD

Extension of existing detached garage to provide an ancillary gym and accessible shower room

Householder-Full Broxbourne
22 Sept 2026 REGISTERED: Under Assessment 07/26/0729/LDP

Unit 1 Haslemere Estate Charlton Mead Lane Hoddesdon Hertfordshire EN11 0DJ

Certificate of lawfulness for proposed extension of existing car park to provide an access and exit facility

Lawful Dev. Cert. (Proposed) 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.