House extensions in Brentwood

Brentwood received 514 householder applications in the last 12 months - about 10 a week. Rear extensions and dormers are the most common. Of the 357 decided so far, 306 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 117 applications
19 Oct 2026 Pending Consideration 26/01019/S192

50 Rayleigh Road Hutton Essex CM13 1BA

Application for a Lawful Development Certificate for a Proposed Use or Development to convert detatched garage into a garden room and gym.

Certificate of Lawfulness (proposed) Brentwood
16 Oct 2026 Pending Consideration 26/01056/S192

5 West Park Hill Brentwood Essex CM14 4NZ

Application for a Lawful Development Certificate for a proposed use or development for: proposed hip to gable, with new rear dormer and front velux wi...

Certificate of Lawfulness (proposed) Brentwood
14 Oct 2026 Pending Consideration 26/01050/HHA

149 Worrin Road Shenfield Essex CM15 8JR

Two storey front extension, single storey ground floor rear extension, new fenestration, forming new dormers and alteration to gates

Householder Application Brentwood
13 Oct 2026 Pending Consideration 26/01055/PN42

5 West Park Hill Brentwood Essex CM14 4NZ

Single storey rear extension. The proposed extension would extend 6m beyond the rear wall of the original dwelling, the maximum height of the proposed...

Prior Notification 42 Days Householder Brentwood
13 Oct 2026 Pending Consideration 26/00966/HHA

8 Princes Way Hutton Essex CM13 2JN

Proposed Single/ Two Storey Side and Rear Extensions. Alterations to fenestration

Householder Application Brentwood
12 Oct 2026 Pending Consideration 26/01166/S191

Amblerise 4 Park Lane Herongate Essex CM13 3PJ

Application for a Lawful Development Certificate for an existing use or development for: first floor rear dormer to accomodate a bathroom.

Certificate of Lawfulness (existing) Brentwood
12 Oct 2026 Pending Consideration 26/01001/HHA

49 Spurgate Hutton Essex CM13 2JT

Re-model bungalow with raised ridge, single storey front infill extension, side and rear extensions, alterations to fenestation and layout drive

Householder Application Brentwood
12 Oct 2026 Pending Consideration 26/00957/HHA

3 Princes Way Hutton Essex CM13 2JN

Demolition of existing single storey side extension. Construction of two storey side extension with front and rear bay windows. New open entrance porc...

Householder Application Brentwood
12 Oct 2026 Pending Consideration 26/00798/HHA

172 Hanging Hill Lane Hutton Essex CM13 2HE

Demolish garage and remodel dwelling with two storey front, side and rear and single storey rear extensions. Apply hard and soft landscaping to front ...

Householder Application Brentwood
8 Oct 2026 Pending Consideration 26/01002/HHA

46 Princes Way Hutton Essex CM13 2JW

Conversion of garage to create a habitable room

Householder Application Brentwood
5 Oct 2026 Pending Consideration 26/01161/PN42

93 Danes Way Pilgrims Hatch Essex CM15 9JT

Single storey rear extension. The proposed extension would extend 4.5m beyond the rear wall of the original dwelling, the maximum height of the propos...

Prior Notification 42 Days Householder Brentwood
5 Oct 2026 Withdrawn 8 Oct 26/01014/S192

Glen Royal Wyatts Green Road Wyatts Green Essex CM15 0PJ

Application for a Lawful Development Certificate for a proposed use or development for: single storey rear extension and the conversion of the existin...

Certificate of Lawfulness (proposed) Brentwood
5 Oct 2026 Pending Consideration 26/00889/S192

28 Mores Lane Pilgrims Hatch South Weald Essex CM14 5RZ

Application for a Lawful Development Certificate for a Proposed Use or Development for a single storey side extension

Certificate of Lawfulness (proposed) Brentwood
5 Oct 2026 Pending Consideration 26/00983/HHA

16 Willowdene Court Warley Essex CM14 5ET

Part two storey part first floor front extension, alterations to fenestration, relocate entrance to frontage, installation of solar panels side roof s...

Householder Application Brentwood
1 Oct 2026 Pending Consideration 26/01122/S192

23 St Andrews Place Shenfield Essex CM15 8HH

Application for a Lawful Development Certificate for a proposed use or development for: demolish rear conservatory and build single storey rear extens...

Certificate of Lawfulness (proposed) Brentwood
1 Oct 2026 Pending Consideration 26/01123/S192

Millcot 2 Mill Green Road Fryerning Essex CM4 0RH

Application for a Lawful Development Certificate for a proposed use or development for: single storey rear extension with a mono pitched roof.

Certificate of Lawfulness (proposed) Brentwood
30 Sept 2026 Pending Consideration 26/00729/S192

Meadow View Murthering Lane Navestock Essex RM4 1HL

Application for a Lawful Development Certificate for a Proposed use of Development Proposed stables and garaging

Certificate of Lawfulness (proposed) Brentwood
30 Sept 2026 Approved 15 Oct 26/01012/S192

96 Woodman Road Warley Essex CM14 5AZ

Application for a Lawful Development Certificate for a proposed use or development for removal of side chimney stacks, extend hip to gable roof add re...

Certificate of Lawfulness (proposed) Brentwood
30 Sept 2026 Pending Consideration 26/00888/HHA

3 Queen Street Warley Essex CM14 5JZ

Constuction of first floor side extension.

Householder Application Brentwood
29 Sept 2026 Pending Consideration 26/01110/S192

7 Junction Road Warley Essex CM14 5JH

Application for a Lawful Development Certificate for a proposed use/development for: single storey side extension (garden room), x 2 removal of existi...

Certificate of Lawfulness (proposed) Brentwood
29 Sept 2026 Pending Consideration 26/01114/HHA

1 Burses Way Hutton Essex CM13 2PL

Construction of a single storey rear extension and raised patio (Retrospective).

Householder Application Brentwood
25 Sept 2026 Pending Consideration 26/01097/S192

60 Warley Hill Warley Essex CM14 5HA

Application for a Lawful Development Certificate for a proposed use or development for: demolish garage, add rear dormer, 2x front roof lights, altera...

Certificate of Lawfulness (proposed) Brentwood
25 Sept 2026 Pending Consideration 26/01098/HHA

60 Warley Hill Warley Essex CM14 5HA

Demolition of existing garage, lean-to and outbuilding. Construction of a single storey rear/side extension

Householder Application Brentwood
25 Sept 2026 Approved 13 Oct 26/00634/S192

10 St Charles Road Brentwood Essex CM14 4TS

Application for a Lawful Development Certificate for a Proposed Use or Development for demolition of existing garage and construction of a single stor...

Certificate of Lawfulness (proposed) Brentwood
23 Sept 2026 Pending Consideration 26/01084/HHA

14 Princes Way Hutton Essex CM13 2JN

Proposed single storey side extension & part single storey rear extension

Householder Application Brentwood
22 Sept 2026 Pending Consideration 26/01081/S192

172 Hanging Hill Lane Hutton Essex CM13 2HE

Application for a Lawful Development Certificate for a proposed use or development for: construction of a new single storey outbuilding

Certificate of Lawfulness (proposed) Brentwood
22 Sept 2026 Pending Consideration 26/00877/HHA

145 Worrin Road Shenfield Essex CM15 8JR

Single storey rear extension, garage conversion, internal alterations, rear patio remodeling

Householder Application Brentwood
22 Sept 2026 Pending Consideration 26/00836/FUL

1 Waterloo Road Brentwood Essex CM14 4XB

Two storey extension and conversion of existing house into 2 no 3 bed flats (part-retrospective).

Full Application Brentwood
21 Sept 2026 Pending Consideration 26/01068/HHA

108 Woodman Road Warley Essex CM14 5AZ

Rear ground floor single storey extension

Householder Application Brentwood
21 Sept 2026 Pending Consideration 26/01065/HHA

7 West Way Brentwood Essex CM14 4PB

Two storey side extension to existing dwelling

Householder Application Brentwood
21 Sept 2026 Pending Decision 26/01066/PN42

7 West Way Brentwood Essex CM14 4PB

Single storey rear extension. The proposed extension would extend 6m beyond the rear wall of the original dwelling, the maximum height of the proposed...

Prior Notification 42 Days Householder Brentwood
18 Sept 2026 Pending Consideration 26/01063/HHA

137 Woodland Avenue Hutton Essex CM13 1HL

Single storey 3m front extension with pitched roof.

Householder Application Brentwood
18 Sept 2026 Pending Consideration 26/01062/S192

137 Woodland Avenue Hutton Essex CM13 1HL

Application for a Lawful Development Certificate for a proposed use or development for: demolition of existing conservatory, single storey rear extens...

Certificate of Lawfulness (proposed) Brentwood
18 Sept 2026 Pending Consideration 26/01058/S192

4 The Gardens Doddinghurst Essex CM15 0LU

Application for a Lawful Development Certificate for a proposed use or development for construction of single storey rear extension and replace existi...

Certificate of Lawfulness (proposed) Brentwood
18 Sept 2026 Pending Consideration 26/00550/LBC

12 Thorndon Hall Thorndon Park Ingrave Essex CM13 3RJ

Internal alterations and refurbishment. Including secondary glazing and new flue outlet and infilling of redundant

Listed Building Consent Brentwood
18 Sept 2026 Pending Consideration 26/00878/HHA

145 Worrin Road Shenfield Essex CM15 8JR

Garage conversion, internal alterations and rear patio remodeling

Householder Application Brentwood
17 Sept 2026 Pending Consideration 26/01051/HHA

Fairmont House 27 Longaford Way Hutton Essex CM13 2LT

First floor extension above existing single-storey element, and single-storey brick store plus bay window. Replacement of existing roof tiles.

Householder Application Brentwood
17 Sept 2026 Pending Consideration 26/01049/S192

Fairbourne The Close Rose Valley Brentwood Essex CM14 4JA

Application for a Lawful Development Certificate for a proposed use or development for: removal of some existing ground floor doors and windows and in...

Certificate of Lawfulness (proposed) Brentwood
17 Sept 2026 Approved 21 Oct 26/01053/PN42

50 Byron Road Hutton Essex CM13 2SA

Single storey rear extension. The proposed extension would extend 5.0m beyond the rear wall of the original dwelling, the maximum height of the propos...

Prior Notification 42 Days Householder Brentwood
16 Sept 2026 Pending Consideration 26/01048/HHA

90 Sebastian Avenue Shenfield Essex CM15 8PP

Remove rear pitched roof, remove hip and form gable. Proposed flat roof dormer and roof windows to front elevation. Proposed crown top rear roof.

Householder Application Brentwood
16 Sept 2026 Pending Consideration 26/01047/HHA

5 Ridgeway Ingatestone Essex CM4 9AS

Proposed single storey rear extension and alterations to fenestration.

Householder Application Brentwood
16 Sept 2026 Pending Consideration 26/00728/HHA

19 St Andrews Place Shenfield Essex CM15 8HH

Single/double front storey extension and remove tile hanging and replace with render. Convert part garage for habitable use and new pitched roof to ga...

Householder Application Brentwood
14 Sept 2026 Approved 22 Oct 26/01024/PN42

Briar Cottage Horseman Side Navestock Essex CM14 5SS

Demolish existing single storey elements and construct Single storey rear extension with flat roof. The proposed extension would extend 8m beyond the ...

Prior Notification 42 Days Householder Brentwood
11 Sept 2026 Pending Consideration 26/01025/S192

Briar Cottage Horseman Side Navestock Essex CM14 5SS

Application for a Lawful Development Certificate for a proposed use or development for: demolish existing single storey elements and add part single p...

Certificate of Lawfulness (proposed) Brentwood
10 Sept 2026 Pending Consideration 26/00855/HHA

41 Friars Avenue Shenfield Essex CM15 8HY

Change roof from hip to gable, rear dormer extension with Juliet balcony, two storey side and rear extension, single storey rear extension and open fr...

Householder Application Brentwood
9 Sept 2026 Pending Consideration 26/01029/S192

Timberlyn Outings Lane Doddinghurst Essex CM15 0LZ

Application for a Lawful Development Certificate for a proposed use or development for construction of a side dormer window, installation of a new roo...

Certificate of Lawfulness (proposed) Brentwood
9 Sept 2026 Pending Consideration 26/00873/HHA

25 Tomlyns Close Hutton Essex CM13 1PU

Demolish porch and shed and construct single storey side and rear extension and relocate main entrance to front of dwelling (Part retrospective)

Householder Application Brentwood
8 Sept 2026 Pending Consideration 26/01021/HHA

118 Hunter Avenue Shenfield Essex CM15 8PG

Single storey rear extension and garden room

Householder Application Brentwood
8 Sept 2026 Pending Consideration 26/00843/HHA

Greenwoods 68 Selwood Road Brentwood Essex CM14 4QA

Demolition of existing single storey garage and construction of a part single and part two storey side and rear extension. The existing house roof is ...

Householder Application Brentwood
3 Sept 2026 Pending Consideration 26/01011/HHA

Harrington House 24 Worrin Road Shenfield Essex CM15 8DE

Add hipped roof to front bay window

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

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