House extensions in Brentwood

Brentwood received 347 householder applications in the last 12 months - about 7 a week. Rear extensions and dormers are the most common. Of the 239 decided so far, 198 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 78 applications
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
1 Sept 2026 Pending Consideration 26/00954/S191

1 Burses Way Hutton Essex CM13 2PL

Application for a Lawful Development Certificate for an existing use or operation or activity including those in breach of a planning condition for Hi...

Certificate of Lawfulness (existing) Brentwood
1 Sept 2026 Pending Consideration 26/00679/S192

Fieldings 21 Rectory Chase Doddinghurst Essex CM15 0QN

Application for a Lawful Development Certificate for a proposed use or development for a disability access prorch.

Certificate of Lawfulness (proposed) Brentwood
25 Aug 2026 Pending Consideration 26/00323/HHA

283 Roman Road Mountnessing Essex CM15 0UH

Proposed storey and a half side extension. Retain a section of side extension in the middle of the house. A single storey 1 bedroom Annex to the rear ...

Householder Application Brentwood
24 Aug 2026 Pending Consideration 26/00850/HHA

48 Clavering Gardens West Horndon Essex CM13 3ND

Part single, part two storey, part first floor side/rear extensions and replace front porch

Householder Application Brentwood
24 Aug 2026 Pending Consideration 26/00567/HHA

Wimborne House Fryerning Lane Ingatestone Essex CM4 0GF

Demolish existing outbuildings and construct detached annexe

Householder Application Brentwood
21 Aug 2026 Pending Consideration 26/00847/PN42

30 Woodman Road Warley Essex CM14 5BE

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
20 Aug 2026 Withdrawn 26/00838/S192

18 Elmtree Avenue Kelvedon Hatch Essex CM15 0BH

Application for a Lawful Development Certificate for a Proposed Use or Development for the conversion of existing double garage into a kitchen, includ...

Certificate of Lawfulness (proposed) Brentwood
18 Aug 2026 Pending Consideration 26/00840/HHA

39 Hogarth Avenue Brentwood Essex CM15 8BE

Re-model bungalow by raising ridge to create house with 2nd floor rear dormer, add part single part two storey rear extensions and conversion of garag...

Householder Application Brentwood
17 Aug 2026 Pending Consideration 26/00928/PN42

225 Brentwood Road Herongate Essex CM13 3PL

Demolition of existing rear conservatory and construction of a single-storey rear orangery extension. The proposed extension would extend 8m beyond th...

Prior Notification 42 Days Householder Brentwood
14 Aug 2026 Pending Consideration 26/00756/HHA

The Plough Sabines Road Navestock Essex RM4 1HD

The change of use of the garaging accommodation approved under the application No: BRW/664/2000, to an annexe incorporating a gym/lounge, WC/Shower an...

Householder Application Brentwood
14 Aug 2026 Pending Consideration 26/00607/S192

5 Rayleigh Road Hutton Essex CM13 1AA

Application for a Lawful Development Certificate for a Proposed Use or Development for the replacement of existing single-glazed windows with new doub...

Certificate of Lawfulness (proposed) Brentwood
14 Aug 2026 Pending Consideration 26/00826/FUL

28 Hutton Drive Hutton Essex CM13 2RQ

Demolition of existing porch, bay window and conservatory. Construction of attached dwelling to side with extended dropped kerb

Full Application Brentwood
12 Aug 2026 Pending Consideration 26/00757/HHA

87 Thorndon Avenue West Horndon Essex CM13 3TS

Single story rear extension infill with change to fenestrations, loft conversion with build up of gable wall and front and rear dormers.

Householder Application Brentwood
11 Aug 2026 Approved 26/00716/S192

Sunnyside 18 Burnthouse Lane Mountnessing Essex CM4 9AN

Application for a Lawful Development Certificate for a Proposed Use or Development for proposed construction of a detached garden room within the rear...

Certificate of Lawfulness (proposed) Brentwood
10 Aug 2026 Decided 26/00828/PN42

9 Church Road Mountnessing Essex CM15 0TH

Demolition of existing rear extention and construct of single storey rear extension. The proposed extension would extend 5.50m beyond the rear wall of...

Prior Notification 42 Days Householder Brentwood
6 Aug 2026 Pending Consideration 26/00561/PN42

22 Margaret Avenue Shenfield Essex CM15 8RF

Proposed rear extension. Extending 4m from the existing extension, providing an extension of a total depth of 7m beyond the rear wall of the original ...

Prior Notification 42 Days Householder Brentwood
5 Aug 2026 Approved 26/00875/S192

Pumping Station Cottage Great Warley Street Great Warley Essex CM13 3JR

Application for a Lawful Development Certificate for a Proposed Use or Development for a side extension plus additional detached building to rear in a...

Certificate of Lawfulness (proposed) Brentwood
4 Aug 2026 Pending Consideration 26/00752/FUL

Ingatestone County Infant School Fryerning Lane Ingatestone Essex CM4 0DF

Installation of new perimeter fencing and associated gates to enhance site security.

Full Application Brentwood
4 Aug 2026 Pending Consideration 26/00785/HHA

Brienda Nine Ashes Road Stondon Massey Essex CM15 0ER

Raise ridge to create first floor accommodation with two storey front extension, front and rear dormers, partial garage conversion and alterations to ...

Householder Application Brentwood
3 Aug 2026 Refused 26/00857/PN42

Brook Cottage Beggar Hill Fryerning Essex CM4 0PL

Single storey rear extension with flat roof. The proposed extension would extend 8m beyond the rear wall of the original dwelling, the maximum height ...

Prior Notification 42 Days Householder Brentwood
31 Jul 2026 Pending Decision 26/00709/LBC

The Woodbines Fingrith Hall Road Blackmore Essex CM4 0RU

Construction of a detached single-storey garden office building.

Listed Building Consent Brentwood
31 Jul 2026 Pending Decision 26/00712/HHA

The Woodbines Fingrith Hall Road Blackmore Essex CM4 0RU

Construction of a detached single-storey garden office building.

Householder Application Brentwood
28 Jul 2026 Pending Consideration 26/00717/FUL

Rosewood House Heronway Hutton Essex CM13 2LX

Construction of a new dwelling with rooms in the roof, and attached triple garage. New entrance crossover. New entrance piers and gates to both entran...

Full Application Brentwood
28 Jul 2026 Pending Consideration 26/00696/HHA

16 La Plata Grove Brentwood Essex CM14 4LA

Two storey side and single storey rear extension with the addition of two rear dormers.

Householder Application Brentwood
23 Jul 2026 Pending Consideration 26/00782/HHA

Larchwood Wambrook Close Hutton Essex CM13 2LR

Two single-storey rear extensions, loft conversion with one rear dormer, new entrance porch, new outbuilding and new front gates.

Householder Application Brentwood
22 Jul 2026 Refused 26/00695/S192

3 Albany Road Pilgrims Hatch Essex CM15 9PJ

Application for a lawful development certificate for a proposed use or development for the construction of a single storey rear extension and x1 roof ...

Certificate of Lawfulness (proposed) Brentwood
22 Jul 2026 Pending Decision 26/00743/HHA

Bell Meadows 8 The Quorn Ingatestone Essex CM4 9HE

Infill extensions to the front, single storey infill extension to the side next to the garage, and double storey to the rear. Part single, part double...

Householder Application Brentwood
20 Jul 2026 Refused 26/00656/HHA

Castleton Days Lane Doddinghurst Essex CM15 9SL

Construction of a detached car port

Householder Application Brentwood
20 Jul 2026 Approved 26/00825/HHA

59 Brocksparkwood Hutton Essex CM13 2TJ

Construct single storey rear extension and alterations to fenestration

Householder Application Brentwood
17 Jul 2026 Refused 26/00764/PN42

108 Woodman Road Warley Essex CM14 5AZ

Demolish existing rear extension and add single storey rear extension. The proposed extension would extend 3m beyond the rear wall of the original dwe...

Prior Notification 42 Days Householder Brentwood
16 Jul 2026 Approved 26/00688/HHA

Burgates 6 Friars Avenue Shenfield Essex CM15 8HY

Reconfigure roof incorporating removal of chimneys, raised ridge with hip to half hip and rear dormer, side roof lights and alterations to fenestratio...

Householder Application Brentwood
16 Jul 2026 Pending Consideration 26/00703/HHA

143 Priests Lane Shenfield Essex CM15 8HJ

Single storey rear extension, rear dormer, rooflights to front face of roof and new porch.

Householder Application Brentwood
13 Jul 2026 Approved 26/00784/HHA

Hall Barn House Moat Close Church Lane Doddinghurst Essex CM15 0NG

Single storey side/rear infill extension, conversion of garage to habitable accommodation with lean-to roof over whole side elevation and infill front...

Householder Application Brentwood
13 Jul 2026 Pending Decision 26/00783/S192

42 Edwards Way Hutton Essex CM13 1BT

Application for a Lawful Development Certificate for a Proposed Use or Development for the demolition of existing rear extension and construction of a...

Certificate of Lawfulness (proposed) Brentwood
10 Jul 2026 Pending Decision 26/00596/FUL

12 High Street Brentwood Essex CM14 4AB

Internal alterations to all floors, replacement of fenestration within existing ground floor extensions, and alterations to rear area in connection wi...

Full Application Brentwood
10 Jul 2026 Pending Decision 26/00597/LBC

12 High Street Brentwood Essex CM14 4AB

Internal alterations to all floors, replacement of fenestration within existing ground floor extensions, and alterations to rear area in connection wi...

Listed Building Consent Brentwood
10 Jul 2026 Pending Consideration 26/00823/HHA

6 Bird Lane Great Warley Essex CM13 3JU

Two storey side extension, Single storey rear extension & internal alterations

Householder Application Brentwood
10 Jul 2026 Pending Consideration 26/00652/HHA

Gloster Hunters Chase Hutton Essex CM13 1SN

Replacement of fire damaged garage and workshop outbuilding.

Householder Application Brentwood
9 Jul 2026 Pending Consideration 26/00615/HHA

54 Park Avenue Hutton Essex CM13 2QP

Demolition of detached garage and removal of chimney. Construction of Two storey front and side extensions to both left and right flank elevations, pa...

Householder Application Brentwood
9 Jul 2026 Pending Consideration 26/00779/HHA

318 Ongar Road Brentwood Essex CM15 9HR

Proposed outbuilding/hobby room to the rear of the garden.

Householder Application Brentwood
8 Jul 2026 Approved 26/00776/S192

71 Hatch Road Pilgrims Hatch Essex CM15 9PU

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

Certificate of Lawfulness (proposed) Brentwood
7 Jul 2026 Approved 26/00366/HHA

49 Heybridge Road Ingatestone Essex CM4 9AQ

Demolish existing lean to conservatory with roof lantern and construct single storey rear extension. The addition of x1 roof light to the existing rea...

Householder Application Brentwood
7 Jul 2026 Refused 26/00733/PN42

Dudbrook Coach House Howard Lodge Road Navestock Essex CM14 5TG

Demolition of existing rear extension and construction of two proposed single storey rear extensions. The proposed extensions would extend up to 8 met...

Prior Notification 42 Days Householder Brentwood
6 Jul 2026 Pending Decision 26/00655/PN42

13 Normanhurst Hutton Essex CM13 1BG

Prior Approval application for a single-storey rear extension. Proposed extension would extend 4.63m beyond the rear wall of the original dwelling, th...

Prior Notification 42 Days Householder Brentwood
6 Jul 2026 Pending Decision 26/00645/HHA

Woodseats Hunters Chase Hutton Essex CM13 1SN

Increase in ridge height to form rooms in the roof and front dormers

Householder Application Brentwood
6 Jul 2026 Decided 26/00759/PN42

Glengarry 13 The Dell Great Warley Essex CM13 3AL

Single storey side extension. The proposed extension would extend 5m beyond the side wall of the original dwelling, the maximum height of the proposed...

Prior Notification 42 Days Householder Brentwood
6 Jul 2026 Decided 26/00482/PN42

26 Mascalls Lane Brentwood Essex CM14 5LR

Single storey rear extension. The proposed extension would extend 5m beyond the rear wall of the original dwelling, the maximum height of the proposed...

Prior Notification 42 Days Householder Brentwood
3 Jul 2026 Pending Consideration 26/00746/S192

9 Park Avenue Hutton Essex CM13 2QL

Application for a Lawful Development Certificate for a proposed use or development for changes to fenestration

Certificate of Lawfulness (proposed) Brentwood
3 Jul 2026 Pending Decision 26/00753/S192

36 Vine Way Brentwood Essex CM14 4UU

Application for a Lawful Development Certificate for a Proposed Use or Develop for the conversion of existing integral garage to habitable accommodati...

Certificate of Lawfulness (proposed) 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.