Planning application
89 Sebastian Avenue Shenfield Essex CM15 8PP
Works: Extension Loft or dormer Small domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Extend hipped roof to gable and add rear dormer, construct first floor side and single storey rear extensions
As published by the council, reference 26/00837/HHA
Application record
- Reference
- 26/00837/HHA
- Type
- Householder Application
- Status
- Pending Consideration
- Received
- 18 Aug 2026
- Validated
- 18 Aug 2026
- Ward
- Shenfield
- Postcode
- CM15 8PP
Site history
Applications at this address on the Brentwood register
This site has had 3 applications since 2026: 2 approved, 0 refused.
-
26/00417/HHA Granted
89 Sebastian Avenue Shenfield Essex CM15 8PP
Single storey rear extension and part conversion of garage to habitable accommodation.
-
26/00321/S192 Granted
89 Sebastian Avenue Shenfield Essex CM15 8PP
Application for a Lawful Development Certificate for a Proposed Use or Development for a hip to gable roof with rear dormer, together with rooflights on the front roofslope.
Timeline
Dates from the published record
-
18 Aug 2026
Received by Brentwood
-
1 Sep 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 13 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Brentwood took a median of 69 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
A9 Architecture Ltd Agent, an architecture practice registered in Benfleet
Active · incorporated 2010 · Benfleet
116 applications on PlanIndex · across 9 councils · 85% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
12 documents on file for this application
- 07 /G PROPOSED ROOF PLAN
- APPLICATION FORM
- 02/G BLOCK PLAN
- 03/G EXISTING FLOOR LAYOUT
- 04/G EXISTING SECTION
- 05/G EXISTING ELEVATIONS
- 06/G PROPOSED FLOOR LAYOUT
- 08/G PROPOSED SECTION
- 09/G PROPOSED ELEVATIONS
- 3D VISUAL REV G
- 01/G SITE LOCATION
- SUPPORTING STATEMENT
Watch members (£5 a month) open the document list from here.
Open the documentsWhat happens while it is decided
This application is with Brentwood for determination, against a statutory target of eight weeks. Over the last year Brentwood decided householder applications in a median of 83 days. More in our guide to how long planning decisions take.
About householder applications
Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
89 Sebastian Avenue Shenfield Essex CM15 8PP
Application for a Lawful Development Certificate for a Proposed Use or Development for a hip to gable roof with rear dormer, together with rooflights on the front roofslope.
Granted Lawful development Loft or dormer 12 docs -
89 Sebastian Avenue Shenfield Essex CM15 8PP
Single storey rear extension and part conversion of garage to habitable accommodation.
Granted Householder Extension 12 docsSmall domestic -
87 Sebastian Avenue Shenfield Essex CM15 8PP
Demolish garage, raise ridge and add part single part two storey, part first floor side and rear extensions, add rear dormer, rooflights, solar panels and front entrance, provision of side garage/store, alterations to fenestration. Construct raised patio, pergola and outbuilding within rear garden (revised application to 25/00982/HHA)
Granted Householder Extension Loft or dormer +2 22 docsSmall domestic -
85 Sebastian Avenue Shenfield Brentwood Essex CM15 8PP
Demolition of existing dwelling, construction of new detached dwelling.
Refused Full applications New dwelling Demolition 11 docsDomestic -
85 Sebastian Avenue Shenfield Brentwood Essex CM15 8PP
Variation of condition 2 of application 22/00180/FUL (Demolition of existing dwelling, construction of new detached dwelling) for the change of external materials on the western elevation bay from brick, render and vertical tiles, to brick.
Granted Full applications New dwelling Demolition 9 docsDomestic -
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.
Refused Loft or dormer Windows or glazing
Other householder applications
In Brentwood
-
26/00843/HHA Awaiting decision
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 to be removed and a new roof created to cover the existing house and the new extensions. The new roof is to contain a second floor room and will include a rear dormer and 3 rooflights to front elevation.
-
26/01011/HHA Awaiting decision
Harrington House 24 Worrin Road Shenfield Essex CM15 8DE
Add hipped roof to front bay window
-
26/00988/HHA Awaiting decision
57 Kilworth Avenue Shenfield Essex CM15 8PT
Raise ridge to create two storey dwelling with rear extensions, pergola and layout drive
-
26/00986/HHA Awaiting decision
66 Avenue Road Ingatestone Essex CM4 9HB
Part single part two storey rear extension, part conversion of garage to habitable accommodation, apply render finish to dwelling, add AC unit to side
-
26/00980/HHA Awaiting decision
7 Weald Road Brentwood Essex CM14 4SX
Remove porch and construct part single part two storey front extension