Side extension planning approval rate in Brentwood
81% of 1,023 decided side extension applications in Brentwood were approved.
Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England.
A similar project nearby can help you understand the council's decisions. Its outcome does not establish what will be acceptable at your address.
81%
Approval rate, all years, from 1,023 decided
1,023
decided side extension applications in Brentwood: 831 approved, 192 refused
84%
Recent rate, decided since 2022, from 350 decided
How to read these rates
These are historical outcomes for the applications in our archive, not the chance of approval for your property. Compare the same project type and read the decided count alongside each percentage.
About the planning data
Rate = approved divided by approved plus refused, using the decisions in our classified archive. Rates are withheld as unknown where fewer than 8 records of that project type were decided. Withdrawn applications are excluded.
Recent means records dated 2022 or later. Records without a year are excluded from the recent rate but remain in the all-years figure. Historical coverage varies by council, and duplicate application references may remain in the archive.
Approval rates from 2,343,419 decisions we classified across 181 councils in England. The wider 20.6 million application catalogue is accessible through PlanIT; it is not the dataset used to calculate these percentages.
Read the full methodology and coverage notes.
Project types and outcomes are classified from council records. Check the original application and decision notice before relying on an individual example. A page rebuild does not mean every council record has just been refreshed.
Example side extension decisions in Brentwood
These examples deliberately include approved and refused applications where available. They are not a representative sample or a list of the latest decisions. Look up each reference on the council's planning search to read the plans and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/01044/HHA | 2026 | Approved | Demolition of existing single storey side element. Construction of two storey side extension. Construction of front porch. Fenestration alterations. 3 Princes Way Hutton Essex CM13 2JN |
| 25/01142/HHA | 2026 | Approved | Demolition of existing conservatory and construction of side extension Humes Church Lane Hutton Essex CM13 1SB |
| 25/01187/HHA | 2026 | Approved | Part single, part two storey side extension. Single storey rear extension. Demolition of porch, replaced with porch canopy. 15 Coleridge Walk Hutton Essex CM13 2RT |
| 25/01283/LBC | 2026 | Refused | Proposed side extension to replace existing lean-to structure, renovation throughout & internal alterations to create new living space to rear single storey... Blue House Farm Magpie Lane Little Warley Essex CM13 3DT |
| 25/01291/HHA | 2026 | Refused | Proposed side extension to replace existing lean-to structure, renovation throughout & internal alterations to create new living space to rear single storey... Blue House Farm Magpie Lane Little Warley Essex CM13 3DT |
| 24/00989/HHA | 2025 | Refused | Demolition of existing garage. Construction of single storey side extension to include gable end front aspect and 2no. front dormer windows. Construction of... 133 Thorndon Avenue West Horndon Essex CM13 3TR |
About the planning data
Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England.
Other project types in Brentwood
- Single-storey rear extension 84%, 1,730 decided
- Two-storey rear extension 78%, 1,295 decided
- Wraparound extension 81%, 339 decided
- Loft conversion and dormer 73%, 365 decided
- Rooflight 80%, 386 decided
- Outbuilding and garden room 77%, 396 decided
- Porch 90%, 233 decided
- Garage conversion 90%, 198 decided
- Basement 81%, 99 decided
- Window and door 88%, 289 decided