Side extension planning approval rate in County Durham
92% of 65 decided side extension applications in County Durham 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.
92%
Approval rate, all years, from 65 decided
65
decided side extension applications in County Durham: 60 approved, 5 refused
88%
Recent rate, decided since 2022, from 16 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 Withdrawn applications are excluded. The eight-record threshold is a display rule, not a guarantee that a sample is statistically reliable.
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.
Coverage for this project type
Dated records in this archive span 2015 to 2026. 0 of 65 decided records have no year recorded. Coverage may have gaps within the date range.
16 decided records are dated 2022 or later. This is an archive count, not a measure of all current council activity.
These project categories can include different application routes and proposals combining several kinds of work. Read the proposal and decision type before comparing it with your project.
Check planning requirements in County Durham, or read about permitted development in County Durham. An approval rate does not decide which route your property qualifies for.
Example side extension decisions in County Durham
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.
Visit County Durham's official website to find its planning register and search the references below. Descriptions may be shortened.
| Reference | Year | Decision | Application |
|---|---|---|---|
| DM/25/03048/CEU | 2026 | Approved | Lawful development certificate to confirm that the development has commenced to trigger the commencement of the planning consent DM/21/01876/FPA (Demolition... Sidegate House Sidegate Durham DH1 5SY |
| DM/25/03189/FPA | 2026 | Refused | Two-storey side extension, part removal of garden wall and installation of gates to driveway 133 Harvey Avenue Framwellgate Moor Durham DH1 5ZB |
| DM/22/02228/FPA | 2024 | Approved | Demolish existing conservatory, convert garage into room, single storey side extension and extension of rear terraced area. Woodsyde Annfield Plain Stanley DH9 7XF |
| DM/23/02653/FPA | 2024 | Approved | Single storey side extension and part garage conversion 75 Illingworth Grove Durham DH1 3BL |
| DM/22/01125/FPA | 2022 | Refused | Two storey side extension Janelm Davis Terrace Easington Colliery Peterlee SR8 3JA |
| DM/18/03263/FPA | 2019 | Refused | Demolition of existing single storey side extension and erection of detached annex to be occupied by the applicant and his family (resubmission of Planning A... 15 Laburnum Crescent Trimdon Colliery Trimdon Station TS29 6BD |
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 County Durham
- Single-storey rear extension 99%, 102 decided
- Two-storey rear extension 94%, 48 decided
- Wraparound extension unknown, 7 decided
- Loft conversion and dormer 96%, 23 decided
- Rooflight 97%, 31 decided
- Outbuilding and garden room 93%, 30 decided
- Porch 100%, 23 decided
- Garage conversion 100%, 20 decided
- Basement unknown, 3 decided
- Window and door 99%, 90 decided