Outbuilding and garden room planning approval rate in Stevenage
98% of 105 decided outbuilding and garden room applications in Stevenage 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.
98%
Approval rate, all years, from 105 decided
105
decided outbuilding and garden room applications in Stevenage: 103 approved, 2 refused
97%
Recent rate, decided since 2022, from 37 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 Withdrawn applications are excluded.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 outbuilding and garden room decisions in Stevenage
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 |
|---|---|---|---|
| 25/00718/FP | 2026 | Refused | Use of existing annexe as separate dwelling use class (C3) 1 Park Close Stevenage Herts SG2 8PX |
| 25/00899/CLPD | 2026 | Approved | Lawful Development Certificate (Proposed) for the use of the land to station a mobile home (granny annexe) 22 Lawrence Avenue Stevenage Herts SG1 3JX |
| 25/00094/FPH | 2025 | Approved | Installation of garden outbuilding 319 Archer Road Stevenage Herts SG1 5HF |
| 25/00211/FPH | 2025 | Approved | Outbuilding for use as annexe in rear garden and replacement conservatory roof with solid roof 34 Wood Drive Stevenage Herts SG2 8NY |
| 25/00224/FPH | 2025 | Approved | Retention of outbuilding 2 Morley Cottages Chells Lane Stevenage Herts SG2 7AA |
| 21/00388/FPH | 2021 | Refused | Erection of 1no. timber framed outbuilding to enclose a swimming pool in rear garden 140 Fairview Road Stevenage Herts SG1 2NS |
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 Stevenage
- Single-storey rear extension 94%, 818 decided
- Two-storey rear extension 91%, 448 decided
- Wraparound extension 96%, 153 decided
- Side extension 87%, 364 decided
- Loft conversion and dormer 91%, 87 decided
- Rooflight 90%, 101 decided
- Porch 98%, 95 decided
- Garage conversion 92%, 122 decided
- Basement 92%, 12 decided
- Window and door 98%, 186 decided