Outbuilding and garden room planning approval rate in Dacorum
89% of 399 decided outbuilding and garden room applications in Dacorum 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.
89%
Approval rate, all years, from 399 decided
399
decided outbuilding and garden room applications in Dacorum: 354 approved, 45 refused
88%
Recent rate, decided since 2022, from 179 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 Withdrawn applications are excluded.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 Dacorum
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 |
|---|---|---|---|
| 25/02819/FHA | 2026 | Approved | Demolition of existing timber shed and garage and construction of new outbuilding with pitched roof. 15 The Back Potten End Berkhamsted Hertfordshire HP4 2QS |
| 25/02986/FUL | 2026 | Approved | Erection of a 'garden room' ancillary to the main dwelling house. 1 Bridgewater Hill Northchurch Berkhamsted Hertfordshire HP4 1LW |
| 25/03039/FHA | 2026 | Approved | Demolition of existing garage. Construction of outbuilding to provide games room. Demolition of existing stable building and replacement to provide annexe to... Hollybush Lodge Roe End Lane Markyate St Albans Hertfordshire AL3 8AH |
| 25/03041/FHA | 2026 | Refused | Conversion of existing outbuilding/ garage for domestic purposes, including a home office, studio, and shower room 100 - 104 Piccotts End Hemel Hempstead Hertfordshire HP1 3AT |
| 25/03042/LBC | 2026 | Refused | Conversion of existing outbuilding/ garage for domestic purposes, including a home office, studio, and shower room 100 - 104 Piccotts End Hemel Hempstead Hertfordshire HP1 3AT |
| 24/02853/LDP | 2025 | Refused | Construction of new outbuilding to form swimming pool enclosure The Pyghtle Luton Road Markyate St Albans Hertfordshire AL3 8QD |
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 Dacorum
- Single-storey rear extension 95%, 1,607 decided
- Two-storey rear extension 92%, 841 decided
- Wraparound extension 93%, 266 decided
- Side extension 94%, 775 decided
- Loft conversion and dormer 88%, 413 decided
- Rooflight 94%, 396 decided
- Porch 95%, 208 decided
- Garage conversion 95%, 209 decided
- Basement 87%, 79 decided
- Window and door 93%, 407 decided