Two-storey rear extension planning approval rate in North Hertfordshire
35% of 95 decided two-storey rear extension applications in North Hertfordshire 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.
35%
Approval rate, all years, from 95 decided
95
decided two-storey rear extension applications in North Hertfordshire: 33 approved, 62 refused
24%
Recent rate, decided since 2022, from 34 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 Withdrawn applications are excluded.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 two-storey rear extension decisions in North Hertfordshire
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 |
|---|---|---|---|
| 25/02561/FPH | 2026 | Refused | Two storey and part single storey rear and side extension and front porch following demolition of existing rear element. (as a variation of planning permissi... 28 Common Rise Hitchin Hertfordshire SG4 0HN |
| 24/02291/FPH | 2025 | Refused | Two storey rear extension with solar roof panels, following demolition of existing conservatory, existing single storey rear extension and two rear dormer wi... 2 Eastholm Letchworth Garden City Hertfordshire SG6 4TN |
| 24/02292/LBC | 2025 | Refused | Two storey rear extension with solar roof panels, following demolition of existing conservatory, existing single storey rear extension and two rear dormer wi... 2 Eastholm Letchworth Garden City Hertfordshire SG6 4TN |
| 25/00455/LBC | 2025 | Approved | External and internal alterations to existing outbuilding to facilitate conversion into one 4-bed dwelling including raising ridge height and replacement roo... 9 High Street Barkway Royston Hertfordshire SG8 8EA |
| 25/00582/LDCE | 2025 | Approved | Two storey side and rear extension and single storey rear extension. 76 Shott Lane Letchworth Garden City Hertfordshire SG6 1SE |
| 25/02233/LBC | 2025 | Approved | Two storey side/rear extension, raise existing roof ridge height of main dwelling and existing garage and replace existing tiles and fascia boards, alteratio... 221 Icknield Way Letchworth Garden City Hertfordshire SG6 4TU |
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 North Hertfordshire
- Single-storey rear extension 80%, 350 decided
- Wraparound extension 40%, 15 decided
- Side extension 53%, 90 decided
- Loft conversion and dormer 77%, 95 decided
- Rooflight 92%, 221 decided
- Outbuilding and garden room 70%, 79 decided
- Porch 89%, 35 decided
- Garage conversion 86%, 74 decided
- Basement 93%, 14 decided
- Window and door 91%, 270 decided