Keymers Chapel Croft Chipperfield Kings Langley Hertfordshire WD4 9EQ Data via plota.co.uk

26/01277/RET - Retention of Development Approved

Proposal

Retention of three rooflights at Keymers Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
8 Jun 2026
✓
Consultation
10 Jun 2026
✓
Approved
6 Aug 2026

Approved on 6 Aug 2026 · Delegated Decision · Last checked 12 Aug 2026

Site constraints 7

Green belt: London
Inappropriate development needs very special circumstances.
Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.
Read the government guidance ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
Conservation area 24 m away: Chipperfield; Radon affected area, class 4; Inside the Chipperfield built-up area; Priority habitat 43 m away: Deciduous woodland; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 3, but it predates the buildings here and the current map does not class it as farmland.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area214 m² (2,303 sq ft)
Energy ratingB (86 out of 100)
PropertyDetached house
Built2021
HeatingBoiler and underfloor heating, mains gas
WallsAverage thermal transmittance 0.16 W/m²K

From the energy performance certificate lodged in April 2021, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Dacorum
Application type
Retention of Development
Postcode
WD4 9EQ
Received
8 Jun 2026
Validated
8 Jun 2026
Ward
Bovingdon / Flaunden / Chipperfield
Parish
Chipperfield Parish Council
Case officer
Show
Target decision
7 Aug 2026
Decision
Grant Permission/Consent
Decision date
6 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
James Holmes Planning Ltd

How this decision compares

Decided in 59 days from validation, 9 days slower than Dacorum's median of 50 for extensions. Approved, as 89% of extensions here are.

87%decided within 8 weeks
89%approved
654decided in the last year

Plota live figures for extensions decided by Dacorum in the last twelve months, from validation. Dacorum decision record →

Public comments

No public comments yet.

4 neighbours consulted · Last counted 12 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14950988
Planning Portal ref
PP-14950988
Neighbours
10 Jun 2026
Consultation
10 Jun 2026
Comments by
5 Aug 2026
Site or press notice
15 Jul 2026
Env. assessment
No
Dacorum
Planning Authority Score
7.3/10
Good
#51 of 296 councils
Relevant to this application:
Householder decisions

Dacorum is faster than most councils at deciding householder applications, ranking #50 out of 296. Only 22% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Householder applications are slightly more likely to be approved here (91%) than the national average (90%).

Faster than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Dacorum decision statistics
Based on MHCLG data, the year to March 2026
88%
Overall approval rate
Above avg (87%) #150 of 296
91%
Householder approved
Above avg (90%) #171 of 296
78%
Decided in 8 weeks
Above avg (63%) #50 of 296
22%
Extended time limit
Below avg (41%) #22 of 296
76%
Minor dwellings approved
127 decided (1-9 homes)
79%
Major dwellings approved
14 decided (10+ homes)
71%
Change of use approved
21 decided
1,130
Total decisions
132 refused in the year to March 2026

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.