21 Danesbury Park Road Welwyn Hertfordshire AL6 9SH Data via plota.co.uk

26/01621/LDCP - Lawful Development Certificate Proposed Approved

Proposal

Two storey rear extension following removal of existing single storey rear elements Data via plota.co.uk

View original council record ↗Last checked

Application progress

Received
8 Jul 2026
Approved
28 Jul 2026

Approved on 28 Jul 2026 · Delegated · Last checked 28 Jul 2026

Site constraints 4

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.
1 listed building within 150 m
Nearest: The Old House, Grade II, 50 m away
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Historic England ↗
Also on the record
Inside the Woolmer Green built-up area; Open access land 32 m away: Access Land - Combined Open Country, Registered Common Land and Section 16 Dedicated Land. MoD Byelaw, Section 28 Exclusions, Racecourses and Aerodromes and ECP Margin have been removed..
Not affected
Outside flood zones 2 and 3 · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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.

Work with planning data?

Every application in North Hertfordshire - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Important details

Application type
Lawful Development Certificate Proposed
Postcode
AL6 9SH
Received
8 Jul 2026
Validated
8 Jul 2026
Ward
Knebworth Ward
Parish
Codicote Parish Council
Case officer
Show
Decision
Granted
Decision date
28 Jul 2026
Decision level
Delegated
Applicant
Show

How this decision compares

Decided in 20 days from validation, 28 days faster than North Hertfordshire's median of 48 for extensions. Approved, as 91% of extensions here are.

79%decided within 8 weeks
91%approved
439decided in the last year

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

Consultation & key dates

Alt. reference
PP-15029782
North Hertfordshire
Planning Authority Score
6.9/10
Good
#66 of 296 councils
Relevant to this application:
Householder decisions

North Hertfordshire ranks #128 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (95%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
North Hertfordshire decision statistics
Based on MHCLG data, the year to March 2026
93%
Overall approval rate
Above avg (87%) #62 of 296
95%
Householder approved
Above avg (90%) #87 of 296
69%
Decided in 8 weeks
Above avg (63%) #128 of 296
32%
Extended time limit
Below avg (41%) #65 of 296
82%
Minor dwellings approved
112 decided (1-9 homes)
84%
Major dwellings approved
19 decided (10+ homes)
90%
Change of use approved
21 decided
1,102
Total decisions
82 refused in the year to March 2026