2 and 4 Clarence Street Darwen BB3 1HQ Data via plota.co.uk

10/26/0523 - Full Planning Application Approved

Proposal

Change of use of existing dwellinghouses to form 3 No. 1 bed self-contained flats (Use Class C3) Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
4 Jun 2026
✓
Validated
24 Jul 2026
✓
Approved
17 Sept 2026

Approved on 17 Sept 2026 · Delegated · Last checked 30 Sept 2026

Site constraints 7

Radon affected area, class 5
An estimated 10 to 30% of homes reach the radon action level. Indicative for the 1 km square, which takes the highest class found in it; a radon test gives the answer for a building.
From the British Geological Survey and UK Health Security Agency indicative atlas. Under building regulations, as the BRE guide BR 211 (2023) sets out, new buildings and extensions need basic radon protection from class 3 in England and Wales and from class 2 in Scotland, and full protection from class 5. The class at the site itself, from the detailed BGS map, decides which.
UKHSA radon ↗
Local nature reserve about 290 m away: Sunnyhurst Woods
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Also on the record
Coalfield, development low risk area; Registered park or garden about 216 m away: Sunnyhurst Woods; Inside the Darwen built-up area; Priority habitat about 28 m away: Deciduous woodland; Flood defence about 47 m from the postcode pin (natural high ground, designed for a 1 in 35 year flood).
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the Mining Remediation Authority, 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.

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Important details

Council
Blackburn
Application type
Full Planning Application
Postcode
BB3 1HQ
Received
4 Jun 2026
Validated
24 Jul 2026
Parish
Blackburn
Case officer
Show
Target decision
18 Sept 2026
Decision
PERMITS
Decision date
17 Sept 2026
Decision level
Delegated
Applicant
Show
Agent
Studio FRI

How this decision compares

Decided in 55 days from validation, about the council's usual 55 days. Approved, as 79% of changes of use here are.

64%decided within 8 weeks
79%approved
10%go to committee

Plota live figures for changes of use decided by Blackburn in the last twelve months, from validation. Blackburn decision record →

Consultation & key dates

Statutory expiry
18 Sept 2026
Blackburn
Planning Authority Score
7.2/10
Good
#55 of 296 councils
Relevant to this application:
Change of use

Blackburn is faster than most councils at deciding householder applications, ranking #90 out of 296. Householder applications are more likely to be approved here than most councils, with a 98% approval rate vs 90% nationally.

More permissive than most councils
98% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Blackburn decision statistics
Based on MHCLG data, the year to March 2026
96%
Overall approval rate
Above avg (87%) #7 of 296
98%
Householder approved
Above avg (90%) #10 of 296
73%
Decided in 8 weeks
Above avg (63%) #90 of 296
40%
Extended time limit
Below avg (41%) #147 of 296
88%
Minor dwellings approved
40 decided (1-9 homes)
100%
Major dwellings approved
7 decided (10+ homes)
86%
Change of use approved
56 decided
519
Total decisions
23 refused in the year to March 2026