Tremethick Budock Vean Lane Mawnan Smith Falmouth Cornwall TR11 5LH Data via plota.co.uk

Proposal

Demolition of existing cedar shingle roof and dormers, demolition of existing from gable, new raised roof and front gable with minor extensions and full internal refurbishment. Landscaping alterations around curtilage of house. Removal of Turkey Oak tree. Proposed PV and Battery. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
20 Jul 2026
✓
Consultation
29 Jul 2026
✓
Approved
1 Oct 2026

Approved on 1 Oct 2026 · Self Sign Off (Area Team) · Last checked 2 Oct 2026

Site constraints 7

Cornwall National Landscape
Great weight to conserving the landscape; major development restricted.
Previously an area of outstanding natural beauty, which is still the designation in law. Since 2023 authorities must seek to further its purpose, not merely have regard to it.
Special area of conservation 227 m away: Fal & Helford
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.
Habitat network: Network Expansion Zone
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Radon affected area, class 6
An estimated 30% or more 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 ↗
Also on the record
Inside the Helford Passage built-up area; Priority habitat 27 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 · Not green belt · No listed building 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.

Sales history 1

Last sold for £1,025,000 in July 2025. Detached house, freehold.

31 July 2025£1,025,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area184 m² (1,981 sq ft)
Energy ratingE (44 out of 100), could reach D
PropertyDetached house, 4 habitable rooms
Built1950 to 1966
HeatingBoiler and radiators, oil
WallsCavity wall, filled cavity

From the energy performance certificate lodged in June 2023, the latest held for this property. The building may have changed since. View the certificate

Work with planning data?

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

About Plota's data service

Important details

Council
Cornwall
Application type
Full application
Postcode
TR11 5LH
Received
20 Jul 2026
Validated
20 Jul 2026
Ward
Constantine, Mabe And Mawnan
Parish
Mawnan
Case officer
Show
Target decision
14 Sept 2026
Decision
Approved with conditions
Decision date
1 Oct 2026
Decision level
Self Sign Off (Area Team)
Applicant
Show
Agent
Koha Architects Ltd

How this decision compares

Decided in 73 days from validation, 19 days slower than Cornwall's median of 54 for demolitions. Approved, as 95% of demolitions here are.

78%decided within 8 weeks
95%approved
374decided in the last year

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

Public comments

2comments received
2 supporting

2 neighbours consulted · Last counted 2 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15092527
Planning Portal ref
PP-15092527
Neighbours
29 Jul 2026
Consultation
29 Jul 2026
Comments by
8 Sept 2026
Site or press notice
18 Aug 2026
Statutory expiry
14 Sept 2026
Env. assessment
No
Cornwall
Planning Authority Score
7.9/10
Good
#28 of 296 councils
Relevant to this application:
Householder decisions

Cornwall is faster than most councils at deciding householder applications, ranking #64 out of 296. Householder applications are more likely to be approved here than most councils, with a 97% approval rate vs 90% nationally.

More permissive than most councils
97% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Cornwall decision statistics
Based on MHCLG data, the year to March 2026
92%
Overall approval rate
Above avg (87%) #79 of 296
97%
Householder approved
Above avg (90%) #28 of 296
76%
Decided in 8 weeks
Above avg (63%) #64 of 296
35%
Extended time limit
Below avg (41%) #101 of 296
82%
Minor dwellings approved
1180 decided (1-9 homes)
94%
Major dwellings approved
67 decided (10+ homes)
93%
Change of use approved
194 decided
4,839
Total decisions
363 refused in the year to March 2026

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

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.