85 High Street Nelson Treharris CF46 6HA Data via plota.co.uk

26/0498/HH - Householder Application Awaiting decision

Proposal

Demolish existing single storey rear extension and erect a two storey side extension and single storey rear extension Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
28 Jul 2026
✓
Validated
29 Jul 2026
✓
Consultation
5 Aug 2026
Decision
Expected by 29 Oct 2026

Under consideration

No decision has been issued yet. Plota predicted a decision around 9 Oct 2026; it is now day 72.

The consultation period closed on 26 Aug 2026.

Site constraints 3

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 ↗
Also on the record
Conservation area 43 m away: Nelson; Coalfield, development low risk area.
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 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.

Sales history 1

Last sold for £182,500 in April 2020. Semi-detached house, freehold.

3 April 2020£182,500

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

Building

Floor area78 m² (840 sq ft)
Energy ratingD (60 out of 100), could reach B
PropertySemi-detached house, 4 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSandstone or limestone, as built, no insulation (assumed)

From the energy performance certificate lodged in September 2019, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Caerphilly
Application type
Householder Application
Postcode
CF46 6HA
Received
28 Jul 2026
Validated
29 Jul 2026
Ward
Nelson
Case officer
Show
Target decision
29 Oct 2026
Decision level
Delegated
Applicant
Show
Agent
H D Williams Ltd

Decision outlook

Day 72, past the statutory target. 97% of demolitions in Caerphilly are decided within thirteen weeks, which runs to 28 Oct 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 6 Oct 2026.

Day 7216 days past the 56-day target
70%decided within 8 weeks
63%approved
33decided in the last year

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

Public comments

No public comments yet.

6 neighbours consulted · Last counted 6 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Neighbours
5 Aug 2026
Consultation
5 Aug 2026
Comments by
26 Aug 2026
Statutory expiry
23 Sept 2026
Env. assessment
No

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.