17 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ Data via plota.co.uk

P/26/0050 - Certificate of Lawfulness Approved
Extensions & alterations

Proposal

Certificate of Lawfulness for single storey rear extension Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
12 Mar 2026
✓
Approved
1 Apr 2026

Approved on 1 Apr 2026 · Delegated Decision · Last checked 5 Jul 2026

Documents

View the documents on the council's website ↗

Site constraints 4

Coal mining development high risk area
Recorded coal mining features at or near the surface. Most planning applications here need a coal mining risk assessment.
From the Mining Remediation Authority, formerly the Coal Authority. The development high risk area marks recorded coal mining features at or near the surface: mine shafts and adits, shallow workings, mine gas and former opencast sites. Most planning applications there need a coal mining risk assessment; householder applications, changes of use and some minor works are exempt. Mine entry positions come from old plans and can be out by several metres, and unrecorded workings can exist anywhere in the coalfield.
Coal mining risk assessments ↗
Agricultural land, grade 5
Very poor quality farmland, not best and most versatile. Source: the Predictive Agricultural Land Classification Map (Defra and Natural England, 2025; the Welsh Government's Predictive ALC Map 2 in Wales), a model rather than a site survey. A site survey can differ.
Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.
SSSI about 58 m away: Cwm Glo a Glyndyrys
Natural England may need consulting, depending on what is proposed.
Sites of special scientific interest are the best wildlife and geological sites in the country. Development likely to harm one is rarely permitted.
Also on the record
Radon affected area, class 4.
Not affected
Outside flood zones 2 and 3 · 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.

Sales history 1

Last sold for £175,000 in June 2013. Detached house, freehold.

28 June 2013£175,000New build

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

Building

Floor area94 m² (1,012 sq ft)
Energy ratingB (83 out of 100)
PropertyDetached house
Built2012
HeatingBoiler and radiators, mains gas
WallsAverage thermal transmittance 0.28 W/m²K

From the energy performance certificate lodged in June 2012, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council
Merthyr Tydfil
Application type
Certificate of Lawfulness
Postcode
CF48 1TQ
Received
12 Mar 2026
Validated
12 Mar 2026
Ward
CYFARTHFA
Case officer
Show
Decision
Certificate of Law Granted
Decision date
1 Apr 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Show

How this decision compares

Decided in 20 days from validation, 28 days faster than Merthyr Tydfil's median of 48 for extensions. Approved, as 95% of extensions here are.

77%decided within 8 weeks
95%approved
58decided in the last year

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

Consultation & key dates

Env. assessment
No

Historical activity at this location

9 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2020 Withdrawn
Land Within The Curtilage Of Greenacres (Plot 5) Brondeg Heolgerrig Merthyr Tydfil
Renewal of outline planning permission P/16/0174 (with all matters reserved) for the erec…
P/19/0260
2020 Approved
10 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ
Proposed replacement and extension of rear decked area, shed and steps to lower garden ar…
P/20/0259
2020 Approved
26 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ
Single storey rear extension
P/20/0111
2019 Approved
15 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ
Non material amendment to planning permission P/15/0357 to relocate patio doors to side e…
P/19/0059
2018 Approved
25 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ
Construction of swimming pool and erection of retaining wall to the side of the property…
P/17/0223
2016 Approved
Land Rear Of 13 To 19 28 29 And 31 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil Merthyr Tydfil Ua
Change of use of land to provide a 1 metre wide landscape buffer (enclosed by fencing) to…
P/16/0111
2016 Approved
25 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ
Single storey rear extension
P/16/0251
2016 Approved
Land Within The Curtilage Of Greenacres (Plot 5) Brondeg Heolgerrig Merthyr Tydfil
Renewal of outline planning application P/11/0316 (with all matters reserved) for the ere…
P/16/0174
2016 Approved
40 Parc Cwm Pant Bach Heolgerrig Merthyr Tydfil CF48 1TQ
Conversion of attached garage into habitable room
P/16/0143

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

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.