21 Heol Isaf Nelson Treharris CF46 6NS

1. 10 Jul 2026

   Received by Caerphilly

2. 14 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 28 Jul 2026

   Added to PlanIndex

4. 4 Sep 2026

   Decision issued: Granted

Caerphilly granted permission on 4 September 2026, subject to any conditions on the decision notice. Work must normally begin within five years or the permission lapses. More in our guide to what happens after a planning decision.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 24 Heol Isaf Nelson Treharris CF46 6NS

  26/0301/CLPU Submitted 22 Apr 2026 50 yards away

  Obtain Certificate of Lawful Proposed Development for proposed rear single storey extension

  Granted Lawful development Extension 8 docs
  Small domestic

• 25 Heol Isaf Nelson Treharris CF46 6NS

  21/0250/FULL Submitted 9 Mar 2021 50 yards away

  Erect conservatory to the rear of property

  Granted Full applications Extension 8 docs

• 11 Heol Isaf Nelson Treharris CF46 6NS

  23/0305/HH Submitted 3 May 2023 50 yards away

  Erect rear extension and new side garage

  Granted Householder Extension 6 docs
  Domestic

• 6 Heol Isaf Nelson Treharris CF46 6NS

  26/0050/HH Submitted 22 Jan 2026 100 yards away

  Erect rear roof extension, raise the ridge and rear dormer

  Granted Householder Extension Loft or dormer +1 10 docs
  Domestic

• 21 Beech Tree Way Nelson Treharris CF46 6NU

  24/0798/TPO Submitted 1 Nov 2024 150 yards away

  Carry out various tree works (Tree Preservation Order 48/82/RVDC)

  Granted Trees 5 docs

• 1 Mountain Way Nelson Treharris CF46 6NY

  24/0799/TPO Submitted 4 Nov 2024 200 yards away

  Remove dead wood from tree overhanging from T4 (Tree Preservation Order 48/82/RVDC)

  Granted Trees 7 docs

• 26/0528/HH Granted

  Bryncanol Ty Canol Lane Machen Caerphilly CF83 8QE

  Demolish existing lean-to rear extension, raise ridge height, erect first-floor front extension, convert loft to include two dormers to the front and two dormers to the rear and associated landscaping works, including extending the existing terrace to the front

  Received 5 Aug, published by the council 14 Aug 2026 Householder
• 26/0649/HH Awaiting decision

  Graig View Cottage The Row To Gwern-y-goytre Draethen Newport NP10 8GF

  Erect a raised decking area

  Received 28 Sep, published by the council 5 Oct 2026 Householder
• 26/0505/HH Granted

  18 Redbrook Avenue Trethomas Caerphilly CF83 8DB

  Erect split level two storey extension to rear of property

  Received 30 Jul, published by the council 7 Aug 2026 Householder
• 26/0383/HH Refused

  Woodland Cottage Cwmnofydd Farm Lane Machen Caerphilly CF83 8NR

  Erect two storey rear extension

  Received 2 Jun, published by the council 28 Jul 2026 Householder
• 26/0503/HH Granted

  13 Ebbw Meadow Abercarn Newport NP11 5GL

  Erect a double storey rear extension with a single storey side extension

  Received 28 Jul, published by the council 7 Aug 2026 Householder