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3 Heol Morien Nelson Treharris CF46 6JA

26/0159/HHHouseholder ApplicationRefused
Householder

Refused on 26 August 2026

Delegated (officer decision)2 reasons for refusal

Approximate site (title boundary)
Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

Proposal

Erect first floor rear extension

Received
5 March 2026
Decision level
Delegated (officer decision)
Ward
Nelson
  1. Received5 Mar
  2. Validated24 Apr
  3. Consult.18 May
  4. Target26 Aug
  5. Decided26 Aug

Decided in 124 days (council typically 56)

About this application

This is a full planning application for a rear extension at 3 Heol Morien Nelson Treharris CF46 6JA. Caerphilly has handled 4,476 applications of this type. This one was decided in 174 days, 17 weeks longer than Caerphilly's typical decision time. There have been 2 other applications at this address. In the past year there have been 53 applications across Nelson. We hold 773 applications in total for the CF46 postcode area.

74% of full applications at Caerphilly County Borough Council were approved. Across all application types, the council typically decides in about 8 weeks (median).

Based on decided applications received in the last 3 years.See what's approved near your address

Why it was refused

  1. The proposed first-floor rear extension, by reason of its scale, width, massing and siting, would result in a dominant and disproportionate addition that would fail to appear subordinate to the host dwelling and would be harmful to the character and appearance of the dwelling and surrounding area. The proposal is therefore contrary to Policy SP6 of the Caerphilly County Borough Local Development Plan.
  2. The proposed first-floor rear extension, by reason of its scale, height, proximity to neighbouring properties and cumulative relationship with existing built development on the site, would result in an unacceptable overbearing and enclosing impact upon neighbouring occupiers, particularly at No. 5 Heol Morien, together with increased overshadowing and loss of outlook detrimental to residential amenity. The proposal is therefore contrary to Policy CW2 of the Caerphilly County Borough Local Development Plan and the Council's adopted Residential Extensions Supplementary Planning Guidance.

From the council's decision notice.

Application details

Postcode
CF46 6JA
Application type
Householder Application
Scale / size
Medium

Planning application dates

Date validated
24 April 2026
Consultation expiry
18 May 2026
Consultation start
27 April 2026
Consultation end
18 May 2026
Neighbour consultation start
27 April 2026
Neighbour consultation end
18 May 2026
Last date for comments
18 May 2026
Target decision date
26 August 2026
Permission expires
26 August 2031

Applicant and agent

Agent address
123 Trealaw Road Tonypandy CF40 2NP

Planning decision

Statutory period
124 days

Additional information

Documents
7
Constraints
5

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Source: Caerphilly

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