Dormer roof amendments at 16 Cranshaw Drive, Blackburn
Summary of planning committee decision
Decided by Blackburn Planning and Highways Committee on 19 Feb 2026.
What was proposed
The application sought retrospective approval for altered dormer windows, rooflights and the omission of side windows.
“Proposed development: Variation of Condition / Material Amendment for: Variation of Condition No.2 "approved drawings" and removal of Condition No. "obscure glazing to side window serving bedroom 5", pursuant to planning application 10/23/0702 "Proposed raising of roof by approx. 1200mm and erection of dormers to create additional living space" - omission of side windows, installation of roof lights and alterations to windows to the dormer extensions (retrospective).”
Officer report
The site
The site is a detached dwelling in an urban suburban residential area with varied single- and double-storey homes.
“The application site (the site) relates to a detached dwelling to the south of Cranshaw Drive, Blackburn. The site is located within the urban area, in accordance with the Local Plan.”
“The area is defined as a sub-urban residential development featuring a varied range of house styles. This is particularly apparent on Cranshaw Drive which is characterised by differing single and double storey housing.”
Officer report
Earlier permissions
Earlier permissions covered roof raising and dormers, including the permission that this application sought to amend.
“10/23/0702: Proposed raising of roof by approximately 1200mm and erection of dormers to create additional living space. Approved by P & H Committee June 2024.”
“10/22/0414: Proposed raising of whole roof by approximately 1200mm to create additional living space with internal alterations. Approved under delegated powers June 2022.”
Officer report
Officers’ recommendation
Officers recommended approval because the amendments were considered consistent with planning policies and capable of being controlled by conditions.
“Detailed assessment of the application finds that the amendments are acceptable as a development consistent with the Local Plan 2021 – 2037 and The National Planning Policy Framework.”
“The proposal is also satisfactory from a technical point of view, with all issues having been addressed through the application or capable of being controlled or mitigated through planning conditions…”
Officer report
Privacy and appearance
Officers considered that obscure glazing, rooflights and the amended dormer design would provide acceptable privacy, daylight and appearance.
“(side hinged) or tilting mechanism. Notwithstanding this point, installed windows to these rooms feature a horizontal top opening mechanism and glazing is obscure. As a bathroom and WC / ensuite, it is not unreasonable that the rooms benefit from opening windows. Photographs below taken inside the house of the WC and bathroom windows towards the rear of the house, in closest proximity to the rear garden space of no.”
“Design / Character & Appearance Policy CP8 confirms the need for all new development to be of a high standard consistent with principles set out in the National Design Guide, and the National Model Design Code, and relevant local design guidance. Development that is not well designed will be refused.”
Officer report
The committee’s decision
The committee approved the application subject to the conditions set out in the directors’ report.
“Decision under the Town and Country Planning Acts and Regulations:”
“That the application be approved subject to conditions set out in the Directors report.”
Minutes
Sources
- Blackburn Planning and Highways Committee minutes, 19 February 2026
- Agenda and papers (council website)
Source: Plota analysis of Blackburn's committee minutes and officer report. Quotations are the council's own words; headings and summaries are Plota's.
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- Council
- Blackburn
- Date
- Thursday 19 February 2026
- Committee decided
- Approved
- Minutes
- The council's minutes
- Meeting
- Agenda and papers (council website)
- Application
- View application →
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- Blackburn committee decisions →
This committee's year
45 decisions in the 12 months to this meeting.
Source: Plota analysis of the committee's minutes.