Planning application
26/03566/FULL
25 Marne Street London W10 4JE
Proposal
Erection of a rear single storey side infill extension at ground floor level and replacement of the existing sash windows to match original.
As published by the council, reference 26/03566/FULL
Timeline
Dates from the published record
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1 Jun 2026
Received by Westminster
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4 Jun 2026
Validated
Checked as complete and ready for consideration.
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21 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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25/08184/TCA Awaiting decision
81 Third Avenue London W10 4HU
TREE IDENTIFICATIONT1, T2 & T3 ? Conifer trees (possibly Leyland Cypress or Yew). Located along the rear boundary of No. 79 Third Avenue, as shown on the accompanying sketch plan. The trees are positioned in a line adjacent to the garden wall separating No. 79 Third Avenue and No. 1 Marne Street. DESCRIPTION OF WORKSProposed works: Fell three mature conifer trees (T1, T2, and T3) to ground level. Access for works: Via Marne Street (marked ?X? on the submitted sketch plan). Stump treatment: Due to restricted access to the rear garden, there is no feasible access for mechanical stump grinding. Following felling, the stumps will be treated using eco-plug herbicide to prevent regrowth. The area will then be landscaped, and new planting will be arranged around the treated stumps to maintain visual amenity. Replacement planting: One ornamental replacement tree (e.g. Amelanchier lamarckii or Betula utilis var. jacquemontii) will be planted within the rear garden to sustain tree cover and biodiversity. REASON FOR WORKS The three conifer trees have become excessively tall and dense for the confined garden setting, overshadowing both the applicant?s garden and neighbouring properties. The dense canopy significantly reduces daylight to the rear garden and habitable rooms of No. 79, impacting residential amenity. Their proximity to the house and boundary wall creates ongoing maintenance and structural concerns, including root pressure and leaf/needle debris accumulation. The trees? location and density contribute to reduced airflow and increased dampness, which has led to a noticeable influx of spiders (including large house spiders) and mosquito activity inside the property. The proposed works will alleviate shading, dampness, and pest issues while improving the garden?s usability and condition. Replacement planting will ensure that the site retains appropriate greenery and amenity value consistent with Westminster?s tree protection objectives. ADDITIONAL P
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25/07293/FULL Awaiting decision
25 Nutbourne Street London W10 4HW
Installation of security camera to front elevation (retrospective)
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26/04111/FULL Awaiting decision
39 Kilravock Street London W10 4HX
Replacement of lean-to glass roof to the rear side return with a new like-for-like glass roof; replacement of rear first floor windows with double glazed timber sash windows; replacement of a window in the rear GF with larger double glazed timber casement window; replacement of a door in the rear GF with larger double glazed timber French door; new conservation rooflight to the outrigger roof.
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25/07856/TCA Awaiting decision
65 Third Avenue London W10 4HU
T1 - cherry tree (8m) - reduce crown by approximately 2m, remove branches overhanging #65 and sever and shave ivy back to main stem.
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25/05559/TCA Granted
72 Kilravock Street London W10 4HY
1 x False acacia (rear): fell
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26/03342/TCA Awaiting decision
4 Nutbourne Street London W10 4HN
Gleditsia 30% Crown reduction (shorten branches gy 2-3m) Excessive shading. Prudent, periodic tree management.
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Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
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Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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