Single-storey rear extensions in Barnet
Barnet approved 1,010 of the 1,249 planning applications for single-storey rear extensions it decided in the last five years (81%), and the typical decision took 56 days.
London Borough of Barnet · planning applications received Oct 2021 to Oct 2026 · updated 25 Oct 2026
Approved
1,010 of 1,249
81% of decided applications; 78 withdrawn, 146 undecided
Typical time to a decision
56 days
median, from 1,249 decisions with both dates published
Decided within 8 weeks
858 of 1,249
8 weeks is the usual statutory period; councils can agree extensions
See what was approved near your own address
The The Signal Report shows approvals and refusals for single-storey rear extensions within 250 m, 500 m and 1 km of your home, the council's reasons for refusing similar schemes, your property's planning history and the constraints on the plot. Free preview for any address.
Recent decisions
Roof extension including hip to gable, rear dormer window, and pitch roof over existing two storey flat roofed side extension with 3no. fro…
26/3179/HSE · decided 23 Oct 2026
- Approved24 Fairfield Way Barnet EN5 2BG
Single storey rear extension with gable end roof, 2no. rooflights and new patio area following demolition of the existing shed
26/3107/HSE · decided 22 Oct 2026
- Approved20 Dartmouth Road London NW4 3HU
Single storey rear extension with 2no. rooflights
26/3435/HSE · decided 20 Oct 2026
Single storey rear extension to provide 50 additional seating. Use of the rear extension as a shisha lounge including retractable roof. (Re…
26/3101/RCU · decided 19 Oct 2026
Single storey rear extension and relocation of the existing raised rear patio area. Changes to rear fenestration
26/2835/HSE · decided 19 Oct 2026
Why Barnet refuses single-storey rear extensions
The council's own words, quoted from recent decision notices.
71, Bulwer Road, New Barnet, EN5 5EU
“1 The proposed single storey rear extension, by reason of its size, scale, massing, bulk, design and excessive rearward depth backing off from an existing extension, would represent an overbearing and visually obtrusive addition resulting in an unacceptable loss of outlook, sunlight and increased sense of enclosure to No. 73 Bulwer Road, to the detriment of the residential amenities of neighbouring occupiers, contrary to Policies D3 and D6 of the London Plan (2021), Policies CDH01 and CDH05 of the LB Barnet Local Plan (2025) and the Sustainable Design and Development Guidance SPD (2026).”
89 And 91 Renters Avenue London NW4 3RD
“1 The proposed first-floor rear extensions, by reason of their excessive width, scale, bulk and cumulative presence across both properties, would form disproportionate and incongruous additions that fail to respect the established character and appearance of the host dwellings and the surrounding area. The extensions would result in an unsympathetic and visually intrusive form of development that is not reflective of the prevailing pattern of development within the locality. As such, the proposal would detract from the character and appearance of the street scene and wider area, contrary to P…”
24, Gresham Avenue, Whetstone, N20 0XL
“1 The proposed privacy screening, by reason of its relative height above ground level, excessive rearward projection and siting in proximity to neighbouring boundary, would appear overbearing and visually obtrusive and would result in an increased sense of enclosure, and undue loss of outlook, detrimental to the residential amenities of the neighbouring occupiers at No. 22 and 26 Gresham Avenue, contrary to Policy D3 of the London Plan (2021), Policies CDH01 and CDH05 of the LB Barnet Local Plan (2025), and the Sustainable Design and Development Guidance SPD (2026) 2 The proposed rear, baseme…”
Other home extensions in Barnet
- Loft conversions
625 of 900 approved (69%)
- Single-storey side extensions
217 of 246 approved (88%)
- Two-storey and first-floor extensions
720 of 1,042 approved (69%)
How these figures are made
Planning applications London Borough of Barnet received Oct 2021 to Oct 2026, from the council's public planning register as collected by Planning Signal. An application counts as a single-storey rear extension when its own description says so (rules-based classification, tested against blind labelled samples). Duplicate records of one application are counted once. The approval figure counts approved and refused planning applications only: withdrawn and undecided ones, lawful development certificates and prior approvals are left out. Decision times use the received (or validated) date and the decision date the council published.
Past decisions describe what happened to other applications. They are not a prediction for yours: every application is decided on its own design and the council's current policies.