23 Sidmouth Avenue, Isleworth, TW7 4DW
About 23 Sidmouth Avenue
23 Sidmouth Avenue is a three-bedroom mid-terrace house in Isleworth (TW7 4DW). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (December 2022) shows a D (score 59), a step below the typical UK home. The recommended improvements would lift it to B (score 83), a 2-band jump.
One planning record on file: an extension approved in 2025. Past consents include an extension, meaningful when judging how the property has evolved. On a £-per-square-foot basis, the last sale (£706/sq ft) was about 63.4% above the typical sold price in the postcode. Most recent transfer: March 2023 at £585,000.
Know exactly what you're buying at 23 Sidmouth Avenue
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms3
- Bathrooms1
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
23 Sidmouth Avenue has an approved single-storey rear extension on the planning record.
- Sept 2025ExtensionOutlineIn report
Extension: Single storey · Rear of property
Prior Approval for the ground floor rear extension 3.50 metres deep, maximum height 3.70 metres, 2.50 metres high to the eaves.
- Documents
- 6 docs on file
- Reference
- PA/2025/2363
We flagged 2 things worth checking at 23 Sidmouth Avenue
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Signs of HMO activity in the area
- Larger development activity nearby
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Sales history & valuation
23 Sidmouth Avenue valuation sits well clear of the typical sold price in this postcode.
£608,000
Modelled from EPC, postcode comparables.
£585,000
Recorded with HM Land Registry.
Sales timeline
24 March 2023Most recent
£585,000
Median price across the last 5 sales in TW7 4DW: £575,000 (2024–2022).
Nearby sales in TW7 4DW
Everything we know about 23 Sidmouth Avenue, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby
Versus other Sidmouth Avenue homes
23 Sidmouth Avenue is notably below the street on floor area.
Price per m²
£7,597
Street avg £5,833
Floor Area
77 m²
Street avg 97 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.8 t/year
Street avg 4.7 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
West Thames College — bus stop.
Closest school
0.2 km
West Thames College. 47 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
53.7dB
Night-time· 23:00 – 07:00
43.3dB