8 Sidmouth Avenue, Isleworth, TW7 4DW
About 8 Sidmouth Avenue
8 Sidmouth Avenue is a three-bedroom mid-terrace house in Isleworth (TW7 4DW). It has a recorded floor area of 72 m² (around 780 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (March 2012) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 69). The latest certificate is from March 2012, so improvements made since then won't be reflected. Our model identifies extension potential, subject to local planning policy. The home occupies a cul-de-sac position.
2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 2006–2021, sale prices on this property compounded at 5.4% per year. On a £-per-square-foot basis, the last sale (£750/sq ft) was about 70.2% above the typical sold price in the postcode. At 72 m² it's 18.6% smaller than the typical home in the postcode (89 m² median across 25 EPCs). Last sale on file: £585,000 in June 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 8 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
- Bathrooms2
- EnsuiteYes
Outside
- Private gardenRear
- GarageYes
- Cul-de-sacYes
Building
- RefurbishedYes
- Extension potentialPossible
Energy performance
8 Sidmouth Avenue's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 03 Mar 2022
EPC Rating
Planning history
Multiple extension applications run across more than a decade of planning history at 8 Sidmouth Avenue.
- Jan 2026ExtensionOutlineIn report
Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows to the house.
- Documents
- 8 docs on file
- Reference
- P/2025/3413
- Apr 2016ExtensionOutlineIn report
Extension: Single storey · Rear of property
Certificate of lawfulness for erection of a single storey rear extension to the house
- Reference
- P/2016/0699
We flagged 2 things worth checking at 8 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
8 Sidmouth Avenue has more than doubled in price since the earliest registered sale in 2006.
£612,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.4% per year over 15 years.
£585,000
Growth on file: 5.4% per year over 15 years.
Sales timeline
28 June 2021Most recent
£585,000
+125.0%over 15 years10 March 2006
£260,000
Median price across the last 5 sales in TW7 4DW: £575,000 (2024–2022).
Nearby sales in TW7 4DW
Everything we know about 8 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
8 Sidmouth Avenue is notably below the street on floor area.
Price per m²
£8,078
Street avg £5,810
Floor Area
72 m²
Street avg 97 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
2.9 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