14 Sidmouth Avenue, Isleworth, TW7 4DW
About 14 Sidmouth Avenue
14 Sidmouth Avenue is an end-of-terrace house in Isleworth (TW7 4DW). It has a recorded floor area of 89 m² (around 958 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (September 2013) shows a D (score 55), a step below the typical UK home. The recommended improvements would push it to C (score 80). The latest certificate is from September 2013, so improvements made since then won't be reflected.
One planning record on file: a loft conversion approved in 2021. Past consents include a loft conversion, meaningful when judging how the property has evolved. Last changed hands 12 years ago, in January 2014. Across 2001–2014, sale prices on this property compounded at 6.3% per year. Today's modelled estimate of £571,000 is 42.8% above the 2014 sale price.
Know exactly what you're buying at 14 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
Energy performance
14 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This certificate is over 10 years old and is no longer valid.Expired 24 Sept 2023
EPC Rating
Planning history
- Jul 2021Loft ConversionOutlineIn report
Certificate of Lawfulness for proposed erection of a rear roof extension incorporating hip to gable conversion and two front roof windows; Alterations to the existing ground floor rear extension comprising of the removal of the existing opens and installation of one new window and French doors to the house
- Documents
- 5 docs on file
- Reference
- P/2021/2208
We flagged 2 things worth checking at 14 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
Sale price has at least doubled since 2001.
£571,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.3% per year over 12 years.
£400,000
Growth on file: 6.3% per year over 12 years.
Sales timeline
20 January 2014Most recent
£400,000
+112.8%over 12 years2 September 2001
£188,000
Median price across the last 5 sales in TW7 4DW: £575,000 (2024–2022).
Nearby sales in TW7 4DW
Everything we know about 14 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
14 Sidmouth Avenue outperforms the street on years held by a wide margin.
Price per m²
£4,494
Street avg £5,980
Floor Area
89 m²
Street avg 97 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
4.8 t/year
Street avg 4.6 t/year
Similar properties nearby
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