21a, Pownall Road, Hounslow, TW3 1YN
About 21a
21a is a semi-detached house in Hounslow (TW3 1YN). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (March 2023) shows a D (score 58), a step below the typical UK home. The rating has held steady at D across 2 certificates since December 2012. Between certificates, lighting went from Average to Very Good. The recommended improvements would push it to C (score 78). At 92 m² this is the 19th smallest of 31 units on EPC record in the building, where floor areas span 12–210 m². The building's EPC ratings span E to B across 31 units on file.
Know exactly what you're buying at 21a
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
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
More low energy lighting installed
Planning history
21a has no planning applications on record.
Notable planning nearby
23applications of note in the surrounding area
We flagged 2 things worth checking at 21a
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
21a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£385,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in TW3 1YN: £350,000 (2023–2022).
Nearby sales in TW3 1YN
Everything we know about 21a, 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 Pownall Road homes
21a outperforms the street on habitable rooms by a wide margin.
EPC Rating
58 (D)
Street avg 67 (D)
Floor Area
92 m²
Street avg 54 m²
CO₂ Emissions
4.6 t/year
Street avg 2.4 t/year
Habitable Rooms
5 rooms
Street avg 3 rooms
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
16/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Pownall Gardens — bus stop.
Closest school
0.5 km
Chatsworth Primary School. 55 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
55.0dB

Night-time· 23:00 – 07:00
45.1dB