21 Ash House, Fairfield Avenue, Staines Upon Thames, TW18 4DN
About 21 Ash House
21 Ash House is a one-bedroom property in Staines Upon Thames (TW18 4DN). It has a recorded floor area of 52 m² (around 560 sq ft), construction records dating it to 2012-2021 and council tax band C. The property has underfloor heating on record, all of which lower running costs and tend to lift resale appeal. Other recorded features include a balcony. At 52 m² this is the 19th smallest of 41 units on EPC record in the building, where floor areas span 44–78 m². The building's EPC ratings span D to B across 41 units on file. The latest certificate (July 2025) shows a C (score 73). The rating has held steady at C across 2 certificates since August 2015. Between certificates, wall efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Average.
Last changed hands 10 years ago, in February 2016.
Know exactly what you're buying at 21 Ash House
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
- Bedrooms1
- Bathrooms1
Outside
- ParkingAllocated
- BalconyYes
Building
- Underfloor heatingYes
- LiftYes
- RefurbishedYes
Energy performance
EPC Rating
Planning history
21 Ash House has no planning applications on record.
Notable planning nearby
11applications of note in the surrounding area
We flagged 2 things worth checking at 21 Ash House
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
30-day money-back guarantee
Sales history & valuation
£257,000
Modelled from EPC, postcode comparables.
£250,000
Recorded with HM Land Registry.
Sales timeline
19 February 2016Most recent
£250,000
Median price across the last 5 sales in TW18 4DN: £275,000 (2025–2024).
Nearby sales in TW18 4DN
28 Ash House, Fairfield Avenue, Staines Upon Thames, TW18 4DN
Sold Jun 2025
£275,0009 Ash House, Fairfield Avenue, Staines Upon Thames, TW18 4DN
Sold Feb 2025
£265,00027 Ash House, Fairfield Avenue, Staines Upon Thames, TW18 4DN
Sold Sept 2024
£250,00019 Ash House, Fairfield Avenue, Staines Upon Thames, TW18 4DN
Sold Jul 2024
£340,00017 Ash House, Fairfield Avenue, Staines Upon Thames, TW18 4DN
Sold Apr 2024
£340,000
Everything we know about 21 Ash House, 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 Fairfield Avenue homes
21 Ash House is notably below the street on habitable rooms.
Price per m²
£4,808
Street avg £4,869
Floor Area
52 m²
Street avg 61 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
CO₂ Emissions
1.7 t/year
Street avg 1.5 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
8/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Kingston Road — bus stop.
Closest school
1.0 km
Riverbridge Primary School. 12 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
57.9dB

Night-time· 23:00 – 07:00
49.4dB