20 Castle Mews, St Thomas Street, Oxford, OX1 1JR
About 20 Castle Mews
20 Castle Mews is a semi-detached house in Oxford (OX1 1JR). It has a recorded floor area of 56 m² (around 603 sq ft) and construction records dating it to 1996-2002. The latest certificate (April 2019) shows a C (score 73). The rating has held steady at C across 2 certificates since May 2009. Between certificates, lighting went from Poor to Very Good. Main heating runs on electricity. At 56 m² this is the 10th smallest of 27 units on EPC record in the building, where floor areas span 45–86 m². The building's EPC ratings span E to B across 27 units on file.
Today's modelled estimate of £339,000 is 11.9% below the 2022 sale of £385,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£639/sq ft) was about 54.7% above the typical sold price in the postcode. Most recent transfer: September 2022 at £385,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Everything you need to know about 20 Castle Mews
The true value, the hidden risks and the full sale history, in one report.
30-day money-back guarantee
The data behind every report
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Planning history
20 Castle Mews has no planning applications on record.
Notable planning nearby
10applications of note in the surrounding area
We flagged 2 things worth checking at 20 Castle Mews
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
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£339,000
Modelled from EPC, postcode comparables.
£385,000
Recorded with HM Land Registry.
Sales timeline
8 September 2022Most recent
£385,000
Median price across the last 5 sales in OX1 1JR: £380,000 (2025–2022).
Nearby sales in OX1 1JR
9 Castle Mews, St Thomas Street, Oxford, OX1 1JR
Sold Aug 2025
£380,00018 Castle Mews, St Thomas Street, Oxford, OX1 1JR
Sold Mar 2025
£391,00016 Castle Mews, St Thomas Street, Oxford, OX1 1JR
Sold Sept 2023
£440,00021 Castle Mews, St Thomas Street, Oxford, OX1 1JR
Sold Jul 2023
£375,00026 Castle Mews, St Thomas Street, Oxford, OX1 1JR
Sold Jan 2022
£380,000
Versus other St Thomas Street homes
20 Castle Mews is notably below the street on years held.
Price per m²
£6,875
Street avg £6,214
Floor Area
56 m²
Street avg 60 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
2.8 t/year
Street avg 2.9 t/year
Everything you need to know about 20 Castle Mews
The true value, the hidden risks and the full sale history, in one report.
30-day money-back guarantee
The data behind every report
Similar properties nearby
1 Preachers Lane
OX1 1RS
1 Brooks Taylor Court, Albion Place
OX1 1UB
1 Venneit Close
OX1 1HZ
1 Swan Court, Paradise Street
OX1 1JB
1 Castle Mews, St Thomas Street
OX1 1JR
10 Bridges Cross, Speedwell Street
OX1 1EZ
1 Faulkner Street
OX1 1UA
1 Abbey Walk, Osney Lane
OX1 1NN
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Park End Street — bus stop.
Closest school
0.3 km
Activate Learning. 17 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
52.5dB
Night-time· 23:00 – 07:00
43.5dB