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23 Castle Mews, St Thomas Street, Oxford, OX1 1JR

EPC B3 sales on record1 planning record

Estimated value

£438,000

  • Since the 2014 sale (£395,000)+11%
  • Against OX1 1JR's recent median (£391,000)+12%

Newest record on this page: November 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Semi-detached
Floor 1st
Bedrooms
2
Floor area
58 m²
624 sq ft
Energy rating
B
Score 81
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£438,000

  • Against its 2014 sale (£395,000)+11%
  • Against OX1 1JR's recent median (£391,000)+12%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 23 Castle Mews is modelled from its 58 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in OX1 1JR. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    58 m² from the EPC lodged in April 2014

  • Sales of this home

    3 sales recorded, the latest in 2014

  • Recent sales in OX1 1JR

    5 sales, median £391,000 (2025–2023)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: November 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
Planning1 applicationFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

23 Castle Mews has more than tripled in price since its earliest registered sale in 1997.

Sales timeline

  1. 30 July 2014Most recent

    £395,000

    +46.3%over 6 years

  2. 10 April 2008

    £270,000

    +163.4%over 11 years

  3. 13 February 1997

    £102,500

Median price across the last 5 sales in OX1 1JR: £391,000 (2025–2023).

Risks

What this page doesn't show

2 potential issues have already been flagged for 23 Castle Mews, St Thomas Street, Oxford, OX1 1JR. The detail, evidence and what to ask about it are in the Risks Report.
  • Signs of HMO activity in the areaIn report
  • Larger development activity nearbyIn report
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

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Overview

About 23 Castle Mews

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

23 Castle Mews is a two-bedroom semi-detached house in Oxford (OX1 1JR). It has a recorded floor area of 58 m² (around 624 sq ft) and construction records dating it to 1996-2002. The latest certificate (April 2014) returns a B (score 81), comfortably above the UK average. Main heating runs on electricity. The latest certificate is from April 2014, so improvements made since then won't be reflected. At 58 m² this is the 13th 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, with this unit at the top. On EPC score it ranks first in the building (81 versus a worst of 48).

On energy efficiency it sits in the top 10% of properties in this postcode. Across 1997–2014, sale prices on this property compounded at 8% per year. Today's modelled estimate of £438,000 is 10.9% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£633/sq ft) was about 50.4% above the typical sold price in the postcode. On the market in July 2014 and unlisted since — roughly 12 years. One historical planning record sits against the property in 2022.

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

  • Bedrooms2

Outside

  • ParkingOff street

Building

  • Central heatingYes
  • RefurbishedYes
Before you decide

Everything you need to know about 23 Castle Mews

The true value, the hidden risks and the full sale history, in one report.

Signs of HMO activity in the areaLarger development activity nearby

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

23 Castle Mews ranks among the most efficient homes in the postcode for energy use.

EPC Expired

This certificate is over 10 years old and is no longer valid.Expired 07 Apr 2024

Current Certificate
Apr 2014

EPC Rating

A
B
B81
C
D
E
F
G
Main Heating
Electric
Main Fuel
Electric
Hot Water
Average
Windows
Good
CO2 Emissions
2.2 t/year
Occupancy
Owner Occupied

Certificate validity

Expired on 7 April 2024

New assessment needed to sell or let
Planning

Planning history

Applications and permits filed against 23 Castle Mews, St Thomas Street, Oxford, OX1 1JR, sourced from the PlanIt planning register.

1 application on record at 23 Castle Mews, St Thomas Street, Oxford, OX1 1JR

1decisions7documents10nearby
  1. Nov 2022
    Outline
    Outcome in report

    Application to certify that the proposed alteration to fenestration is lawful development.

    Documents
    7 docs on file
    Reference
    22/02214/CPU
    Full record in report

Unlock 23 Castle Mews, St Thomas Street, Oxford, OX1 1JR's full planning history

You're seeing the shape of it. The report has the substance.

  • Every decision — granted, refused or withdrawn (1 on record)
  • All 1 application on this property in full, plus 10 notable nearby
  • The 7 documents, officer reports & conditions
  • What the pattern means for extending or converting here
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On the street

Versus other St Thomas Street homes

Four headline reads against 26 similar flats on this street, drawn from the latest EPC and Land Registry data.

On epc rating, 23 Castle Mews stands well clear of the street.

Price per m²

£6,810

Street avg £6,256

Above

Floor Area

58 m²

Street avg 60 m²

On par

Habitable Rooms

3 rooms

Street avg 3 rooms

On par

CO₂ Emissions

2.2 t/year

Street avg 2.9 t/year

Strongly above
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Oxford district page.
Full Oxford report

Rail-style transport is unusually close for this postcode.

Crime

286/mo

Steady 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.

Nearest schools

  • Activate Learning16 plus297m
  • West Oxford Community Primary SchoolPrimary645m
  • St Barnabas' Church of England Aided Primary SchoolPrimary822m
  • St Ebbe's Church of England Aided Primary SchoolPrimary874m

Nearest stops

  • Park End StreetBus stop123m
  • Frideswide SquareBus stop158m
  • New RoadBus stop253m
  • Oxford Rail StationRailway station276m

Most reported crime locally

  • Violence & Sexual Offences1,485 reports31%
  • Shoplifting727 reports15%
  • Other Theft483 reports10%
  • Public Order459 reports9%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around OX1 1JR from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for OX1 1JR

Daytime· 07:00 – 23:00

52.5dB

Low
Night-time road noise heatmap for OX1 1JR

Night-time· 23:00 – 07:00

43.5dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 3 Building Survey

Late 20th century1st Floor FlatEPC BNo mains gas

Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.

From £1,020 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£428k

1 Tidmarsh Lane

OX1 1AZ

2 bed2 bath
£450k

1 Rowland Hill Court, Osney Lane

OX1 1LE

2 bed2 bath
£394k

1 Castle Mews, St Thomas Street

OX1 1JR

2 bed1 bath
£375k

1 Venneit Close

OX1 1HZ

3 bed2 bath
£715k

1 Dale Close

OX1 1TU

3 bed2 bath
£240k

1 Abbey Walk, Osney Lane

OX1 1NN

1 bed1 bath
£729k

1 Shirelake Close

OX1 1SN

4 bed
£433k

1 Blackfriars Road

OX1 1RP

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 23 Castle Mews is modelled from its 58 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in OX1 1JR. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 3 sales are recorded for 23 Castle Mews. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 23 Castle Mews was lodged in April 2014 at band B and expired in April 2024, so a new one is needed to sell or let. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. 1 application is matched to 23 Castle Mews. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 17 months, which places each incident at an approximate point. The 17 schools and 30 stops listed are measured in a straight line from OX1 1JR, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 23 Castle Mews, St Thomas Street, Oxford, OX1 1JR. Each answer is also embedded as structured data for search engines.

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