21 Castlegate, Richmond, TW9 2HL
About 21 Castlegate
21 Castlegate is a four-bedroom end-of-terrace house in Richmond (TW9 2HL). It has a recorded floor area of 150 m² (around 1615 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (January 2025) shows a C (score 69), just inside the C band. When first surveyed in April 2009 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 83).
It hasn't traded since January 2010, a hold of 17 years that's notably long for the area. On energy efficiency it sits in the top 10% of properties in this postcode. Across 1998–2010, sale prices on this property compounded at 7.6% per year. Today's modelled estimate of £1,281,000 sits 126.7% above the 2010 sale of £565,000. On a £-per-square-foot basis, the last sale (£350/sq ft) was about 36.6% below the postcode norm. 4 planning records sit against the property, 0 approved, 0 refused.
What this property has
Inside
- Bedrooms4
- Bathrooms2
Outside
- Private gardenRear
Building
- RefurbishedYes
Energy performance
21 Castlegate ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Certificate validity
Valid until 22 January 2035
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Roof insulation improved
More low energy lighting installed
Heating controls upgraded for better temperature management
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £1,645 · Includes VAT
Planning history
21 Castlegate has 2 separate extension applications on the council record.
4 applications on record at 21 Castlegate, Richmond, TW9 2HL
- Jul 2007ExtensionFullOutcome in report
Extension: Single storey · Rear of property
Single storey rear extension and roof extension.
- Documents
- 7 docs on file
- Reference
- 07/1956/HOT
- More recent applications — locked
- ExtensionAug 2016Decision
- ExtensionAug 2016Decision
+ 1 more application in the report
Unlock 21 Castlegate, Richmond, TW9 2HL's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn
- All 4 applications on this property in full, plus 1 notable nearby
- The 51 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
21 Castlegate has more than doubled in price since the earliest registered sale in 1998.
£1,281,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.6% per year over 11 years.
£565,000
Growth on file: 7.6% per year over 11 years.
Sales timeline
5 January 2010Most recent
£565,000
+18.9%over 3 years13 August 2006
£475,000
+91.1%over 7 years27 September 1998
£248,500
Median price across the last 5 sales in TW9 2HL: £1,002,500 (2025–2017).
Versus other Castlegate homes
Price per m² for 21 Castlegate lags the street by a wide margin.
Price per m²
£3,767
Street avg £7,991
Floor Area
150 m²
Street avg 132 m²
Habitable Rooms
6 rooms
Street avg 6 rooms
CO₂ Emissions
4.7 t/year
Street avg 6.6 t/year
Similar properties nearby
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
225/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Manor Circus — bus stop.
Closest school
0.5 km
Darell Primary and Nursery School. 39 schools nearby.
Go deeper on the local area
A Local Area 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
45.1dB







