73b Castelnau
SW13 9RT
- Detached
- 3 bedrooms (estimate)
- 2,820 sq ft
- EPC D
What comparable sales show
Few close matches: a rough guide£4,112,000
Range £3,125,000 to £5,098,000 · £1,458 per sq ft
Rank in SW13 9RT
10th of 22
Postcode average £3,465,682
From completed sales of similar homes nearby, adjusted for floor area. It cannot see condition, layout or recent work, so it is not a valuation.
In short
73b Castelnau is a 3 bedroom detached in SW13 of about 2,820 sq ft.
Comparable completed sales nearby put it at £3,125,000 to £5,098,000, about £4,112,000 in the middle.
That makes it the 10th highest of the 22 homes we can compare in SW13 9RT, where the middle figure averages £3,465,682.
Across Richmond upon Thames, average prices were unchanged in the year to August 2026.
Where in the range would yours sell?
Condition and improvements usually decide it, and only someone who sees the home can say.
Lower end
£3,125,000
Middle
£4,112,000
Upper end
£5,098,000
Done work since the records were made? Claim your home and tell us, or ask local agents where yours sits.
The street
Castelnau and its sales
73b Castelnau on the map
This home, the completed sales its figure is worked out from, and the other sales on Castelnau. Choose a pin for the address, size and date.
The Land Registry records a sale by its postcode, so pins sit at the postcode, close to the home, not on its doorstep. Map: contains OS data © Crown copyright and database rights 2026.
How 73b Castelnau compares with Castelnau
Against the 31 completed sales on the street in the last two years
Price
Size
Per sq ft
- Its middle figure of £4,112,000 is 320% above the street's median sale price of £980,000.
- At 2,820 sq ft it is 130% above the median size of the homes sold here, 1,227 sq ft.
- That is £1,458 per sq ft, 65% above the street's median of £886 per sq ft.
- 23 of those 31 sales completed for less than this home's middle figure, and 8 for the same or more.
A comparison of completed sales, not a valuation: it cannot see condition, layout or work done since a home last sold.
Sales activity on Castelnau
Completed sales registered with HM Land Registry, by quarter
- Sales in two years
- 31
- Average price
- £2,614,694
- Lowest
- £25,000
- Highest
- £10,000,000
| Quarter | Sales | Median price |
|---|---|---|
| Q1 2025 | 5 | £990,000 |
| Q2 2025 | 2 | £4,795,000 |
| Q3 2025 | 5 | £955,000 |
| Q4 2025 | 6 | £1,747,500 |
| Q1 2026 | 2 | £448,250 |
| Q2 2026 | 3 | £980,000 |
| Q3 2026 | 2 | £2,895,000 |
| Q4 2026 | 0 | – |
| Type of home | Share of sales | Median price | Per sq ft |
|---|---|---|---|
| Flats | 59% (17) | £635,000 | £798 |
| Detached houses | 24% (7) | £7,800,000 | £1,583 |
| Terraced houses | 10% (3) | £1,850,000 | £885 |
| Semi-detached houses | 7% (2) | £5,775,000 | £1,336 |
Completed sales on Castelnau
Every sale in the last two years. Choose an address to see that home's page.
| Address | Sold | Price | Type | Size | Per sq ft |
|---|---|---|---|---|---|
| Flat 39, Castelnau Mansions CastelnauSW13 9QU | Aug 2026 | £990,000 | Flat | 1,076 sq ft | £920 |
| 31 CastelnauSW13 9RS | Jul 2026 | £4,800,000 | Semi-detached | 2,874 sq ft | £1,670 |
| Flat 1, 75 CastelnauSW13 9RT | Jun 2026 | £442,500 | Flat | 732 sq ft | £605 |
| 102A CastelnauSW13 9EU | May 2026 | £1,850,000 | Terraced | 2,809 sq ft | £659 |
| Flat 37, Castelnau Mansions CastelnauSW13 9QU | Apr 2026 | £980,000 | Flat | 1,227 sq ft | £799 |
| Flat 1, 8 CastelnauSW13 9RU | Mar 2026 | £471,500 | Flat | 592 sq ft | £796 |
| Flat 3, Castlenau Court, 180 CastelnauSW13 9DH | Jan 2026 | £425,000 | Flat | – | – |
| Flat 7, Fairbairn Lodge, 6 CastelnauSW13 9RU | Dec 2025 | £478,000 | Flat | – | – |
| Flat 4, 8 CastelnauSW13 9RU | Dec 2025 | £635,000 | Flat | 829 sq ft | £766 |
| 164 CastelnauSW13 9DH | Nov 2025 | £2,000,000 | Terraced | 2,260 sq ft | £885 |
| 109 CastelnauSW13 9EL | Nov 2025 | £5,950,000 | Detached | 5,210 sq ft | £1,142 |
| 41 CastelnauSW13 9RS | Oct 2025 | £6,750,000 | Semi-detached | 6,738 sq ft | £1,002 |
| 183 CastelnauSW13 9ER | Oct 2025 | £1,495,000 | Terraced | 1,604 sq ft | £932 |
| 24 CastelnauSW13 9RU | Sept 2025 | £10,000,000 | Detached | 6,318 sq ft | £1,583 |
| Flat 11, Castelnau Mansions CastelnauSW13 9QX | Sept 2025 | £955,000 | Flat | 1,184 sq ft | £807 |
| Flat 13, 14 CastelnauSW13 9RU | Sept 2025 | £375,000 | Flat | 420 sq ft | £893 |
| Flat 4, 172 CastelnauSW13 9DH | Sept 2025 | £223,500 | Flat | 291 sq ft | £769 |
| 29 CastelnauSW13 9RS | Aug 2025 | £8,100,000 | Detached | – | – |
| 50 CastelnauSW13 9EX | Jun 2025 | £9,200,000 | Detached | 5,339 sq ft | £1,723 |
| Flat C, 86 CastelnauSW13 9EU | May 2025 | £390,000 | Flat | 549 sq ft | £710 |
| Flat 35, Castelnau Mansions CastelnauSW13 9QU | Mar 2025 | £955,000 | Flat | 1,184 sq ft | £807 |
| 60 CastelnauSW13 9EX | Mar 2025 | £6,500,000 | Detached | 3,735 sq ft | £1,740 |
| Ground Floor Flat, 86 CastelnauSW13 9EU | Mar 2025 | £675,000 | Flat | – | – |
| Flat 16, Castelnau Mansions CastelnauSW13 9QX | Mar 2025 | £990,000 | Flat | 1,055 sq ft | £939 |
| 130 CastelnauSW13 9ET | Feb 2025 | £3,940,000 | Detached | – | – |
| 174 CastelnauSW13 9DH | Dec 2024 | £25,000 | Other | – | – |
| Coach House, 89 CastelnauSW13 9EL | Dec 2024 | £1,335,000 | Other | 1,507 sq ft | £886 |
| 71 CastelnauSW13 9RT | Dec 2024 | £7,800,000 | Detached | 5,081 sq ft | £1,535 |
| Flat 41, Castelnau Mansions CastelnauSW13 9QU | Nov 2024 | £915,000 | Flat | 1,550 sq ft | £590 |
| Flat 37, Castelnau Mansions CastelnauSW13 9QU | Nov 2024 | £970,000 | Flat | 1,227 sq ft | £790 |
| Flat 11, 14 CastelnauSW13 9RU | Nov 2024 | £440,000 | Flat | 420 sq ft | £1,048 |
Energy
How efficient the home is
Energy performance certificate
From the official register for 73b Castelnau, lodged 9 October 2026.
Rating now
D65 points
Could reach
D68 points
3 points higher with the improvements below
- Built
- 1950–1966
- Solar panels
- None recorded
What the assessor found
Each part of the home, with the certificate's own energy efficiency rating.
Walls
Cavity wall, as built, insulated (assumed)
Very goodRoof
Pitched, insulated
Very goodFloor
Suspended, insulated
Not rated on the certificate
Windows
High performance glazing
GoodHeating
Air source heat pump, underfloor, electric
AverageHeating controls
Time and temperature zone control
Very goodHot water
From main system
AverageLighting
Good lighting efficiency
Good
Estimated running costs
A year, now and after the recommended improvements.
Heating
Hot water
Lighting
The assessor's estimates at the energy prices in use when the certificate was made (2026), for a typical household. Today's bills will differ.
Improvements the certificate recommends
In the certificate's order. Each rating assumes the steps before it are done.
- 1
Solar photovoltaic panels, 2.5 kWp
Typical cost £8,000–£10,000 · saves about £293 a year
Rating after68D
Costs and savings are the certificate's own, as estimated when it was made.
History
What it has sold for
Sale history
Every sale of this home registered with HM Land Registry since 1995
No sale of this home has been registered since 1995.
Nearby
Neighbours and the sales behind the figure
Homes in SW13 9RT
Ranked by what comparable sales show. Choose one to see its page.
The completed sales behind the figure
Similar homes nearby, registered with HM Land Registry. Choose one to see its page.
| Home | Price | Sold | Size | Per sq ft | Away |
|---|---|---|---|---|---|
| 38 Suffolk RoadSW13 9NL · Detached | £3,900,000 | Sept 2025 | 3,003 sq ft | £1,299 | 0.3 mi |
| 60 CastelnauSW13 9EX · Detached | £6,500,000 | Mar 2025 | 3,735 sq ft | £1,740 | < 0.1 mi |
| 60 Nassau RoadSW13 9QE · Detached | £3,900,000 | Nov 2025 | 2,562 sq ft | £1,522 | 0.5 mi |
| 76 Gerard RoadSW13 9QQ · Detached | £3,400,000 | Aug 2025 | 3,229 sq ft | £1,053 | 0.5 mi |
| Glenburn Cardigan RoadSW13 0BH · Detached | £2,925,000 | Jul 2025 | 2,519 sq ft | £1,161 | 0.5 mi |
| 71 CastelnauSW13 9RT · Detached | £7,800,000 | Dec 2024 | 5,081 sq ft | £1,535 | < 0.1 mi |
| 50 CastelnauSW13 9EX · Detached | £9,200,000 | Jun 2025 | 5,339 sq ft | £1,723 | < 0.1 mi |
| 109 CastelnauSW13 9EL · Detached | £5,950,000 | Nov 2025 | 5,210 sq ft | £1,142 | 0.2 mi |
| 24 CastelnauSW13 9RU · Detached | £10,000,000 | Sept 2025 | 6,318 sq ft | £1,583 | 0.2 mi |
| 97A Lonsdale RoadSW13 9DA · Detached | £1,500,000 | Mar 2026 | 1,389 sq ft | £1,080 | 0.4 mi |
| 22 Woodlands RoadSW13 0JZ · Detached | £4,950,000 | Jul 2025 | 4,349 sq ft | £1,138 | 1 mi |
| 72 Fulham Park GardensSW6 4LQ · Detached | £2,915,000 | May 2025 | 2,325 sq ft | £1,254 | 1.4 mi |
The area
SW13 at a glance
What buyers have paid in SW13
Completed sales in the last 12 months, against the 12 months before
Flats
Terraced
Semi-detached
Detached
| Type | Sales | Average price | Average size | Per sq ft | On the year |
|---|---|---|---|---|---|
| All homes | 145 | £1,394,306 | 1,493 sq ft | £962 | −7.0% |
| Flats | 40 | £628,930 | 811 sq ft | £762 | −7.7% |
| Terraced | 69 | £1,398,631 | 1,502 sq ft | £981 | −3.2% |
| Semi-detached | 29 | £2,331,093 | 2,101 sq ft | £1,134 | +4.1% |
| Detached | 4 | £2,985,000 | 3,053 sq ft | £1,248 | −38.1% |
Find another home
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Contains HM Land Registry data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
Energy performance data © Crown copyright. Licensed under the Open Government Licence v3.0.
Floor area and energy rating from the energy certificate of September 2026.
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