House Price Finder
Home›SW1X›1, APARTMENT 9, WILLIAM STREET

1, APARTMENT 9, WILLIAM STREET

SW1X 9HLKnightsbridge & Belgravia
£2,550,000↓ 83%
Flat · Leasehold · sold 30-09-2025
FlatEPC C90.0 m²20213 sales
Schools
5 nearby
Nearest 0.4 mi
Safety Index
0
High Risk
EPC Rating
Band C
Score 71/100
Broadband
100%
Gigabit available

Sale History

3
Latest Transaction
30-09-2025
Flat · Leasehold
£2,550,000
Previous Sale
12-03-2024
Flat · Leasehold
£2,650,000
Initial Purchase
29-09-2023
Flat · Leasehold
£15,200,000

EPC Energy Rating

C
Score 71/100
Certified 27-04-2022
A
A
B
B
C
C
D
D
E
E
F
F
G
G
Floor Area
90.0 m²
Type
Flat
Built
2021
Walls
Average thermal transmittance 0.29 W/m-¦K
Roof
(other premises above)
Heating
Community scheme
Price / m²
£28,333
Price / ft²
£2,632
SW1X 9HL · Knightsbridge & Belgravia

Key Facts

Last sold£2,550,000
Date30-09-2025
TypeFlat
Floor area90.0 m²
EPCC
Total sales3

Stamp Duty

Standard£217,250
First-time buyer£217,250
Additional property£344,750
Full calculator →

Mortgage Estimate

Monthly payment
£11,339
Local Education Hub
Top performing schools nearby
School NameOfsted RatingTypeDistance
Holy Trinity CofE Primary School
GoodPrimary0.6 mi
More House School
Not ratedNot applicable0.4 mi
Hill House School
Not ratedNot applicable0.4 mi
Knightsbridge School
Not ratedNot applicable0.4 mi
Sussex House School
Not ratedNot applicable0.6 mi
Crime Statistics
1767 incidents/month · Data from police.uk
Theft From The Person397
Shoplifting283
Other Theft278
Violent Crime228
Anti Social Behaviour217
Vehicle Crime101
Public Order82
Drugs66
Internet & Broadband
Ofcom Connected Nations 2025
Gigabit (1Gbps+)100%
Ultrafast (100Mbps+)100%
Superfast (30Mbps+)100%
BTSkyVirgin MediaTalkTalkVodafoneEEHyperopticCommunity Fibre

Nearby Sales

2
AddressDateTypePrice
1, APARTMENT 7, WILLIAM STREET12-03-2024Flat£2,650,000
1, APARTMENT 4, WILLIAM STREET29-09-2023Flat£15,200,000