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2 bed flat for sale One Casson Square, London, SE1

Asking price

£1,100,000

Reduced on 13/10/2026

Type: Flat
Bedrooms: 2
Bathrooms: 2
Size: £1,134 per sq ft
Tenure: Ask agent

EPC B 86

Key features

Stunning two bedroom apartment
970 sq ft (90.11 sqm)
Private balcony
Residents' health club and restorative spa
Exclusive residents' lounge and private dining area
24 hour concierge

About this property

This elegantly designed two bedroom apartment, located in an excellent position, is available for chain free sale through Prime London in One Casson Square, Southbank Place. The apartment offers 970 sq ft (90.11 sqm) of internal space, and benefits from having excellent finishes throughout and a private balcony.

Apartment interiors blend traditional and modern approaches with combinations of high quality natural materials creating a harmonious and durable feel. Bespoke designed kitchens with carefully selected finishes and high quality integrated Miele appliances. The apartment also benefits from having a luxurious bathroom finished with polished stone throughout and high specification fittings and Dornbracht brassware.

Floorplan

Energy performance

B 86

Current

Potential

92+

81-91

86 B

69-80

55-68

39-54

21-38

1-20

This home is rated band B, scoring 86 out of 100. The average British home is band D.

Read from the certificate published with this listing, so it may not be the latest one. Check the government EPC register for the full certificate and its recommendations.

Council tax

Ask agent

Per year

Band A

£700
Band B

£816
Band C

£933
Band D

£1,050
Band E

£1,283
Band F

£1,516
Band G

£1,749
Band H

£2,099

The agent hasn't said which band this home is in; you can look it up on GOV.UK. In Westminster, 2026/27 bills run from £700 a year in band A to £2,099 in band H.

Figures from MHCLG (Open Government Licence v3): the average bill for each band across Westminster, including the typical parish precept, so a parish's own bill can differ a little. Discounts lower the bill, such as 25% off for an adult living alone.

Property timeline

Reduced

October 2026 £1,100,000

Was £1,125,000
Listed

September 2026 £1,125,000

2 beds · 2 baths · this listing

Past sales can't be shown: the agent hasn't given the flat number.

Price guide

100 comparables · within 0.7 miles

Priced above 55% of the 2-bed flats for sale nearby right now.

This home, £1,100,000 Median £900,000 · £598,000 – £2,205,000

Per square foot

£1,134 2% over

2-bed flats nearby £1,107

Against sold prices

38% over

SE1 sold median £820 / sq ft, 1,276 sales

Compared with 100 2-bed flats for sale within 0.7 miles, on the market now or already under offer. The range is the middle 80% of their asking prices. Sold prices are HM Land Registry sales in SE1 over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in SE1 →

Location

One Casson Square, London, SE1

Open map Street View

Mortgage and stamp duty

Property price £1,100,000

£550k £1.7m

Deposit10% £110,000

£0 £1.1m

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £990,000 mortgage. Most lenders would want a household income of about £220,000 to support it.

A guide only, for a capital repayment mortgage. The rate you are offered and what you can borrow depend on your circumstances and a full application with a lender or broker. Your home may be repossessed if you do not keep up repayments on your mortgage.

Properties sold nearby

HM Land Registry sales nearby. Floor areas from Energy Performance Certificates where matched.

Address	Type	Sold	Size	Size	£/sq ft	Price
401, 1, Casson Square Flat / maisonette	Flat / maisonette	Feb 2023	366 sq ft £1,735/sq ft	366 sq ft	£1,735	£635,000
1205, 1, Casson Square Flat / maisonette	Flat / maisonette	Dec 2022	1,012 sq ft £1,606/sq ft	1,012 sq ft	£1,606	£1,625,000
1105, 1, Casson Square Flat / maisonette	Flat / maisonette	Apr 2022	1,012 sq ft £1,482/sq ft	1,012 sq ft	£1,482	£1,500,000
1308, 1, Casson Square Flat / maisonette · new build	Flat / maisonette · new build	Mar 2022	388 sq ft £1,935/sq ft	388 sq ft	£1,935	£750,000
1007, 1, Casson Square Flat / maisonette · new build	Flat / maisonette · new build	Jan 2022	657 sq ft £1,448/sq ft	657 sq ft	£1,448	£950,600
408, 1, Casson Square Flat / maisonette · new build	Flat / maisonette · new build	Dec 2021	388 sq ft £1,497/sq ft	388 sq ft	£1,497	£580,000
Apartment 3203, 1, Casson Square Flat / maisonette · new build	Flat / maisonette · new build	Dec 2021	1,033 sq ft £2,153/sq ft	1,033 sq ft	£2,153	£2,225,000
1201, 1, Casson Square Flat / maisonette · new build	Flat / maisonette · new build	Dec 2021	366 sq ft £1,794/sq ft	366 sq ft	£1,794	£656,600