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4 bed house for sale Mill Road, Marlow, SL7

Offers in excess of

£2,250,000

Added on 16/09/2026

Type: Detached
Bedrooms: 4
Bathrooms: 3
Size: £962 per sq ft
Tenure: Freehold

Council tax Band H £3,905 a year EPC C 74

Key features

Incredible views of the river
Four double bedrooms
Stunning landscaped gardens
Featured on Grand Designs
Private mooring
Kitchen/Dining/Sitting Room
Four Bedrooms
Three Bath/Shower Rooms
Utility Room
Garden

About this property

Highly individual and beautifully situated contemporary amphibious home with four bedrooms and landscaped gardens, situated on Marlow’s Lock Island with exceptional views of the river.

One of Marlow’s most impressive contemporary homes, in one of the town’s most desirable addresses: Formosa is a truly exceptional house situated on an island within the Thames, accessible only on foot. Designed by Baca Architects, the house is the UK’s first amphibious home and has previously featured on Grand Designs.

Floorplan

Energy performance

C 74

Current

Potential

92+

81-91

69-80

74 C

77 C

55-68

39-54

21-38

1-20

This home is rated band C, scoring 74 out of 100. The average British home is band D. Its certificate says it could reach band C (77) if the improvements it recommends were carried out.

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

Band H £3,905 a year

Per year

Band A

£1,302
Band B

£1,519
Band C

£1,736
Band D

£1,953
Band E

£2,387
Band F

£2,820
Band G

£3,254
Band H

This home: £3,905

This home is in band H, which costs £3,905 a year in Windsor and Maidenhead for 2026/27.

Figures from MHCLG (Open Government Licence v3): the average bill for each band across Windsor and Maidenhead, 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. Check a home's band on GOV.UK.

Price guide

77 comparables · within 2.9 miles

Priced above 96% of the 4-bed houses for sale nearby right now.

This home, £2,250,000 Median £975,000 · £728,000 – £1,899,000

Per square foot

£962 66% over

4-bed houses nearby £581

Against sold prices

61% over

SL7 sold median £596 / sq ft, 509 sales

Compared with 77 4-bed houses for sale within 2.9 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 SL7 over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in SL7 →

Location

Mill Road, Marlow, SL7

Open map Street View

Mortgage and stamp duty

Property price £2,250,000

£1.1m £3.4m

Deposit10% £225,000

£0 £2.3m

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £2,025,000 mortgage. Most lenders would want a household income of about £450,000 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
White Cottage, Lock Island Detached	Detached	Jun 2021	n/a	n/a	n/a	£950,000
The Dacha, Lock Island Detached	Detached	Apr 2020	n/a	n/a	n/a	£485,000
The Wilding, Lock Island Detached	Detached	Jan 2017	n/a	n/a	n/a	£830,000
The Chalet, Lock Island Detached	Detached	Apr 2013	n/a	n/a	n/a	£410,000
Formosa, Lock Island Detached	Detached	Jan 2011	n/a	n/a	n/a	£352,000
Kingfishers, Lock Island Detached	Detached	Aug 2007	n/a	n/a	n/a	£375,000