1/5

1 bed flat for sale Porter Street, Marylebone, W1U

Asking price

£500,000

Added on 14/09/2026

Type: Flat
Bedrooms: 1
Bathrooms: 1
Size: £984 per sq ft
Tenure: Leasehold; 161 years left(from the agent's description)

EPC G 13 potential D

* From the agent's description. Check it with them before you rely on it.

Highlights

From the agent's description

Balcony
Top floor
Porter
161 years left on the lease

About this property

A one bedroom top floor apartment with three balconies located in a red brick mansion block off Baker Street. Benefits a long lease, 24 hour CCTV security and on site porters. Located a short distance from the transport hub of Baker Street Station, Marylebone High Street and Regents Park.

Tenure: Leasehold
Lease Years Remaining: 161

Floorplan

Energy performance

G 13

Current

Potential

92+

81-91

69-80

55-68

68 D

39-54

21-38

1-20

13 G

This home is rated band G, scoring 13 out of 100. The average British home is band D. Its certificate says it could reach band D (68) 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

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.

Price guide

100 comparables · within 0.6 miles

Cheaper than 62% of the 1-bed flats for sale nearby right now.

This home, £500,000 Median £595,000 · £400,000 – £1,691,500

Per square foot

£984 8% under

1-bed flats nearby £1,075

Against sold prices

38% under

W1U sold median £1,579 / sq ft, 134 sales

Compared with 100 1-bed flats for sale within 0.6 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 W1U over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in W1U →

Location

Porter Street, Marylebone, W1U

Open map Street View

Mortgage and stamp duty

Property price £500,000

£250k £750k

Deposit10% £50,000

£0 £500k

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £450,000 mortgage. Most lenders would want a household income of about £100,000 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
Flat 8c, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	May 2025	n/a	n/a	n/a	£2,400,000
Flat 8g, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	Sept 2024	n/a	n/a	n/a	£800,000
Flat 8g, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	Jun 2013	n/a	n/a	n/a	£599,000
Flat 8f, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	Mar 2012	581 sq ft £1,290/sq ft	581 sq ft	£1,290	£750,000
Flat 8c, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	Aug 2010	n/a	n/a	n/a	£1,566,500
Flat 8f, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	Dec 2006	581 sq ft £860/sq ft	581 sq ft	£860	£499,950
Flat 8g, Portman Mansions, Porter Street Flat / maisonette · new build	Flat / maisonette · new build	Jan 2006	n/a	n/a	n/a	£310,000
Flat 8c, Portman Mansions, Porter Street Flat / maisonette	Flat / maisonette	Jul 2003	n/a	n/a	n/a	£850,000