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Get started4 Mary Street is a three-bedroom mid-terrace house in Islington, London, London (N1 7DL). It has a recorded floor area of 131 m² (around 1410 sq ft), construction records dating it to before 1900 and council tax band F. Tenure is freehold. The latest certificate (October 2025) shows a C (score 70). When first surveyed in May 2014 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, roof efficiency went from Poor to Average and window efficiency went from Very Poor to Average. Period features are noted in the property record. Records show the property has been extended at some point in its history.
3 planning records sit against the property, 2 approved, 0 refused, 1 pending. Past consents include new windows and an extension, meaningful when judging how the property has evolved. An active application for tree works is awaiting a decision. Sale prices here have outpaced London HPI: 7.5% per year against 0% for the wider region. Today's modelled estimate of £1,837,000 is 35.2% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£964/sq ft) was about 16.6% above the typical sold price in the postcode. At 131 m² it's 17% larger than the typical home in the postcode (112 m² median across 7 EPCs). Its energy rating outperforms most of the postcode (better than 86% of similar EPCs). Last changed hands 11 years ago, in January 2015.
Council records include a part-single-part-two-storey rear extension at 4 Mary Street.
Replacement of existing single glazed timber sliding sash windows with new double glazed timber sliding sash windows to front and rear elevations and painting of window frames
Sale price has at least doubled since 2004.
£1,837,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.5% per year over 11 years.
£1,359,000
Growth on file: 7.5% per year over 11 years.
On epc rating, 4 Mary Street stands well clear of the street.
Price per m²
£10,374
Street avg £10,753
Floor Area
131 m²
Street avg 117 m²
Habitable Rooms
4 rooms
Rail-style transport is unusually close for this postcode.
Crime
10/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Basire Street — bus stop.

Daytime· 07:00 – 23:00
55.9dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency improved
Single glazing replaced with double or better glazing
Wall insulation improved
Loft insulation upgraded to recommended levels
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Part single, part two storey · Rear of property
Replacement of existing part width two storey rear extension with a full width part single storey part two storey rear extension. Installation of replacement triple glazed timber sash windows to rear elevation.
1 more application for this property
Join to see all planning history.
30 January 2015Most recent
£1,359,000
+117.4%over 10 years30 April 2004
£625,000
Median price across the last 5 sales in N1 7DL: £1,250,000 (2020–2018).
Street avg 5 rooms
CO₂ Emissions
3.7 t/year
Street avg 6.0 t/year
N1 7BB
Closest school
0.3 km
City of London Academy Islington. 98 schools nearby.
Night-time· 23:00 – 07:00
45.3dB
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