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Get startedThe Cobalt Building 10 15 is a two-bedroom mid-terrace house in City Of London, London, London (EC2Y 8AH). It has a recorded floor area of 64 m² (around 689 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (February 2025) shows a C (score 74). The rating has held steady at C across 17 certificates since December 2008. Between certificates, lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Average to Poor and main heating dropped from Poor to Very Poor. The recommended improvements would push it to B (score 81). Main heating runs on electricity.
Sale prices here have outpaced London HPI: 6.9% per year against 0% for the wider region. Today's modelled estimate of £692,000 is 38.4% above the 2017 sale price. 9 years since the last transfer (July 2017). Across the public record there are 4 sales, relatively high churn for a single property.
Sale price has grown by over 3x since 1997.
£692,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.9% per year over 20 years.
£500,000
Growth on file: 6.9% per year over 20 years.
Rail-style transport is unusually close for this postcode.
Crime
8/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Beech Street — bus stop.

Daytime· 07:00 – 23:00
58.9dB

Changes detected from historical EPC data
Wall insulation upgraded
More low energy lighting installed
Ventilation system changed
Low energy lighting percentage decreased
More low energy lighting installed
Hot water efficiency decreased
More low energy lighting installed
Hot water efficiency improved
Low energy lighting percentage decreased
Wall insulation upgraded
Low energy lighting percentage decreased
Heating system changed
Hot water efficiency decreased
Heating system upgraded to a more efficient system
Hot water efficiency improved
More low energy lighting installed
Heating system changed
Hot water efficiency decreased
Wall insulation upgraded
Low energy lighting percentage decreased
Heating system upgraded to a more efficient system
Heating controls changed
Hot water efficiency improved
More low energy lighting installed
Heating system changed
Heating controls upgraded for better temperature management
Hot water efficiency improved
Wall insulation upgraded
Heating system upgraded to a more efficient system
Heating controls changed
Hot water efficiency decreased
More low energy lighting installed
Heating system changed
Heating controls upgraded for better temperature management
Hot water efficiency decreased
Heating system upgraded to a more efficient system
Hot water efficiency improved
Heating system changed
Heating controls upgraded for better temperature management
Hot water efficiency decreased
Are we missing something? Tell us about home improvements to help adjust your valuation.
18 July 2017Most recent
£500,000
+75.4%over 12 years6 August 2004
£285,000
+29.6%over 6 years23 December 1997
£219,850
+69.4%over 9 months21 March 1997
£129,746
EC2Y 8AY
Closest school
0.2 km
Prior Weston Primary School and Children's Centre. 95 schools nearby.
Night-time· 23:00 – 07:00
49.8dB
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