Green Diamond, Flat 3, Bartholomew Square, Brighton, BN1 1JS
About Green Diamond
Green Diamond is a mid-terrace house in Brighton (BN1 1JS). It has a recorded floor area of 30 m² (around 323 sq ft), construction records dating it to 2012-2021 and council tax band B. The latest certificate (January 2026) shows a C (score 79), near the top of the C band. The rating has held steady at C across 2 certificates since February 2016. Between certificates, hot-water efficiency went from Very Poor to Poor and main heating went from Very Poor to Average; while window efficiency dropped from Very Good to Average and lighting dropped from Very Good to Good. The recommended improvements would push it to B (score 81). Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition. At 30 m² this is the 3rd smallest of 40 units on EPC record in Green Diamond, where floor areas span 26–185 m². The building's EPC ratings span D to B across 40 units on file.
At 30 m² it sits well below the postcode median (49 m² across 39 EPCs), making it one of the more compact homes locally.
Everything you need to know about Green Diamond
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Green Diamond's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system upgraded to a more efficient system
Heating controls upgraded for better temperature management
Hot water system upgraded
Wall insulation upgraded
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
Green Diamond has no planning applications on record.
But the area is active
27 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Green Diamond has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£181,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 4 sales in BN1 1JS: £300,000 (2022–2016).
Versus other Bartholomew Square homes
Floor Area for Green Diamond lags the street by a wide margin.
EPC Rating
79 (C)
Street avg 75 (C)
Floor Area
30 m²
Street avg 51 m²
CO₂ Emissions
0.4 t/year
Street avg 0.6 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Everything you need to know about Green Diamond
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Crime
21/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Pool Valley Coach Station — bus station.
Closest school
0.2 km
Middle Street Primary School. 22 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
58.5dB
Night-time· 23:00 – 07:00
49.0dB