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Green Diamond, Flat 40, Bartholomew Square, Brighton, BN1 1JS

Estimated value

£388,000

  • Since the 2016 sale (£250,000)+55%
  • Against BN1 1JS's recent median (£350,000)+11%

Newest record on this page: February 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Mid terrace
Floor 03
Bedrooms
2
Bathrooms
2
Floor area
83 m²
893 sq ft
Energy rating
C
Score 78
Council tax
Band E
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£388,000

  • Against its 2016 sale (£250,000)+55%
  • Against BN1 1JS's recent median (£350,000)+11%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for Green Diamond is modelled from its 83 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in BN1 1JS. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    83 m² from the EPC lodged in February 2026

  • Sales of this home

    1 sale recorded, the latest in 2016

  • Recent sales in BN1 1JS

    3 sales, median £350,000 (2022–2016)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: November 2022Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

Sales timeline

  1. 30 March 2016Most recent

    £250,000

Median price across the last 3 sales in BN1 1JS: £350,000 (2022–2016).

Risks

What this page doesn't show

2 potential issues have already been flagged for Green Diamond, Flat 40, Bartholomew Square, Brighton, BN1 1JS. The detail, evidence and what to ask about it are in the Risks Report.
  • Signs of HMO activity in the areaIn report
  • Larger development activity nearbyIn report
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

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Overview

About Green Diamond

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

Green Diamond is a two-bedroom mid-terrace house in Brighton (BN1 1JS). It has a recorded floor area of 83 m² (around 893 sq ft), construction records dating it to 2012-2021 and council tax band E. The latest certificate (February 2026) shows a C (score 78), near the top of the C band. When first surveyed in February 2016 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Average. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition. The property has underfloor heating on record, all of which lower running costs and tend to lift resale appeal. Other recorded features include a balcony. At 83 m² this is the 39th 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 83 m² the property is well over the postcode median (48 m² across 39 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £388,000 sits 55.2% above the 2016 sale of £250,000. On a £-per-square-foot basis, the last sale (£280/sq ft) was about 55.2% below the postcode norm. 10 years since the last transfer (March 2016).

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

  • Bedrooms2
  • Bathrooms2
  • Dining roomYes
  • Utility roomYes
  • EnsuiteYes

Outside

  • Private gardenYes
  • ParkingOff road
  • BalconyYes

Building

  • Underfloor heatingYes
  • LiftYes
Before you decide

Everything you need to know about Green Diamond

The true value, the hidden risks and the full sale history, in one report.

Signs of HMO activity in the areaLarger development activity nearby

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

Green Diamond's carbon output is low for the local stock.

Current Certificate(1 of 2)
Feb 2026

EPC Rating

A
B
C
C78
D
E
F
G
Main Heating
Electric
Main Fuel
Electric
Hot Water
Very Poor
Windows
Average
CO2 Emissions
0.5 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 24 February 2036

9 years remaining

Property Improvements

Changes detected from historical EPC data

Feb 2026from Feb 2016
EPC improved fromD68toC78
Heating System
Room HeatersUnderfloor

Heating system upgraded to a more efficient system

Heating Controls
Prog + StatFull Control

Heating controls upgraded for better temperature management

Planning

Planning history

Applications and permits filed against Green Diamond, Flat 40, Bartholomew Square, Brighton, BN1 1JS, sourced from the PlanIt planning register.

Green Diamond has no planning applications on record.

25

But the area is active

25 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.

On the street

Versus other Bartholomew Square homes

Four headline reads against 39 similar flats on this street, drawn from the latest EPC and Land Registry data.

Green Diamond outperforms the street on floor area by a wide margin.

EPC Rating

78 (C)

Street avg 75 (C)

Above

Floor Area

83 m²

Street avg 50 m²

Strongly above

CO₂ Emissions

0.5 t/year

Street avg 0.6 t/year

Below

Habitable Rooms

4 rooms

Street avg 3 rooms

Strongly above
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Brighton district page.
Full Brighton report

Crime

1110/mo

Falling 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.

Nearest schools

  • Middle Street Primary SchoolPrimary233m
  • St Paul's CofE Primary SchoolPrimary701m
  • Carlton Hill Primary SchoolPrimary733m
  • St Mary Magdalen Catholic Primary SchoolPrimary842m

Nearest stops

  • Pool Valley Coach StationBus station150m
  • Ship StreetBus stop153m
  • Palace PierBus stop160m
  • North StreetBus stop195m

Most reported crime locally

  • Violence & Sexual Offences4,189 reports27%
  • Shoplifting2,866 reports18%
  • Anti-social Behaviour2,547 reports16%
  • Public Order1,432 reports9%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around BN1 1JS from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for BN1 1JS

Daytime· 07:00 – 23:00

58.5dB

Moderate
Night-time road noise heatmap for BN1 1JS

Night-time· 23:00 – 07:00

49.0dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 3 Building Survey

21st century3rd Floor FlatEPC CNo mains gas

Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.

From £955 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
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£348k

1a, Flat 2, Union Street

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Flat
£343k

1a, Flat 1, Union Street

BN1 1HA

Flat
£324k

1a, Flat 3, Union Street

BN1 1HA

Flat
£312k

20 21, Top Flat, East Street

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Flat
£293k

20 21, First Floor Flat, East Street

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£293k

20 21, Flat, East Street

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Flat

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for Green Diamond is modelled from its 83 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in BN1 1JS. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 1 sale is recorded for Green Diamond. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for Green Diamond was lodged in February 2026 at band C and is valid until February 2036. 2 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to Green Diamond. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 14 months, which places each incident at an approximate point. The 22 schools and 30 stops listed are measured in a straight line from BN1 1JS, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Council tax band
Green Diamond is in council tax band E. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about Green Diamond, Flat 40, Bartholomew Square, Brighton, BN1 1JS. Each answer is also embedded as structured data for search engines.

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