21a, Southwick Street, Southwick, Brighton, BN42 4AD
About 21a
21a is a detached house in Southwick, Brighton, Brighton (BN42 4AD). It has a recorded floor area of 96 m² (around 1033 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (December 2018) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (August 2012); the latest reading is one band lower. Between certificates, wall efficiency dropped from Good to Poor and window efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 74). At 96 m² this is the 4th smallest of 11 units on EPC record in the building, where floor areas span 42–232 m². The building's EPC ratings span F to C across 11 units on file.
Today's modelled estimate of £314,000 is 37.2% below the 2016 sale of £500,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£484/sq ft) was about 149.1% above the typical sold price in the postcode. 10 years since the last transfer (May 2016). At 96 m² it's 15% smaller than the typical home in the postcode (113 m² median across 10 EPCs).
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Planning history
21a has no planning applications on record.
But the area is active
2 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21a valuation sits well clear of the typical sold price in this postcode.
£314,000
Modelled from EPC, postcode comparables.
£500,000
Recorded with HM Land Registry.
Sales timeline
30 May 2016Most recent
£500,000
Median price across the last 5 sales in BN42 4AD: £435,000 (2025–2018).
Nearby sales in BN42 4AD
17 Southwick Street, Southwick, Brighton, BN42 4AD
Sold Aug 2025
£299,95011 Southwick Street, Southwick, Brighton, BN42 4AD
Sold Oct 2022
£738,00015 Southwick Street, Southwick, Brighton, BN42 4AD
Sold May 2022
£435,00014 Southwick Street, Southwick, Brighton, BN42 4AD
Sold Aug 2020
£1,375,000Maple Lodge, Flat 4, 5 Southwick Street, Southwick, Brighton, BN42 4AD
Sold Aug 2018
£193,000
Similar properties nearby
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1 Highdown, Southwick
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Southwick Square — bus stop.
Closest school
0.6 km
Glebe Primary School. 15 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
51.1dB

Night-time· 23:00 – 07:00
41.7dB







