40 Union Street, Barnet, EN5 4HZ
About 40 Union Street
40 Union Street is a one-bedroom end-of-terrace house in Barnet (EN5 4HZ). It has a recorded floor area of 40 m² (around 431 sq ft), construction records dating it to before 1900 and council tax band C. The latest certificate (February 2022) shows a D (score 61), on the cusp of jumping into the C band. When first surveyed in February 2011 the rating was F, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Average to Good, lighting went from Average to Very Good and main heating went from Poor to Good. The recommended improvements would lift it to A (score 92), a 3-band jump.
Across 1995–2019, sale prices on this property compounded at -12.9% per year. Today's modelled estimate of £319,000 sits 21166.7% above the 2019 sale of £1,500. On a £-per-square-foot basis, the last sale (£3/sq ft) was about 99.1% below the postcode norm. At 40 m² it sits well below the postcode median (64 m² across 28 EPCs), making it one of the more compact homes locally. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Most recent transfer: August 2019 at £1,500. Across the public record there are 5 sales, relatively high churn for a single property.
Know exactly what you're buying at 40 Union Street
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms1
- Bathrooms1
Building
- Heating systemGas
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Replaced storage heaters with gas boiler
Connected to mains gas supply
Heating controls upgraded for better temperature management
Hot water system upgraded
Roof insulation improved
Heating controls upgraded for better temperature management
Hot water system changed
Single glazing replaced with double or better glazing
More low energy lighting installed
Heating controls upgraded for better temperature management
Hot water system upgraded
More low energy lighting installed
Planning history
40 Union Street has no planning applications on record.
Notable planning nearby
5applications of note in the surrounding area
We flagged 2 things worth checking at 40 Union Street
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Signs of HMO activity in the area
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Latest sale on 40 Union Street was the lowest on Land Registry record across the postcode.
£319,000
Modelled from EPC, postcode comparables and a sale-price growth of -12.9% per year over 24 years.
£1,500
Growth on file: -12.9% per year over 24 years.
Sales timeline
15 August 2019Most recent
£1,500
-99.2%over 11 years23 August 2007
£192,000
+23.9%over 1 year10 February 2006
£155,000
+78.2%over 5 years9 August 2000
£87,000
+120.3%over 4 years6 November 1995
£39,500
Median price across the last 5 sales in EN5 4HZ: £477,500 (2024–2022).
Everything we know about 40 Union Street, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby

Versus other Union Street homes
Price per m² for 40 Union Street lags the street by a wide margin.
Price per m²
£38
Street avg £6,025
Floor Area
40 m²
Street avg 76 m²
Habitable Rooms
2 rooms
Street avg 4 rooms
CO₂ Emissions
2.5 t/year
Street avg 4.4 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Salisbury Road — bus stop.
Closest school
0.3 km
Barnet and Southgate College. 16 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
51.6dB

Night-time· 23:00 – 07:00
42.3dB