18 Harmer Green Lane, Welwyn, AL6 0AX
About 18 Harmer Green Lane
18 Harmer Green Lane is a two-bedroom semi-detached house in Welwyn (AL6 0AX). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1950-1966 and council tax band E. The latest certificate (September 2020) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 77), a 2-band jump.
At 80 m² it's 24.5% smaller than the typical home in the postcode (106 m² median across 5 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs). 2 bedrooms is on the smaller side for this postcode, where 4 is the typical count. Today's modelled estimate of £591,000 is 24.4% above the 2020 sale price. Sold December 2020 for £475,000.
Know exactly what you're buying at 18 Harmer Green Lane
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
- Bedrooms2
- Bathrooms2
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
18 Harmer Green Lane has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
We flagged 1 thing worth checking at 18 Harmer Green Lane
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.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£591,000
Modelled from EPC, postcode comparables.
£475,000
Recorded with HM Land Registry.
Sales timeline
17 December 2020Most recent
£475,000
Median price across the last 5 sales in AL6 0AX: £490,000 (2024–2009).
Everything we know about 18 Harmer Green Lane, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Harmer Green Lane homes
On floor area, 18 Harmer Green Lane runs well behind the street norm.
Price per m²
£5,938
Street avg £6,194
Floor Area
80 m²
Street avg 102 m²
Habitable Rooms
3 rooms
Street avg 5 rooms
CO₂ Emissions
5.0 t/year
Street avg 5.9 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Welwyn North Railway Station — bus stop.
Closest school
0.5 km
St John's CofE Primary School. 15 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.