57 Harmer Green Lane, Welwyn, AL6 0AP
About 57 Harmer Green Lane
57 Harmer Green Lane is a two-bedroom detached house in Welwyn (AL6 0AP). It has a recorded floor area of 140 m² (around 1507 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (March 2022) shows an E (score 41), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since September 2011. Between certificates, roof efficiency went from Very Poor to Poor and lighting went from Good to Very Good. The recommended improvements would lift it to C (score 79), a 2-band jump.
At 140 m² it sits well below the postcode median (557 m² across 6 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). 2 bedrooms is on the smaller side for this postcode, where 4 is the typical count. On a £-per-square-foot basis, the last sale (£465/sq ft) was about 73.7% above the typical sold price in the postcode. Sold November 2023 for £700,000.
Know exactly what you're buying at 57 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
Energy performance
57 Harmer Green Lane's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Roof insulation improved
More low energy lighting installed
Planning history
57 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 57 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
£765,000
Modelled from EPC, postcode comparables.
£700,000
Recorded with HM Land Registry.
Sales timeline
17 November 2023Most recent
£700,000
Median price across the last 5 sales in AL6 0AP: £2,080,000 (2023–2005).
Nearby sales in AL6 0AP
Everything we know about 57 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 years held, 57 Harmer Green Lane runs well behind the street norm.
Price per m²
£5,000
Street avg £3,764
Floor Area
140 m²
Street avg 491 m²
Habitable Rooms
4 rooms
Street avg 11 rooms
CO₂ Emissions
10.0 t/year
Street avg 7.9 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
0.3 km
New Road — bus stop.
Closest school
1.2 km
St John's CofE Primary School. 12 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.