37 Harmer Green Lane, Welwyn, AL6 0AS
About 37 Harmer Green Lane
37 Harmer Green Lane is a five-bedroom detached house in Welwyn (AL6 0AS). It has a recorded floor area of 183 m² (around 1972 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (December 2008) shows a D (score 66), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 70). The latest certificate is from December 2008, so improvements made since then won't be reflected.
It hasn't traded since June 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £1,094,000 sits 75% above the 2009 sale of £625,000. On a £-per-square-foot basis, the last sale (£317/sq ft) was about 18.3% above the typical sold price in the postcode. 2 planning records sit against the property, 0 approved, 2 refused. At 183 m² it's 21.4% smaller than the typical home in the postcode (233 m² median across 7 EPCs).
Know exactly what you're buying at 37 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
- Bedrooms5
Energy performance
37 Harmer Green Lane's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 21 Dec 2018
EPC Rating
Planning history
37 Harmer Green Lane has 2 separate extension applications on the council record.
- Sept 2008ExtensionFullIn report
Extension: Single storey
ERECTION OF FIRST FLOOR SIDE EXTENSION
- Documents
- 8 docs on file
- Reference
- N6/2008/1355/FP
- Mar 2008ExtensionFullIn report
Extension: Single storey · Side of property
ERECTION OF FIRST FLOOR SIDE EXTENSION ABOVE EXISTING GARAGE
- Documents
- 5 docs on file
- Reference
- N6/2008/0108/FP
We flagged 1 thing worth checking at 37 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 fell during the post-2008 dip, often a low-water mark in price comparisons.
£1,094,000
Modelled from EPC, postcode comparables.
£625,000
Recorded with HM Land Registry.
Sales timeline
24 June 2009Most recent
£625,000
1 April 2004
£625,000
Median price across the last 5 sales in AL6 0AS: £840,000 (2025–2013).
Nearby sales in AL6 0AS
Everything we know about 37 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, 37 Harmer Green Lane stands well clear of the street.
Price per m²
£3,412
Street avg £4,162
Floor Area
183 m²
Street avg 227 m²
Habitable Rooms
8 rooms
Street avg 8 rooms
CO₂ Emissions
5.7 t/year
Street avg 5.9 t/year
Similar properties nearby
1 Broom Hill
AL6 0SF
1 Acorn Glade, Digswell
AL6 0AZ
1 Desborough Drive, Tewin
AL6 0HQ
1 Cob Lane Close, Digswell
AL6 0DD
1 Churchfield Road, Tewin
AL6 0JW
1 Badgers Walk, Tewin
AL6 0HP
1 Chestnut Walk
AL6 0SB
1 Barneswood
AL6 0EU
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
Mornington — bus stop.
Closest school
0.9 km
St John's CofE Primary School. 14 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.