81 Hertford Road, Welwyn, AL6 0BU
About 81 Hertford Road
81 Hertford Road is a four-bedroom semi-detached house in Welwyn (AL6 0BU). It has a recorded floor area of 101 m² (around 1087 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (November 2016) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since February 2012. Between certificates, wall efficiency went from Very Poor to Good; while roof efficiency dropped from Good to Average and lighting dropped from Very Good to Good. The recommended improvements would lift it to B (score 81), a 2-band jump.
At 101 m² the property is well over the postcode median (64 m² across 9 EPCs), placing it in the larger end of the local stock. 5 planning records sit against the property, 3 approved, 2 refused. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. Across 2007–2021, sale prices on this property compounded at 4.9% per year. Today's modelled estimate of £727,000 is 12.7% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£593/sq ft) was about 60.6% above the typical sold price in the postcode. Sold February 2021 for £645,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 81 Hertford Road
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
- Bedrooms4
- Bathrooms1
- Dining roomYes
- CloakroomYes
- EnsuiteYes
Outside
- Private gardenYes
- DrivewayYes
Building
- RefurbishedYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Cavity wall insulation installed
Planning history
Planning history includes recorded demolition works, indicating a major rebuild phase at this address.
- Apr 2019ConditionsIn report
Submission of details pursuant to condition 1 (materials samples) on planning permission 6/2018/1292/HOUSE
- Reference
- 6/2019/0019/COND
- Jul 2018DemolitionIn report
Extension: Single storey · Side of property
Erection of a single side storey extension following demolition of an existing car port
Extension- Reference
- 6/2018/1403/EM
We flagged 1 thing worth checking at 81 Hertford Road
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.
£727,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.9% per year over 13 years.
£645,000
Growth on file: 4.9% per year over 13 years.
Sales timeline
4 February 2021Most recent
£645,000
+27.1%over 3 years1 June 2017
£507,500
+47.1%over 9 years21 November 2007
£345,000
Median price across the last 4 sales in AL6 0BU: £371,000 (2024–1998).
Everything we know about 81 Hertford Road, 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 Hertford Road homes
On floor area, 81 Hertford Road stands well clear of the street.
EPC Rating
60 (D)
Street avg 63 (D)
Floor Area
101 m²
Street avg 79 m²
CO₂ Emissions
4.4 t/year
Street avg 3.6 t/year
Habitable Rooms
4 rooms
Street avg 4 rooms
Similar properties nearby
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
0.4 km
Sloansway — bus stop.
Closest school
0.1 km
St John's CofE Primary School. 18 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.