1d, New Road, Welwyn, AL6 0AE
About 1d
1d is a four-bedroom semi-detached house in Welwyn (AL6 0AE). It has a recorded floor area of 189 m² (around 2034 sq ft), construction records dating it to 2003-2006 and council tax band G. The latest certificate (January 2023) shows a C (score 75), near the top of the C band. The rating has held steady at C across 2 certificates since December 2008. Between certificates, lighting dropped from Good to Average. The recommended improvements would push it to B (score 85).
Across 2004–2023, sale prices on this property compounded at 1.3% per year. Today's modelled estimate of £749,000 is 18.9% above the 2023 sale price. On a £-per-square-foot basis, the last sale (£310/sq ft) was about 21.5% below the postcode norm. Last sale on file: £630,000 in February 2023.
Know exactly what you're buying at 1d
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
- Bathrooms2
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Planning history
1d has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
We flagged 1 thing worth checking at 1d
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
1d's sale-price growth has lagged the wider UK trajectory across its history on file.
£749,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.3% per year over 19 years.
£630,000
Growth on file: 1.3% per year over 19 years.
Sales timeline
3 February 2023Most recent
£630,000
-3.1%over 13 years2 July 2009
£650,000
+31.3%over 5 years27 February 2004
£494,950
Median price across the last 5 sales in AL6 0AE: £867,500 (2025–2016).
Everything we know about 1d, 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 New Road homes
EPC Rating for 1d runs comfortably ahead of the street norm.
Price per m²
£3,333
Street avg £4,388
Floor Area
189 m²
Street avg 176 m²
Habitable Rooms
6 rooms
Street avg 8 rooms
CO₂ Emissions
4.8 t/year
Street avg 6.5 t/year
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
0.1 km
Welwyn North Railway Station — bus stop.
Closest school
0.4 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.