9 Warren Way, Welwyn, AL6 0DQ
About 9 Warren Way
9 Warren Way is a detached house in Welwyn (AL6 0DQ). It has a recorded floor area of 231 m² (around 2486 sq ft), construction records dating it to 1967-1975 and council tax band G. The latest certificate (May 2025) shows a C (score 71).
Held since September 2003 — that's 23 years off the open market, well above the local norm. At 231 m² the property is well over the postcode median (154 m² across 11 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 82% of similar EPCs). Across 2000–2003, sale prices on this property compounded at 4% per year. Today's modelled estimate of £1,085,000 sits 130.9% above the 2003 sale of £470,000. On a £-per-square-foot basis, the last sale (£189/sq ft) was about 53.5% below the postcode norm. One planning record on file: an extension approved in 2007. Past consents include an extension, meaningful when judging how the property has evolved.
Know exactly what you're buying at 9 Warren Way
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
Energy performance
9 Warren Way's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Planning history
9 Warren Way has an approved single-storey extension on the planning record.
- Aug 2007ExtensionFullIn report
Extension: Single storey
ERECTION OF A FIRST FLOOR REAR AND SIDE EXTENSION
- Documents
- 4 docs on file
- Reference
- N6/2007/1023/FP
We flagged 1 thing worth checking at 9 Warren Way
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
9 Warren Way valuation sits well clear of the typical sold price in this postcode.
£1,085,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.0% per year over 3 years.
£470,000
Growth on file: 4.0% per year over 3 years.
Sales timeline
10 September 2003Most recent
£470,000
+11.9%over 2 years3 November 2000
£420,000
Median price across the last 5 sales in AL6 0DQ: £850,000 (2025–2019).
Everything we know about 9 Warren Way, 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 Warren Way homes
Price per m² for 9 Warren Way lags the street by a wide margin.
Price per m²
£2,035
Street avg £5,643
Floor Area
231 m²
Street avg 147 m²
Habitable Rooms
4 rooms
Street avg 7 rooms
CO₂ Emissions
7.2 t/year
Street avg 6.3 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
0.3 km
Welwyn North Rail Station — railway station.
Closest school
0.8 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.