17 Firs Walk, Tewin, Welwyn, AL6 0NY
About 17 Firs Walk
17 Firs Walk is a detached house in Tewin, Welwyn, Welwyn (AL6 0NY). It has a recorded floor area of 301 m² (around 3240 sq ft), construction records dating it to 2018 and council tax band G. The latest certificate (October 2022) returns a B (score 81), comfortably above the UK average. When first surveyed in November 2013 the rating was D, the property has climbed 2 bands since. Between certificates, wall efficiency went from Good to Very Good, roof efficiency went from Average to Good and window efficiency went from Good to Very Good; while hot-water efficiency dropped from Average to Very Poor. Main heating runs on electricity: electricity, unspecified tariff.
At 301 m² the property is well over the postcode median (221 m² across 14 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £1,558,000 sits 134.3% above the 2014 sale of £665,000. On a £-per-square-foot basis, the last sale (£205/sq ft) was about 42.9% below the postcode norm. 7 planning records sit against the property, 3 approved, 2 refused. Past consents include an extension, meaningful when judging how the property has evolved. Last sold in May 2014, so it's been off the market for around 12 years.
Know exactly what you're buying at 17 Firs Walk
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
17 Firs Walk ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
Hot water efficiency decreased
High performance glazing installed
Wall insulation improved
Roof insulation improved
Floor insulation added or improved
More low energy lighting installed
Planning history
17 Firs Walk has 2 separate extension applications on the council record.
- Nov 2018ConditionsIn report
Discharge condition 12 (energy efficiency) attached to 3/16/2167/FUL
- Documents
- 3 docs on file
- Reference
- X/18/0529/CND
- Oct 2018ConditionsIn report
Discharge conditions 9 (tree/natural feature protection: fencing), 10 (tree protection: excavations) and 12 (energy efficiency) attached to 3/16/2167/FUL
- Documents
- 7 docs on file
- Reference
- X/18/0424/CND
We flagged 1 thing worth checking at 17 Firs Walk
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
17 Firs Walk valuation sits well clear of the typical sold price in this postcode.
£1,558,000
Modelled from EPC, postcode comparables.
£665,000
Recorded with HM Land Registry.
Sales timeline
1 May 2014Most recent
£665,000
Median price across the last 5 sales in AL6 0NY: £1,300,000 (2025–2020).
Nearby sales in AL6 0NY
Everything we know about 17 Firs Walk, 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 Firs Walk homes
On co₂ emissions, 17 Firs Walk stands well clear of the street.
Price per m²
£2,209
Street avg £4,835
Floor Area
301 m²
Street avg 236 m²
CO₂ Emissions
4.1 t/year
Street avg 8.5 t/year
Years Held
12 years
Street avg 10 years
Similar properties nearby
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.7 km
Desborough Drive — bus stop.
Closest school
1.9 km
Tewin Cowper Church of England Voluntary Aided Primary School. 7 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.