22a, Hertford Road, Tewin, Welwyn, AL6 0JY
About 22a
22a is a four-bedroom detached house in Tewin, Welwyn, Welwyn (AL6 0JY). It has a recorded floor area of 145 m² (around 1564 sq ft) and council tax band G. The latest certificate (November 2010) shows a C (score 80), near the top of the C band. The recommended improvements would push it to B (score 82). The latest certificate is from November 2010, so improvements made since then won't be reflected.
2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 2011–2015, sale prices on this property compounded at 2.8% per year. Today's modelled estimate of £901,000 is 19.3% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£483/sq ft) was about 18.2% above the typical sold price in the postcode. Last sold in June 2015, so it's been off the market for around 11 years.
Know exactly what you're buying at 22a
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
Energy performance
22a'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This certificate is over 10 years old and is no longer valid.Expired 08 Nov 2020
EPC Rating
Planning history
22a has an approved single-storey side extension on the planning record.
- Jan 2016ExtensionFullIn report
Extension: Single storey · Side of property
Single storey side extension
- Agent
- SMB Design Services
- Documents
- 8 docs on file
- Reference
- 3/15/2353/HH
- Dec 2010RenovationFullIn report
Installation of Klargester septic tank to front of detached house - retrospective
Retrospective- Documents
- 10 docs on file
- Reference
- 3/10/1894/FP
We flagged 1 thing worth checking at 22a
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
£901,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.8% per year over 4 years.
£755,000
Growth on file: 2.8% per year over 4 years.
Sales timeline
4 June 2015Most recent
£755,000
+12.7%over 4 years14 January 2011
£670,000
Median price across the last 5 sales in AL6 0JY: £765,000 (2021–2015).
Nearby sales in AL6 0JY
4 Hertford Road, Tewin, Welwyn, AL6 0JY
Sold Jun 2021
£516,00012a, Hertford Road, Tewin, Welwyn, AL6 0JY
Sold Mar 2019
£875,00012b, Hertford Road, Tewin, Welwyn, AL6 0JY
Sold Feb 2019
£895,00020 Hertford Road, Tewin, Welwyn, AL6 0JY
Sold May 2016
£750,0002a, Hertford Road, Tewin, Welwyn, AL6 0JY
Sold May 2015
£765,000
Everything we know about 22a, 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
Price per m²
£5,196
Street avg £4,976
Floor Area
145 m²
Street avg 157 m²
CO₂ Emissions
2.9 t/year
Street avg 5.9 t/year
Years Held
11 years
Street avg 12 years
Similar properties nearby
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Rose and Crown PH — bus stop.
Closest school
0.1 km
Tewin Cowper Church of England Voluntary Aided Primary School. 8 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.