9 Lower Green, Tewin, Welwyn, AL6 0JX
About 9 Lower Green
9 Lower Green is a semi-detached house in Tewin, Welwyn, Welwyn (AL6 0JX). It has a recorded floor area of 114 m² (around 1227 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (October 2021) shows an E (score 54), well below the UK norm with real room to improve. When first surveyed in April 2011 the rating was F, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good, lighting went from Poor to Very Good and main heating went from Average to Good. The recommended improvements would push it to D (score 68).
4 planning records sit against the property, 2 approved, 2 refused. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. Across 2002–2022, sale prices on this property compounded at 4.6% per year. Most recent transfer: March 2022 at £675,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 9 Lower Green
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
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
More low energy lighting installed
Planning history
Planning history includes recorded demolition works, indicating a major rebuild phase at this address.
- Jan 2008DemolitionHeritageIn report
Extension: Single storey · Side and rear of property
Demolition of existing lean-to side extension. Erection of new single storey side/rear extension. Installation of new ground floor window in existing side elevation.
Extension- Documents
- 4 docs on file
- Reference
- 3/07/2519/LB
- Jan 2008ExtensionFullIn report
Extension: Side and rear of property
Single storey side/rear extension
- Documents
- 3 docs on file
- Reference
- 3/07/2518/FP
We flagged 1 thing worth checking at 9 Lower Green
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
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Sales history & valuation
Sale price has at least doubled since 2002.
£721,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.6% per year over 20 years.
£675,000
Growth on file: 4.6% per year over 20 years.
Sales timeline
18 March 2022Most recent
£675,000
+50.0%over 10 years25 August 2011
£450,000
+61.3%over 8 years29 August 2002
£279,000
Median price across the last 2 sales in AL6 0JX: £548,725 (2009–2007).
Everything we know about 9 Lower Green, 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

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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Rose and Crown PH — bus stop.
Closest school
0.1 km
Tewin Cowper Church of England Voluntary Aided Primary School. 9 schools nearby.
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