Osborn House, Flat 23, Howardsgate, Welwyn Garden City, AL8 6AT
About Osborn House
Osborn House is an end-of-terrace house in Welwyn Garden City (AL8 6AT). It has a recorded floor area of 28 m² (around 301 sq ft), construction records dating it to 1950-1966 and council tax band B. At 28 m² this is the smallest unit on EPC record across Osborn House (28–61 m²). The building's EPC ratings span E to C across 23 units on file. The latest certificate (November 2025) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 4 certificates since April 2009. Between certificates, hot-water efficiency went from Very Poor to Average and main heating went from Very Poor to Good; while wall efficiency dropped from Good to Average and roof efficiency dropped from Good to Very Poor. The recommended improvements would push it to C (score 74). Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.
At 28 m² it sits well below the postcode median (45 m² across 22 EPCs), making it one of the more compact homes locally.
Know exactly what you're buying at Osborn House
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Osborn House's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water system upgraded
Heating system upgraded to a more efficient system
Hot water efficiency improved
Planning history
Osborn House has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
Osborn House has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£168,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Everything we know about Osborn House, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?
Versus other Howardsgate homes
Floor Area for Osborn House lags the street by a wide margin.
EPC Rating
60 (D)
Street avg 60 (D)
Floor Area
28 m²
Street avg 41 m²
CO₂ Emissions
0.9 t/year
Street avg 2.6 t/year
Habitable Rooms
1 rooms
Street avg 2 rooms
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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
0.2 km
Bus Station — bus station.
Closest school
0.8 km
Peartree Primary School. 21 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.