Our Data Sources
8, Mardley Avenue, Welwyn has no records in the the Land Registry and a single entry in the EPC database dated March 2015.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For 8, Mardley Avenue, Welwyn, we estimate a market value of £727,045 and a rental value of £2,955 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £643,954 and £2,617 per month respectively.
Plot Size
HM Land Registry records the plot of land for 8, Mardley Avenue, Welwyn as measuring 486 m2.
That makes it the 12th largest plot in the postcode, where 12 of the 13 other houses have recorded plot data.
Energy Efficiency
8, Mardley Avenue, Welwyn has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 31 Mar 2015.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
Over the past 2 years 151 properties similar to 8, Mardley Avenue, Welwyn have sold within a radius of 1.2 kilometres, per the Land Registry and our network of Estate Agents.
The latest, on the 9th January 2026, was 50, Robbery Bottom Lane, Welwyn, AL6 0UN, a freehold house which sold for £658,000.
Read more about house prices in AL6.
- Sold Jan 2026£658,000 | 4 Bed House50, Robbery Bottom Lane, Welwyn, AL6 0UN50, Robbery Bottom Lane, Welwyn, AL6 0UN
- Sold Oct 2025£715,000 | 4 Bed House31, Hillside Way, Welwyn, AL6 0TY31, Hillside Way, Welwyn, AL6 0TY
- Sold May 2024£720,000 | 4 Bed House27, Marlborough Close, Welwyn, AL6 0UG27, Marlborough Close, Welwyn, AL6 0UG
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Of the 30 addresses on Mardley Avenue, Welwyn, AL6, 8, Mardley Avenue, Welwyn comes out as the 14th largest and the 19th most expensive in our analysis of the public data.
It is also £109k less expensive than the average property across the AL6 district.
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Schools Nearby
- St Michael's Woolmer Green CofE VA Primary School700 m away
- Oaklands Primary School800 m away
- All Saints Church of England Voluntary Aided Primary School, Datchworth2.1 km away
- Monk's Walk School3.3 km away
- Ridgeway Academy4.9 km away
- Barnwell School5.0 km away
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Public Transport Nearby
- Knebworth|2.4 km away
- Welwyn North|2.5 km away
- Watton-at-Stone|4.8 km away
Available Internet Speeds
Broadband here reaches superfast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
