Our Data Sources
20, Lower Mardley Hill, Welwyn has a single entry in the Land Registry from March 2007 and no records in the EPC database.
We combine this sold price information with public data of neighbouring properties to estimate the attributes and values.
The local information is scored as 2 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate 20, Lower Mardley Hill, Welwyn would be worth £873,745, with a potential rental value of £3,039 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £773,888, with a rental value of £2,692 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
20, Lower Mardley Hill, Welwyn occupies a 775 m2 plot as recorded by HM Land Registry.
All 5 other houses in this postcode have recorded plot sizes, and this one ranks as the 3rd largest.
Sold Prices
20, Lower Mardley Hill, Welwyn last changed hands on 29th March 2007, selling for £420,000. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has risen by 93.6% since March 2007.
- Sold Mar 2007£420,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 194 sales of comparable properties within 1.4 kilometres of 20, Lower Mardley Hill, Welwyn across the last 2 years.
Most recently, 1, Rosecroft Lane, Welwyn, AL6 0UB, a freehold house, sold at £775,000 on the 12th December 2025.
Read more about house prices in AL6.
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 20, Lower Mardley Hill, Welwyn as the 6th largest and the 4th most expensive of the 12 addresses on Lower Mardley Hill, Welwyn, AL6.
Against the AL6 postcode district average, it is £31k more expensive than the typical property.
More reading links
Schools Nearby
- Oaklands Primary School600 m away
- St Michael's Woolmer Green CofE VA Primary School1.0 km away
- All Saints Church of England Voluntary Aided Primary School, Datchworth2.4 km away
- Monk's Walk School3.0 km away
- Ridgeway Academy4.7 km away
- Barnwell School5.2 km away
More reading links
Public Transport Nearby
- Welwyn North|2.3 km away
- Knebworth|2.6 km away
- Welwyn Garden City|4.9 km away
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
