Our Data Sources
20, Mardley Heights, Welwyn has 21 entries in the Land Registry , most recently in November 2021 and a single entry in the EPC database dated April 2021.
We combine this information with that 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 20, Mardley Heights, Welwyn, we estimate a market value of £822,121 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 £728,164 and £2,617 per month respectively.
Plot Size
HM Land Registry records the plot of land for 20, Mardley Heights, Welwyn as measuring 668 m2.
Energy Efficiency
20, Mardley Heights, Welwyn has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 23 Apr 2021.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
The most recent sale of 20, Mardley Heights, Welwyn completed on 25th November 2021 at £750,000 and was recorded by HM Land Registry as a freehold house.
Since 1995 the property has sold twice.
Values of comparable properties have risen by 10.0% over the period since November 2021.
- Sold Nov 2021£750,000
- Sold Jun 2006£399,500
Similar Properties Sold Nearby
Over the past 2 years 171 properties similar to 20, Mardley Heights, Welwyn have sold within a radius of 1.4 kilometres, per the Land Registry and our network of Estate Agents.
The latest, on the 22nd October 2025, was 31, Hillside Way, Welwyn, AL6 0TY, a freehold house which sold for £715,000.
Read more about house prices in AL6.
- Sold Oct 2025£715,000 | 4 Bed House31, Hillside Way, Welwyn, AL6 0TY31, Hillside Way, Welwyn, AL6 0TY
- Sold Nov 2023£695,000 | 4 Bed House3A, Hillside Way, Welwyn, AL6 0TY3A, Hillside Way, Welwyn, AL6 0TY
- Sold Aug 2021£775,000 | 4 Bed House1, Hillside Way, Welwyn, AL6 0TY1, Hillside Way, Welwyn, AL6 0TY
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Of the 14 addresses on Mardley Heights, Welwyn, AL6, 20, Mardley Heights, Welwyn comes out as the 13th largest and the 10th most expensive in our analysis of the public data.
It is also £18k less expensive than the average property across the AL6 district.
More reading links
Schools Nearby
- St Michael's Woolmer Green CofE VA Primary School500 m away
- Oaklands Primary School1.0 km away
- All Saints Church of England Voluntary Aided Primary School, Datchworth1.9 km away
- Monk's Walk School3.5 km away
- Barnwell School4.9 km away
- Ridgeway Academy4.9 km away
More reading links
Public Transport Nearby
- Knebworth|2.3 km away
- Welwyn North|2.6 km away
- Watton-at-Stone|4.6 km away
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
