Our Data Sources
18, Thirlmere, Stevenage has no recent1 records in the Land Registry and a single entry in the EPC database dated March 2020.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 4 out of 5 and is considered of high accuracy.
1Sales dated prior to 2007 are shown, but are not used in our calculations.
Price Range & Condition
Decorative condition can have a big effect on a property's value and this effect varies depending on the type, size and location of the property.
If 18, Thirlmere, Stevenage is in very good condition we estimate a sale value of £362,119 and a rental value of £1,556 per month.
However, if the property needs a lot of cosmetic work we estimate a sale value of £320,734 and a rental value of £1,378 per month.
Plot Size
According to data from HM Land Registry, 18, Thirlmere, Stevenage sits on a plot of 145 m2.
We have plot size data on 30 out of 30 other houses in the postcode and 18, Thirlmere, Stevenage sits on the 28th largest plot.
Energy Efficiency
18, Thirlmere, Stevenage has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 09 Mar 2020.
The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
According to HM Land Registry, 18, Thirlmere, Stevenage was last sold on 20th December 1999 for £92,500 and was recorded as a freehold house.
The property has only had this single sale since 1995.
- Sold Dec 1999£92,500
Similar Properties Sold Nearby
According to the Land Registry and our network of Estate Agents, there have been 109 sales of properties similar to 18, Thirlmere, Stevenage within a radius of 700 metres since 2011.
The most recent example is 58, Grasmere, Stevenage, SG1 6AU, a freehold house which sold for £330,000 on the 12th February 2026.
Read more about house prices in SG1.
- Sold Feb 2026£330,000 | 2 Bed House58, Grasmere, Stevenage, SG1 6AU58, Grasmere, Stevenage, SG1 6AU
- Sold Nov 2025£345,000 | 2 Bed House119, Fairfield Way, Stevenage, SG1 6BG119, Fairfield Way, Stevenage, SG1 6BG
- Sold Nov 2025£315,000 | 2 Bed House85, Fairfield Way, Stevenage, SG1 6BG85, Fairfield Way, Stevenage, SG1 6BG
- Sold Oct 2025£322,000 | 2 Bed House4, Ullswater Close, Stevenage, SG1 6AF4, Ullswater Close, Stevenage, SG1 6AF
- Sold Aug 2025£302,534 | 2 Bed House37, Grasmere, Stevenage, SG1 6AU37, Grasmere, Stevenage, SG1 6AU
Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Explore Nearby Properties
The surrounding properties have an average estimated value of £390,914, ranging from £328,341 to £522,787.
- 16 Thirlmere
2 Bed House | 4 m | Est. Value: £348,923
- 20 Thirlmere
3 Bed House | 7 m | Est. Value: £386,625
- 24 Thirlmere
3 Bed House | 15 m | Est. Value: £375,337
- 26 Thirlmere
3 Bed House | 26 m | Est. Value: £401,451
- 14 Ullswater Close
3 Bed House | 27 m | Est. Value: £363,412
Location Comparison
Thirlmere, Stevenage, SG1 has a total of 72 addresses. According to our analysis of all the public data, 18, Thirlmere, Stevenage is the 71st largest and the 72nd most expensive property on the street.
When compared to the postcode district it is £9k more expensive than the average property in SG1.
More reading links
Schools Nearby
- Martins Wood Primary School900 m away
- Round Diamond Primary School1.0 km away
- The Leys Primary and Nursery School1.3 km away
- The Nobel School1.5 km away
- Marriotts School2.5 km away
- Barclay Academy3.0 km away
More reading links
Public Transport Nearby
- Stevenage|4.0 km away
- Knebworth|6.6 km away
- Hitchin|7.7 km away
Available Internet Speeds
According to recent data from Ofcom, Ultrafast Broadband is available in this area.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.
