Our Data Sources
9, Swangleys Lane, Knebworth has 2 entries in the Land Registry, most recently in July 2025 and a single entry in the EPC database dated August 2024.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate 9, Swangleys Lane, Knebworth would be worth £1,094,041, with a potential rental value of £4,057 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £969,008, with a rental value of £3,593 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
9, Swangleys Lane, Knebworth occupies a 1,233 m2 plot as recorded by HM Land Registry.
Of the 18 other houses in this postcode, 14 have recorded plot sizes, and this one ranks as the 5th largest.
Energy Efficiency
9, Swangleys Lane, Knebworth has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 08 Aug 2024.
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
9, Swangleys Lane, Knebworth last changed hands on 10th July 2025, selling for £1,265,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold twice since 1995.
The market for similar properties has dropped by 32.6% since July 2025.
- Sold Jul 2025£1,265,000
- Sold Dec 2015£750,725
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 32 sales of comparable properties within 990 metres of 9, Swangleys Lane, Knebworth since 2010.
Most recently, 12, Stevenage Road, Knebworth, SG3 6AW, a freehold house, sold at £920,000 on the 4th August 2025.
Read more about house prices in SG3.
- Sold Aug 2025£920,000 | 5 Bed House12, Stevenage Road, Knebworth, SG3 6AW12, Stevenage Road, Knebworth, SG3 6AW
- Sold Nov 2024£946,000 | 5 Bed House14, Stevenage Road, Knebworth, SG3 6AW14, Stevenage Road, Knebworth, SG3 6AW
- Sold Apr 2024£717,000 | 5 Bed House19, Watton Road, Knebworth, SG3 6AH19, Watton Road, Knebworth, SG3 6AH
- Sold Jun 2022£1,050,000 | 5 Bed House1, Watton Road, Knebworth, SG3 6AH1, Watton Road, Knebworth, SG3 6AH
- Sold May 2022£1,175,000 | 5 Bed House28, Watton Road, Knebworth, SG3 6AH28, Watton Road, Knebworth, SG3 6AH
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 £881,378, ranging from £668,757 to £1,236,765.
- 11 Swangleys Lane
4 Bed House | 20 m | Est. Value: £821,033
- 5 Swangleys Lane
4 Bed House | 38 m | Est. Value: £826,814
- 8 Swangleys Lane
5 Bed House | 44 m | Est. Value: £1,236,765
- 10A Swangleys Lane
4 Bed House | 48 m | Est. Value: £833,532
- 6 Swangleys Lane
5 Bed House | 48 m | Est. Value: £1,028,082
Location Comparison
Our analysis of the public data ranks 9, Swangleys Lane, Knebworth as the 4th largest and the 3rd most expensive of the 23 addresses on Swangleys Lane, Knebworth, SG3.
Against the SG3 postcode district average, it is £644k more expensive than the typical property.
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Schools Nearby
- Knebworth Primary and Nursery School200 m away
- All Saints Church of England Voluntary Aided Primary School, Datchworth1.4 km away
- St Michael's Woolmer Green CofE VA Primary School1.5 km away
- Barnwell School2.9 km away
- Marriotts School4.4 km away
- The Nobel School5.3 km away
More reading links
Public Transport Nearby
- Knebworth|600 m away
- Watton-at-Stone|4.3 km away
- Stevenage|4.5 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
