HM Land Registry records the plot of land for 5B, Roundabout Lane, Welwyn as measuring 1,617 m².

That makes it the largest plot in the postcode, where all 5 other houses have recorded plot data.

5B, Roundabout Lane, Welwyn has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 11 Aug 2025.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

Since 2017 196 properties similar to 5B, Roundabout Lane, 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 Dec 2025£775,000 | 4 Bed House1, Rosecroft Lane, Welwyn, AL6 0UB1, Rosecroft Lane, Welwyn, AL6 0UB
• Sold Nov 2025£747,218 | 4 Bed House4A, Heathbrow Road, Welwyn, AL6 0QG4A, Heathbrow Road, Welwyn, AL6 0QG
• Sold Jan 2025£750,000 | 4 Bed House17, Mardley Avenue, Welwyn, AL6 0TU17, Mardley Avenue, Welwyn, AL6 0TU
• Sold Dec 2024£778,000 | 4 Bed House13, Hillside Way, Welwyn, AL6 0TY13, Hillside Way, Welwyn, AL6 0TY
• Sold Aug 2024£695,000 | 4 Bed House8A, Firway, Welwyn, AL6 0RD8A, Firway, Welwyn, AL6 0RD
• Sold Aug 2024£900,000 | 4 Bed House11, Hangmans Lane, Welwyn, AL6 0TJ11, Hangmans Lane, Welwyn, AL6 0TJ
• Sold Jul 2024£810,000 | 4 Bed House24, Canonsfield, Welwyn, AL6 0QD24, Canonsfield, Welwyn, AL6 0QD
• Sold May 2024£720,000 | 4 Bed House27, Marlborough Close, Welwyn, AL6 0UG27, Marlborough Close, Welwyn, AL6 0UG
• Sold Jan 2024£700,000 | 4 Bed House3, Leonards Close, Welwyn, AL6 0QJ3, Leonards Close, Welwyn, AL6 0QJ
• Sold Sep 2023£745,000 | 4 Bed House17, The Chase, Welwyn, AL6 0QT17, The Chase, Welwyn, AL6 0QT
• Sold Oct 2022£950,000 | 4 Bed House13, Hangmans Lane, Welwyn, AL6 0TJ13, Hangmans Lane, Welwyn, AL6 0TJ
• Sold Jun 2022£830,000 | 4 Bed House5, Heathbrow Road, Welwyn, AL6 0QG5, Heathbrow Road, Welwyn, AL6 0QG
• Sold Jan 2022£840,000 | 4 Bed House12, Canonsfield, Welwyn, AL6 0QD12, Canonsfield, Welwyn, AL6 0QD
• Sold Aug 2021£775,000 | 4 Bed House1, Hillside Way, Welwyn, AL6 0TY1, Hillside Way, Welwyn, AL6 0TY
• Sold May 2021£760,000 | 4 Bed House17A, Briary Wood Lane, Welwyn, AL6 0TE17A, Briary Wood Lane, Welwyn, AL6 0TE
• Sold Dec 2020£615,000 | 4 Bed House24, Marlborough Close, Welwyn, AL6 0UG24, Marlborough Close, Welwyn, AL6 0UG
• Sold Oct 2019£695,000 | 4 Bed House16, Canonsfield, Welwyn, AL6 0QD16, Canonsfield, Welwyn, AL6 0QD
• Sold Feb 2018£625,000 | 4 Bed House14, Canonsfield, Welwyn, AL6 0QD14, Canonsfield, Welwyn, AL6 0QD
• Sold Sep 2017£735,000 | 4 Bed House1, Leonards Close, Welwyn, AL6 0QJ1, Leonards Close, Welwyn, AL6 0QJ

Of the 8 addresses on Roundabout Lane, Welwyn, AL6, 5B, Roundabout Lane, Welwyn comes out as the 7th largest and the 7th most expensive in our analysis of the public data.

It is also £37k more expensive than the average property across the AL6 district.

• Oaklands Primary School

  600 m away
• St Michael's Woolmer Green CofE VA Primary School

  900 m away
• Knebworth Primary and Nursery School

  2.2 km away

• Monk's Walk School

  3.2 km away
• Ridgeway Academy

  4.9 km away
• Barnwell School

  5.1 km away

• Knebworth

  |

  2.4 km away
• Welwyn North

  |

  2.5 km away
• Watton-at-Stone

  |

  5.0 km away

The flood risk here is rated Very Low, based on Environment Agency data.