According to data from HM Land Registry, 21, Portmarnock Way, Grantham sits on a plot of 180 m².

We have plot size data on 27 out of 29 other houses in the postcode and 21, Portmarnock Way, Grantham sits on the 23rd largest plot.

According to HM Land Registry, 21, Portmarnock Way, Grantham was last sold on 18th January 2008 for £145,000 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since January 2008, the market for similar properties has risen by 19.6%.

• Sold Jan 2008£145,000
• Sold Apr 2007£148,500
• Sold Nov 2005£125,995

According to the Land Registry and our network of Estate Agents, there have been 249 sales of properties similar to 21, Portmarnock Way, Grantham within a radius of 730 metres since 2019.

The most recent example is 57, Portrush Drive, Grantham, NG31 9GD, a freehold house which sold for £215,000 on the 21st November 2025.

Read more about house prices in NG31.

• Sold Nov 2025£215,000 | 3 Bed House57, Portrush Drive, Grantham, NG31 9GD57, Portrush Drive, Grantham, NG31 9GD
• Sold Oct 2025£197,500 | 3 Bed House38, Portmarnock Way, Grantham, NG31 9FL38, Portmarnock Way, Grantham, NG31 9FL
• Sold Sep 2025£218,000 | 3 Bed House14, Blairgowie Close, Grantham, NG31 9FJ14, Blairgowie Close, Grantham, NG31 9FJ
• Sold May 2025£252,000 | 3 Bed House24, Tom Childs Close, Grantham, NG31 9FR24, Tom Childs Close, Grantham, NG31 9FR
• Sold Mar 2025£225,000 | 3 Bed House23, Portmarnock Way, Grantham, NG31 9FL23, Portmarnock Way, Grantham, NG31 9FL
• Sold Jan 2025£795,000 | 3 Bed House65, Cavendish Way, Grantham, NG31 9FN65, Cavendish Way, Grantham, NG31 9FN
• Sold Dec 2024£236,000 | 3 Bed House3, Portmarnock Way, Grantham, NG31 9FL3, Portmarnock Way, Grantham, NG31 9FL
• Sold Oct 2024£235,000 | 3 Bed House6, Woodbrook, Grantham, NG31 9FT6, Woodbrook, Grantham, NG31 9FT
• Sold Sep 2024£260,000 | 3 Bed House10, Hoylake, Grantham, NG31 9FS10, Hoylake, Grantham, NG31 9FS
• Sold Sep 2024£210,000 | 3 Bed House49, Cavendish Way, Grantham, NG31 9FN49, Cavendish Way, Grantham, NG31 9FN
• Sold Aug 2024£186,000 | 3 Bed House18, Woodbrook, Grantham, NG31 9FT18, Woodbrook, Grantham, NG31 9FT
• Sold May 2024£172,500 | 3 Bed House19, Portmarnock Way, Grantham, NG31 9FL19, Portmarnock Way, Grantham, NG31 9FL
• Sold May 2023£200,000 | 3 Bed House47, Portrush Drive, Grantham, NG31 9GD47, Portrush Drive, Grantham, NG31 9GD
• Sold Nov 2022£218,000 | 3 Bed House14, Tom Childs Close, Grantham, NG31 9FR14, Tom Childs Close, Grantham, NG31 9FR
• Sold May 2022£234,000 | 3 Bed House31, Woodbrook, Grantham, NG31 9FT31, Woodbrook, Grantham, NG31 9FT
• Sold Dec 2021£235,000 | 3 Bed House35, Tom Childs Close, Grantham, NG31 9FR35, Tom Childs Close, Grantham, NG31 9FR
• Sold Dec 2021£240,000 | 3 Bed House4, Woodbrook, Grantham, NG31 9FT4, Woodbrook, Grantham, NG31 9FT
• Sold Jul 2020£165,000 | 3 Bed House29, Tom Childs Close, Grantham, NG31 9FR29, Tom Childs Close, Grantham, NG31 9FR
• Sold Jun 2020£172,000 | 3 Bed House3, Blairgowie Close, Grantham, NG31 9FJ3, Blairgowie Close, Grantham, NG31 9FJ
• Sold Sep 2019£195,000 | 3 Bed House9, Blairgowie Close, Grantham, NG31 9FJ9, Blairgowie Close, Grantham, NG31 9FJ

Portmarnock Way, Grantham, NG31 has a total of 29 addresses. According to our analysis of all the public data, 21, Portmarnock Way, Grantham is the 21st largest and the 20th most expensive property on the street.

When compared to the postcode district it is £8k more expensive than the average property in NG31.

• Belmont Community Primary School

  500 m away
• Belton Lane Community Primary School

  900 m away
• The Harrowby Church of England Primary School

  1.1 km away

• Kesteven and Grantham Girls' School

  1.9 km away
• The Priory Ruskin Academy

  2.0 km away
• The King's School, Grantham

  2.2 km away

• Grantham

  |

  2.8 km away
• Ancaster

  |

  8.8 km away
• Rauceby

  |

  12.5 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.