HM Land Registry records the plot of land for 21, Mariner Square, Sunderland as measuring 101 m².

That makes it the 16th largest plot in the postcode, where 19 of the 40 other houses have recorded plot data.

21, Mariner Square, Sunderland has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 11 Jun 2013.

The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

The most recent sale of 21, Mariner Square, Sunderland completed on 30th April 1998 at £32,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

• Sold Apr 1998£32,000

Since 2007 18 properties similar to 21, Mariner Square, Sunderland have sold within a radius of 790 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 17th December 2025, was 20, Maddison Court, Sunderland, SR1 2DZ, a freehold house which sold for £109,950.

Read more about house prices in SR1.

• Sold Dec 2025£109,950 | 3 Bed House20, Maddison Court, Sunderland, SR1 2DZ20, Maddison Court, Sunderland, SR1 2DZ
• Sold Oct 2025£82,500 | 3 Bed House24, Maddison Court, Sunderland, SR1 2DZ24, Maddison Court, Sunderland, SR1 2DZ
• Sold Apr 2024£87,500 | 3 Bed House16, Minorca Close, Sunderland, SR1 2PF16, Minorca Close, Sunderland, SR1 2PF
• Sold Jan 2024£89,995 | 3 Bed House3, Nesham Terrace, Sunderland, SR1 2DY3, Nesham Terrace, Sunderland, SR1 2DY
• Sold Oct 2022£95,000 | 3 Bed House29, Stafford Street, Sunderland, SR1 2DJ29, Stafford Street, Sunderland, SR1 2DJ
• Sold Oct 2022£85,500 | 3 Bed House10, Mariner Square, Sunderland, SR1 2DX10, Mariner Square, Sunderland, SR1 2DX
• Sold Oct 2021£85,000 | 3 Bed House5, Mariner Square, Sunderland, SR1 2DX5, Mariner Square, Sunderland, SR1 2DX
• Sold Mar 2021£70,000 | 3 Bed House9, Warren Square, Sunderland, SR1 2DU9, Warren Square, Sunderland, SR1 2DU
• Sold Jan 2021£80,000 | 3 Bed House28, Mariner Square, Sunderland, SR1 2DX28, Mariner Square, Sunderland, SR1 2DX
• Sold Oct 2020£65,000 | 3 Bed House23, Warren Square, Sunderland, SR1 2DU23, Warren Square, Sunderland, SR1 2DU
• Sold Aug 2018£70,000 | 3 Bed House12, Nesham Terrace, Sunderland, SR1 2DY12, Nesham Terrace, Sunderland, SR1 2DY
• Sold Aug 2015£69,950 | 3 Bed House5, Maddison Court, Sunderland, SR1 2DZ5, Maddison Court, Sunderland, SR1 2DZ
• Sold Sep 2014£57,000 | 3 Bed House22, Warren Square, Sunderland, SR1 2DU22, Warren Square, Sunderland, SR1 2DU
• Sold Jan 2014£54,000 | 3 Bed House21, Warren Square, Sunderland, SR1 2DU21, Warren Square, Sunderland, SR1 2DU
• Sold Apr 2010£72,000 | 3 Bed House19, Maddison Court, Sunderland, SR1 2DZ19, Maddison Court, Sunderland, SR1 2DZ
• Sold Aug 2009£65,000 | 3 Bed House6, Maddison Court, Sunderland, SR1 2DZ6, Maddison Court, Sunderland, SR1 2DZ
• Sold Dec 2007£95,995 | 3 Bed House3, Stafford Street, Sunderland, SR1 2DJ3, Stafford Street, Sunderland, SR1 2DJ
• Sold Sep 2007£50,000 | 3 Bed House12, James Williams Street, Sunderland, SR1 2JS12, James Williams Street, Sunderland, SR1 2JS

Of the 40 addresses on Mariner Square, Sunderland, SR1, 21, Mariner Square, Sunderland comes out as the 27th largest and the 27th most expensive in our analysis of the public data.

It is also £94k less expensive than the average property across the SR1 district.

• Dame Dorothy Primary School

  700 m away
• Hudson Road Primary School

  1.0 km away
• Redby Academy

  1.6 km away

• St Anthony's Girls' Catholic Academy

  2.0 km away
• Thornhill Academy

  2.3 km away
• Southmoor Academy

  2.4 km away

• Sunderland

  |

  1.2 km away
• Seaham

  |

  8.4 km away
• Heworth

  |

  13.0 km away

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