Sort by Most recent sale Address Highest price Highest £ per sqm Largest area Smallest area	Last sold	Price paid	Floor area (m²) Floor area (sq ft)	£ per m² £ per sq ft	Type	Sold	m² sq ft	£/m² £/sq ft
3, Union Street, Seaham, SR7 7QH -	01 Oct 2025	£101,000	67 m² 721 sqft	£1,507 £140	Terrace (2 bed)
12, Union Street, Seaham, SR7 7QH -	29 Aug 2025	£53,000	67 m² 721 sqft	£791 £73	Terrace (2 bed)
11, Union Street, Seaham, SR7 7QH -	24 Jun 2025	£82,000	69 m² 742 sqft	£1,188 £110	Terrace (2 bed)
7, Union Street, Seaham, SR7 7QH -	27 Jun 2024	£105,000	121 m² 1302 sqft	£867 £80	Terrace (2 bed)
15, Union Street, Seaham, SR7 7QH -	25 Jul 2022	£77,500	90 m² 968 sqft	£861 £79	Terrace (2 bed)
17, Union Street, Seaham, SR7 7QH -	01 Jul 2019	£78,000 B	70 m² 753 sqft	£1,114 £103	Terrace (2 bed)
16, Union Street, Seaham, SR7 7QH -	03 Aug 2018	£53,000	69 m² 742 sqft	£768 £71	Terrace (2 bed)
20, Union Street, Seaham, SR7 7QH -	19 Jul 2017	£64,000	68 m² 731 sqft	£941 £87	Terrace (2 bed)
Park House, Union Street, Seaham, SR7 7QH	24 Apr 2015	£158,000	153 m² 1646 sqft	£1,032 £95	Detached (5 bed)
1, Union Street, Seaham, SR7 7QH -	17 Jan 2014	£66,000	98 m² 1054 sqft	£673 £62	Terrace (4 bed)
2, Union Street, Seaham, SR7 7QH -	28 May 2010	£78,000	73 m² 785 sqft	£1,068 £99	Semi-D (2 bed)
14, Union Street, Seaham, SR7 7QH -	09 Oct 2007	£92,500			Terrace (2 bed)
19, Union Street, Seaham, SR7 7QH	20 Dec 2001	£30,000			Terrace (2 bed)
5, Union Street, Seaham, SR7 7QH -	21 Dec 1999	£17,000	69 m² 742 sqft	£246 £22	Terrace (1 bed)
4, Union Street, Seaham, SR7 7QH	01 Jul 1997	£21,950			Terrace (2 bed)
18, Union Street, Seaham, SR7 7QH	18 Jun 1997	£12,750			Terrace (2 bed)
9, Union Street, Seaham, SR7 7QH	06 Dec 1996	£28,000			Terrace (3 bed)
8, Union Street, Seaham, SR7 7QH	27 Nov 1995	£31,500			Terrace (2 bed)
3, Union St -	£101,000 Oct-2025	67 721	1,507 140
12, Union St -	£53,000 Aug-2025	67 721	791 73
11, Union St -	£82,000 Jun-2025	69 742	1,188 110
7, Union St -	£105,000 Jun-2024	121 1302	867 80
15, Union St -	£77,500 Jul-2022	90 968	861 79
17, Union St -	£78,000 B Jul-2019	70 753	1,114 103
16, Union St -	£53,000 Aug-2018	69 742	768 71
20, Union St -	£64,000 Jul-2017	68 731	941 87
Park House, Union St	£158,000 Apr-2015	153 1646	1,032 95
1, Union St -	£66,000 Jan-2014	98 1054	673 62
2, Union St -	£78,000 May-2010	73 785	1,068 99
14, Union St -	£92,500 Oct-2007
19, Union St	£30,000 Dec-2001
5, Union St -	£17,000 Dec-1999	69 742	246 22
4, Union St	£21,950 Jul-1997
18, Union St	£12,750 Jun-1997
9, Union St	£28,000 Dec-1996
8, Union St	£31,500 Nov-1995

The data above for Union Street can be visualised as a scatter graph, this will show price trends over time.

The average price per square metre (per square foot) in Union Street, Seaham is £1,092 sqm (£101 per sq ft), this is calculated from sold house prices of the 6 most recent sales.
The majority of homes in Seaham are now selling for between £820 and £2,310 per square metre (£76 and £214 per square foot) , find out more in this local analysis of SR7 7 (Seaham) house prices.
There are approximately 18 homes on Union Street, we would have expected about 2 sales each year given that in the UK people sell their homes on average once every 7 years.
In the last 4 years there have been 6 property sales in Union Street, averaging approximately 1 home sales per year .
The average size of all the properties on Union Street is 88 m2 (947 sqft).