The Unitarian Church, Wellington Street. Originally founded in 1688 using a room in Bolton House Yard off Thistle Green as a Presbyterian Church. In 1699 a church was opened on Stockton High Street. The foundation stone of the Wellington Street Church was laid on 18th November, 1872 by Mr Eugene F. Clephan and Mr H.L.Briggs. Offically opened 22nd May 1873. The closure and final service ws on Sunday 10th April, 2005 
Picture Stockton Archive
A Pictorial History of Stockton-on-Tees
Although the building has been demolished, the church has not closed. A new modern energy efficient building has now been opened on part of the same site. It is always sad when a much loved building outgrows its usefulness, but we have to look to the future. The new building is much more suitable for a liberal religious group with a modern outlook. In particular it will use the minimum of precious resources and is generating its own electricity. We hope it will also be used by local community groups.
I was married in the Church. It sadly has now been demolished – to make room for a new Church 😉
Sadly its been demolished as I found out yesterday to my surprise as I drove past the street.
As stated by Peter, the Unitarian church was located between the corner of Wellington street and Vane street. I attended the church in the mid-60″s whilst living in Carlton street along with other children in the close knit community. I spent sunday afternoons at the small sunday school at the rear of the building which I think backed onto Howden street.The church, along with the masonic hall are the only buildings left in this small area.