The main church hall was finished in 1816 and is a Grade II-listed building since 1973 (English Heritage Building ID: 200246).
The architect is not known, although it is likely to have been designed by the Rev. William Jenkins, who is responsible for at least eleven Methodist chapels in the early 1800s, all clearly inspired by Wesley's Chapel of 1778 in City Road.
The Woolwich chapel was an enlarged version of the Wesleyan chapel in Rochester, Kent, a Jenkins design.
It measures 16 by 22 m (52x71 ft).
The Wellington Street façade has five bays and two floors with nine round-headed windows.
The centrally placed main entrance is accentuated by a prostyle portico.
The three central bays project slightly and are crowned by a pediment.
On the parapet below the pediment a stone plaque with the inscription The Methodist Chapel, 1816 is now covered up by a wooden sign with the text ਗੁਰਦੁਆਰਾ ਸਾਹਿਬ ਵੂਲਿਚ - Gurdwara Sahib Woolwich.
The west and east walls are plain brick with ten windows each.
At the north end of the building is a small apse and the former vestry.

The plainness of the interior of this type of Methodist chapel with its flat ceiling has been described as barn-like.
In the main seating on the ground floor rows of pews faced the pulpit.
Additional seating areas were created on the galleries situated around a large oval opening through which the pulpit could be seen.
Unusual in a Methodist church of this type is the presence of burial vaults underneath, "in case another Death should happen in the Preacher's family".
The two main floors of the building are currently used as Darbar Sahib Halls, the lower and upper prayer hall, containing the Guru Granth Sahib, the holy scriptures.
The main alterations for Sikh worship have been the removal of the pews and the insertion of a fixed floor where the galleries had been.
The main church hall was finished in 1816 and is a Grade II-listed building since 1973 (English Heritage Building ID: 200246). The architect is not known, although it is likely to have been designed by the Rev. William Jenkins, who is responsible for at least eleven Methodist chapels in the early 1800s, all clearly inspired by Wesley's Chapel of 1778 in City Road. The Woolwich chapel was an enlarged version of the Wesleyan chapel in Rochester, Kent, a Jenkins design. It measures 16 by 22 m (52x71 ft). The Wellington Street façade has five bays and two floors with nine round-headed windows. The centrally placed main entrance is accentuated by a prostyle portico. The three central bays project slightly and are crowned by a pediment. On the parapet below the pediment a stone plaque with the inscription The Methodist Chapel, 1816 is now covered up by a wooden sign with the text ਗੁਰਦੁਆਰਾ ਸਾਹਿਬ ਵੂਲਿਚ - Gurdwara Sahib Woolwich. The west and east walls are plain brick with ten windows each. At the north end of the building is a small apse and the former vestry.
The plainness of the interior of this type of Methodist chapel with its flat ceiling has been described as barn-like. In the main seating on the ground floor rows of pews faced the pulpit. Additional seating areas were created on the galleries situated around a large oval opening through which the pulpit could be seen. Unusual in a Methodist church of this type is the presence of burial vaults underneath, "in case another Death should happen in the Preacher's family". The two main floors of the building are currently used as Darbar Sahib Halls, the lower and upper prayer hall, containing the Guru Granth Sahib, the holy scriptures. The main alterations for Sikh worship have been the removal of the pews and the insertion of a fixed floor where the galleries had been.
Gurdwara Sahib Woolwich