24 Coney Street York

Overview

24 Coney Street is a Grade II listed timber-framed building which dates back to the 16th century, (with evidence of earlier medieval elements).

The property has undergone significant structural changes, including 18th-century remodelling, 19th-century commercial adaptations, and 20th-century alterations.

This case study synthesises findings from three key reports (2017, 2018, and 2023) to document the building’s structural condition and the conservation-led interventions undertaken.

Challenges and Solutions

• 2017: Inspections focused on the second-floor ceiling and its framing to the roof structure. Historic movement and localised failure of roof members were identified. Recommendations and detailing of structural strengthening were provided.
• 2018: Our inspections focused on the roof structure across all areas of the building. It identified historic alterations and key concerns included lateral instability and vertical displacement of roof members. Recommendations included targeted splice repairs, improved connections at the roof apex, and investigations into previous modifications that may have affected structural behaviour.
• 2023: We were commissioned to provide a comprehensive schedule of structural interventions for all other areas of the building. Key repairs include strengthening the jetty support frame, consolidating masonry with helical bar stitching, strengthening timber beams and joists, and upgrading ceiling structures particularly above the ornate second-floor ceiling. All design works meet conservation standards to ensure the building is safe and serviceable for future use.

MCA's Contribution

MCA provided structural engineering and conservation expertise throughout the assessment and repair phases at 24 Coney Street. Our work included detailed inspections of the roof, ceilings, floors, and basement, identifying historic alterations, structural weaknesses, and areas of concern such as timber decay, fractured beams, and compromised ceiling supports.

We developed tailored repair strategies that respected the building’s Grade II listed status. These included strengthening roof trusses and ceiling joists, consolidating masonry using helical bar stitching, and designing a new jetty support frame. Our interventions were carefully sequenced to minimise damage to historic fabric and were coordinated with conservation officers and specialist contractors.

In addition to structural design, MCA oversaw the specification of materials and workmanship standards, ensuring compatibility with heritage requirements.

Results

The phased investigations and interventions led by MCA have significantly improved the structural stability and safety of 24 Coney Street.

Our conservation-sensitive approach ensured that historic features were preserved while addressing structural historic defects.

The building is now structurally sound, fully refurbished and let to new tenants.