Environmental portrait of Jon and Coby Glennon standing on a high-end residential build site in Rochdale, wearing clean branded gear, overcast North West daylight, 35mm lens.
Environmental portrait of Jon and Coby Glennon standing on a high-end residential build site in Rochdale, wearing clean branded gear, overcast North West daylight, 35mm lens.
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/ Father-and-Son Built

Rochdale-rooted master builders

For over 25 years, J. Glennon Construction has delivered architect-grade house extensions, structural renovations, and premium roofing contractors Rochdale property owners trust.

Close-up architectural shot of flawless slate roofing work on a modern extension, crisp overcast daylight, sharp detail on the hand-cut ridge tiles.
Close-up architectural shot of flawless slate roofing work on a modern extension, crisp overcast daylight, sharp detail on the hand-cut ridge tiles.
Our Services
Our Heritage

Built on on-site accountability

Since 1999, Jon and Coby Glennon have personally overseen every brick laid and structural steel beam positioned. We combine multi-generational heritage with the high-contrast, premium finish of an architectural contractor.

From complex house extensions Rochdale families require to bespoke new builds Greater Manchester developers demand, we manage the entire project pipeline. We provide realistic, itemised quotes and firm structural timelines.

Straight-on architectural elevation of a completed double-storey house extension in Rochdale, featuring flawless brickwork and large glass doors, overcast daylight.
Straight-on architectural elevation of a completed double-storey house extension in Rochdale, featuring flawless brickwork and large glass doors, overcast daylight.
Direct Management

On-site leadership

We do not employ remote project managers. Jon and Coby are on-site daily, working alongside our hand-picked team of certified local bricklayers, roofers, and structural tradesmen.

Jon & Coby Glennon

Jon brings over 25 years of master builder heritage and deep structural expertise, while Coby ensures modern architectural precision and strict quality control across Rochdale, Littleborough, and Manchester.

Serving Rochdale, Milnrow, Wardle, Whitworth, Heywood, Middleton, Oldham, Saddleworth, Bury, and Manchester.

Our Promise

We do not cut corners on structural steel; if our family name is on the sign, the work is built to outlast the mortgage.

No lowball estimates, no mysterious budget blowouts. Just honest, multi-generational master craftsmanship from Rochdale's trusted builders.