

Rochdale-Rooted Master Builders
Jon and Coby Glennon deliver architect-grade house extensions, structural renovations, and master roofing contractor services across Greater Manchester and the North West.
Structural Integrity, Flawless Finish
From complex groundworks to final slate tiling, our family-run team manages every phase of your build with absolute on-site accountability.
House Extensions Rochdale
Roofing Contractors Rochdale
Home Renovations Rochdale
Bespoke structural extensions and new builds engineered to outlast the mortgage, featuring seamless architectural brickwork and steel installations.
Complete slate re-roofs, high-performance flat roof systems, and precision roof repairs executed by certified local tradesmen.
Full-scale structural alterations, load-bearing wall removals, and premium interior transformations across Milnrow, Littleborough, and Saddleworth.
We don’t cut corners on structural steel or timber; if our family name is on the sign, the workmanship is built to stand for generations.
Jon & Coby Glennon, Founders



Our Recent Projects
Real, unedited architectural photography of our master-grade construction and roofing projects completed across Greater Manchester.
Build with Certainty
Get a fully itemised, architect-grade quote with fixed structural timelines for your next project in Rochdale or Greater Manchester.
J. Glennon Construction Ltd
Rochdale-rooted master builders. Father-and-son built to outlast the mortgage.
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Rochdale HQ
Jon: 07454688960
Jon.glennon@hotmail.com
Serving Rochdale, Greater Manchester & North West
© 2026 J. Glennon Construction Ltd-Father-and-son built with on-site accountability.
25-year master craftsmanship