30/09/2026
Hidden Scope Behind Renovation Works
Overtime, renovation projects have taught me that some of the most important BOQ items are often the ones that are not immediately obvious on the drawings.
Preparing Bills of Quantities (BOQs) for renovations is quite different from just preparing one for new works. For new construction, we largely measure what is going to be built. For renovations, we must first understand what already exists, what stays, what goes, what can be reused, what needs alteration and what needs making good.
This is why a thorough site inspection and condition assessment is critical before measurement. A Quantity Surveyor should pay particular attention to demolition and disposal, making good disturbed finishes, existing services requiring isolation, protection of works to remain, temporary works, access restrictions and matching existing finishes.
One common mistake is pricing renovation works as though they were new works. Replacing 40m² of ceiling for example, is rarely just the cost of 40m² of new ceiling. There may be dismantling, protection of surrounding finishes, interference with existing services and making good afterwards.
Another mistake is relying too heavily on drawings. Renovation drawings may not capture the actual condition of the building or everything concealed behind walls, ceilings and floors. Where information is uncertain, the BOQ should make the assumptions and appropriate allowances clear rather than leave them to become disputes later.
A good renovation BOQ should clearly tell the whole story.
