Renovations run over budget and schedule when conceptual schemes are drafted against assumptions and subsequently retrofitted on site. Every structural adjustment made after selective demolition begins costs exponentially more than the exploratory survey that would have revealed it in advance.
The Non-Negotiable Structural Invariants
Exact identification of load-bearing masonry spines versus secondary partition walls.
Radiographic or exploratory mapping of embedded plumbing risers and electrical mains.
Concrete core testing and moisture penetration mapping of subterranean footing walls.
Chemical composition analysis of original lime mortar to specify compatible repair compounds.
A comprehensive structural survey accelerates the design phase rather than stalling it: it cleanly eliminates the phantom options that were never realistically buildable.