Access, condition, and site factors
Concealed damage, restricted access, an occupied residence, ceiling heights, slope, landscaping, and finish protection each affect labor time and job sequencing.
Scope and material specifics
A proposal should spell out repair limits, system capacity, compatible materials, disposal, testing, and restoration work.
Permits and specialty input
Some scopes require permits, inspections, engineering review, environmental testing, or specialty subcontractors -- verify requirements with the provider and local authority.
Figures here are not offers. Request a written, property-specific scope and quote before proceeding.