Direct answer
Often much of a retrofit can be completed with little or no visible damage by using attics, crawlspaces, closets, existing conduit, baseboards, cabinetry, and carefully selected wireless devices. The answer depends on construction, fire blocks, insulation, masonry, ceiling type, device locations, and performance requirements. Avoiding every opening can force poor speaker placement, unreliable wireless links, exposed wire paths, or equipment that is difficult to service.
A professional walkthrough should compare three options: concealed wired installation with selective repair, a hybrid wired/wireless design, and a no-cut design with its limitations. Agree on permitted access locations and finish expectations before work begins. Small planned patches are often less compromising than designing the entire system around inaccessible framing.
How this answer was prepared
Camelback Smart Homes publishes this FAQ library for homeowners, design professionals, builders and property teams comparing integrated technology. Answers begin with the practical conclusion, then explain the factors that can change it.
Limitations: This is general educational information, not a site-specific design, quote, code determination or compatibility guarantee. Final requirements depend on the property, construction, infrastructure, equipment versions and project goals.