Structural ideas
These are the three mental shortcuts that make the rest of the map easier to navigate.
1. The “owner” changes meaning by delivery model
In a custom home, the human homeowner is usually the active owner from day one. In a built-for-sale project, the builder-developer often plays that role through land, design, permits, and early construction; the end buyer may join later through a sales contract and option selections.
2. Documents are the real handoff points
Needs become sketches; sketches become design development; that becomes construction documents; then permit sets, bid packages, subcontracts, RFIs, change orders, inspections, pay applications, waivers, and closeout records. Most delay and rework comes from document handoffs going fuzzy, late, or out of sync.
Evidence: S3, S4, S5, S7, S8, S9, S10
3. Residential is local by law, fragmented by workflow
Model codes are national, but adoption and amendment happen by jurisdiction. That means one homebuilding process exists in principle, but many local versions exist in practice. Permit portals, checklists, plan review comments, and inspection scheduling are typically local.
Evidence: S11, S12, S13, S30, S31
4. Concealed conditions are the defining risk of renovation
In new construction, you build what you designed on a known site. In renovation, you design around what you find — and you don’t know what you’ll find until you open the walls. Structural rot, outdated wiring, non-code plumbing, moisture damage, mold, lead paint, asbestos, and prior unpermitted work are all common discoveries. Over 50% of homeowners report encountering surprise expenses, and cost impacts from concealed conditions can range from under 5% to over 100% of the original budget. This uncertainty is why renovation requires dedicated Contingency budgets (10–20%), formal change-order protocols, and a decision-tree approach to discovery (stop → assess → determine code triggers → present options → proceed with change order). Pre-renovation assessment by a Home inspector and hazardous-material testing by an Environmental consultant and abatement contractor reduce but do not eliminate this risk.