Plumbing work is invisible once the walls are closed — which is exactly why a detailed proposal matters. It shows the client what they're getting behind the drywall, and protects you from scope creep.
Type of work (remodel, new construction, repair, water heater replacement), property details. Note any existing issues identified during inspection (corroded pipes, low pressure, code violations).
List every fixture, pipe run, and connection. For bathroom remodels: toilet, vanity, shower/tub, supply lines, drain lines. For water heaters: capacity, fuel type, brand, venting. Specify pipe materials (PEX, copper, PVC) and sizes.
Line items: fixture supply and install (each), pipe runs (per linear ft or per run), water heater (unit + install), drain cleaning (per drain), shut-off valve replacement, permit. Show total.
Fixture brands and models, pipe material and diameter, water heater specs (capacity, efficiency rating, warranty). Clients making a $5K+ decision want to know exactly what brands are going in.
Note plumbing code requirements, permit needs, and inspection process. Include your license number. For water heater replacements: expansion tank requirement, PRV compliance, seismic strapping if applicable.
Phase 1: Demo and rough-in. Phase 2: Inspection (if required). Phase 3: Fixture installation and connections. Phase 4: Testing and final inspection. Note water shutoff schedule.