Before choosing a pergola layout, observe where the sun falls when you expect to use the space. Shade for breakfast and shade for late-afternoon seating are different design goals. Tell us the time of day, the furniture arrangement and whether the proposed structure sits beside the house or farther into the yard. An open pergola should not be assumed to provide a waterproof roof. For decking in an exposed position, compare physical samples and the product guidance rather than choosing only by color. The amount of sun, surface finish and maintenance routine all belong in the material conversation. If you are combining a deck with existing paving, show the level change and where water currently flows. On a sloped site, the support structure needs as much attention as the boards. On an existing deck, note movement, soft areas or damaged connections for review. Send your Contra Costa city and a simple sketch so the initial discussion addresses the actual site, not a generic square-foot assumption.