Why the base matters in Richmond Heights
Upland soils across the county formed in loess over clay, and the county soil survey lists low strength and frost action as limits for local roads, calling for adequate base plus ditches and culverts. In a built-up city the ditches are storm inlets, but the principle holds: get water off and out of the base before winter works on it.
Bids are only comparable when they spell out the same things: base depth, compacted thickness, how edges are finished, and where water is meant to go. Ask for those before you pick a number.
Compacted asphaltTypically 2 to 3 in. for a car drive
Stone baseTypically 4 to 8 in., compacted
Drive on itUsually 2 to 3 days, longer in heat
First sealcoatTypically 6 to 12 months after paving
Typical ranges. Your Richmond Heights estimate is sized to the soil, the traffic and the drainage on your property.