Ground, water and winter in Bellefontaine Neighbors
This part of north county is loess upland, and the county soil survey says local roads and streets on many of these soils need adequate base material plus ditches and culverts to prevent damage from low strength and frost action. Clay subsoil holds water and winter freezes it. Grading and compaction are the defense.
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 Bellefontaine Neighbors estimate is sized to the soil, the traffic and the drainage on your property.