Resin bound and resin bonded are two different products. A resin bound surface mixes UV-stable polyurethane resin with natural aggregate in a forced-action mixer before trowelling. The stones are fully encapsulated, so the surface is smooth, permeable, and SuDS compliant. A resin bonded surface applies loose aggregate onto a resin-coated base, leaving a rougher texture that is not permeable. For a front driveway over 5 m², the permeable resin bound finish removes the need for planning permission under permitted development rules. Resin bonded does not.
The base underneath matters more than the finish on top. Huntingdon sits on Oxford clay that swells when wet and shrinks when dry, a surface laid without a compacted MOT Type 1 sub-base at the correct depth will crack and puddle within a few winters. Where the existing tarmac or concrete is structurally sound and draining correctly, a resin bound overlay is possible without excavation. Where the base has moved, thinned, or is holding water, a full dig-out is the only option that will hold. That decision is made at survey stage, before any price is agreed.
Cost is driven by four factors: the area size, the condition of the existing base, the drainage specification, and the aggregate blend chosen. Riverside streets near the Great Ouse may need additional channel drainage to meet flood-plain rules. A new-build plot needs sub-base and drainage built from scratch. An overlay on sound tarmac costs less because excavation is not needed. Quoting these as separate line items, excavation, sub-base, drainage, and resin bound finish, means you can see exactly where the money goes and compare quotes on a like-for-like basis.