What Builders Mean by "Lot Basis"

Purchase price is only the starting point

When a builder talks about what a lot 'costs' them, they usually mean more than the number on the purchase contract. Recording fees, title costs, and any prorated taxes at closing all add to the number.

For lots bought well before construction starts, holding costs like property taxes, insurance, and sometimes interest on borrowed funds accumulate during the time the lot sits in inventory, and those costs get folded into basis as well.

Site work and off-site costs count too

Grading, clearing, utility extensions, and any required off-site improvements such as road widening or drainage work are typically added to lot basis rather than treated as separate construction costs, because they are tied directly to making that specific parcel buildable.

This is one reason two lots with the same purchase price can end up with very different total basis once site work is accounted for.

Entitlement and soft costs can matter for raw land

If a builder buys land that still needs rezoning, platting, or engineering approval, the legal, engineering, and application fees spent getting the lot to a buildable state are generally added to basis. This is part of why raw land often trades for less per lot than finished, ready-to-build lots.

Builders who specialize in entitlement work factor this time and cost into their offers on raw parcels, since they are effectively being paid to take on that risk and effort.

Why basis drives the offer a builder can make

A builder generally works backward from expected home sale price to figure out an acceptable total lot basis, then subtracts anticipated site work and soft costs to arrive at what they can offer for the raw purchase price. If site costs are higher, the number left for the seller is lower.

This is why a builder's offer can look lower than a seller expected even when the neighborhood and lot size seem comparable to a recent sale nearby; the underlying basis math may be different.

Basis affects how builders compare lots to each other

When a builder is choosing between several potential lots, they are often comparing total basis per lot rather than just sticker price, since a cheaper lot with expensive site work can end up costing more overall than a pricier lot that is ready to go.

This is why sellers sometimes see builders pass on a seemingly inexpensive lot in favor of a more expensive one nearby that needs less work.

Basis is also a tax and accounting concept

Builders and land investors also use the term basis in an accounting and tax sense, since it affects how gain is calculated when a finished home or lot is eventually sold. The specifics of how basis is calculated for tax purposes vary and should be discussed with a qualified accountant, not assumed from general industry usage.