The Custom Home Land Due-Diligence Checklist: 50 Questions Before You Close

A land feasibility review should not end with “the county says it is buildable.” That statement may mean only that residential use is allowed somewhere on the parcel. It does not tell you whether the intended home fits, whether the driveway works, whether utilities are affordable, whether the soil supports the foundation, whether septic consumes the best part of the site, or whether the total developed cost still makes sense. The following checklist is designed to create disciplined questions for the professionals and agencies involved. It is not a substitute for local legal, design, engineering, survey, environmental, or construction advice.

At a glance: Organize due diligence into ownership and access, land-use rules, physical site conditions, water and wastewater, utilities, hazards, cost, schedule, and the resulting home concept.

Ownership, title, and access questions

Who owns the property, and is the legal description consistent across deed, tax records, and survey? What easements, restrictions, mineral rights, leases, liens, encroachments, shared roads, maintenance agreements, or access rights affect it? Is access public, private, recorded, physically constructed, and acceptable to the jurisdiction, lender, fire authority, utility providers, and construction team? Are boundary corners visible, and do neighboring improvements appear to cross the line?

Land-use and design-control questions

What zoning district applies? Which uses, accessory buildings, home occupations, guest units, livestock, short-term rentals, or future subdivision are allowed? What are the front, side, rear, water, road, septic, well, utility, and environmental setbacks? How are lot coverage, impervious cover, floor-area ratio, height, stories, grading, tree protection, and architectural review calculated? Are variances possible, and should the project depend on receiving one?

Physical, utility, and hazard questions

What do survey contours, drainage patterns, soils, rock, groundwater, wetlands, flood maps, landslide data, wildfire exposure, wind conditions, trees, and neighboring grades suggest? Where are electric, gas, water, sewer, communications, and storm infrastructure, and what capacity, easements, extensions, tap fees, meters, transformers, pumps, or upgrades are required? If using well and septic, where are primary and reserve areas, how do they affect the plan, and what testing remains?

Cost, schedule, and concept questions

What will clearing, erosion control, grading, retaining, foundation adaptation, driveway, drainage, utility work, well, septic, fire access, off-site improvements, permits, impact fees, and restoration cost? Which studies have long lead times? What conditions must be resolved during the contract period? Does a preliminary site concept show the intended home, outdoor spaces, garage, parking, septic, well, utilities, and access working together? What is the walk-away threshold if the evidence changes?

The 50-question field checklist

Use the following as a starting list and assign each question to a source of truth. Do not allow “probably” to become a permanent project assumption.

• Is the legal description verified?

• Is legal and physical access confirmed?

• Are there shared-road obligations?

• What title exceptions affect use?

• Are there easements or encroachments?

• What zoning and overlay districts apply?

• What are all applicable setbacks?

• How is lot or impervious coverage calculated?

• Are height and story limits compatible with the concept?

• Are accessory structures or guest units allowed?

• What HOA or deed controls apply?

• Is architectural review required?

• Is subdivision or lot-line work pending?

• Is a current boundary and topographic survey available?

• Where is the practical buildable envelope?

• What are the slope and drainage patterns?

• Are retaining walls likely?

• Is shallow rock or difficult excavation expected?

• What soil information exists?

• Is geotechnical exploration recommended?

• Are wetlands or protected areas present?

• What flood zones or drainage easements apply?

• What wildfire exposure and fire-code requirements apply?

• What wind, coastal, seismic, or landslide risks apply?

• Which trees are protected or expensive to remove?

• Where are electric service and transformer capacity?

• Is natural gas available?

• Is public water available and at adequate pressure?

• Is public sewer available and at usable elevation?

• What utility extension and tap fees apply?

• Is a well allowed and likely to be productive?

• Has water quality been considered?

• Has septic soil or perc testing been completed?

• Where are primary and reserve drainfields?

• How do well and septic setbacks affect the plan?

• Can the driveway meet grade, width, sight-distance, and fire access rules?

• Can construction vehicles and cranes reach the site?

• Is temporary power and water available?

• Are off-site road or utility improvements required?

• What impact, permit, school, park, or utility fees apply?

• What grading and erosion-control approvals are required?

• What insurance constraints may affect the project?

• Will the lender accept the site and proposed improvements?

• What studies remain and how long will they take?

• What site work is excluded from early estimates?

• What contingency is appropriate for unknown conditions?

• Does the intended home fit without a variance?

• Do the best rooms capture the intended views and light?

• Does the total developed-site cost support the project?

• What finding would cause you to renegotiate or walk away?

The Builder Concierge point of view

The checklist is valuable only when it produces a decision record. Builder Concierge recommends tracking every item as confirmed, assumed, pending, not applicable, or unacceptable, with the supporting document and responsible professional attached. That turns due diligence from a pile of emails into a defensible project profile.

Before releasing the land contingency

• Review all due-diligence findings with the relevant professionals

• Update the preliminary site concept

• Update the site-work and all-in budget

• List unresolved conditions and their financial exposure

• Confirm financing and insurance implications

• Decide whether any variance or approval risk is acceptable

• Document renegotiation requests or required seller actions

• Make a clear proceed, extend, renegotiate, or terminate decision

Frequently asked questions

Is this checklist the same in every state?

No. Property law, disclosure, zoning, environmental rules, utilities, water rights, septic regulation, surveys, contracts, and permitting vary substantially. Use the list to organize questions and obtain local advice.

Can an online map replace a survey?

No. Public GIS, satellite, flood, and soil maps are useful screening tools, but boundaries, easements, elevations, improvements, and other conditions may require a professional survey and additional studies.

How much should land due diligence cost?

It depends on the parcel and required work. Spending on survey, engineering, soil, septic, title, legal, and construction review can protect a far larger land and building investment. The scope should reflect the property’s risk.

What if some answers cannot be obtained before closing?

Identify the uncertainty, estimate the exposure, determine whether the contract can be extended or conditioned, and decide whether the risk is acceptable. Do not quietly convert an unknown into a certainty.

Your next step

Use the Builder Concierge Home Planner to turn your priorities into a structured home vision, then carry that same project record into property, design, budget, and pre-construction decisions. Start your Home Vision Profile.

Related reading

• How to Buy Land for a Custom Home

• Which Land Survey Do You Need?

• Soil Tests and Geotechnical Reports

References

• FEMA, Understanding Flood Risk

• USDA NRCS, Web Soil Survey

• U.S. EPA, New Homebuyer’s Guide to Septic Systems

• U.S. Geological Survey, Landslide Hazard Maps

• Wildfire Risk to Communities, Understand Risk

Builder Concierge publishes educational planning content for prospective custom-home buyers. Costs, codes, financing, site conditions, and professional requirements vary by jurisdiction and project. Concept plans and renderings are not construction documents and require review by appropriately licensed professionals.