| Access and frontage | Evidence to obtainRecorded access, frontage, driveway or road standards, right-of-way, shared-road obligations, and improvement requirements. | Who should verifyTitle, survey, civil engineer, and the city, county, highway district, or transportation agency with authority. |
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| Water and sewer | Evidence to obtainProvider, service boundary, available capacity, connection location, extension needs, fees, pressure, and timing. | Who should verifyServing utility, municipality or district, and civil engineer; obtain written project-specific information when material. |
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| Well and septic | Evidence to obtainWell records, water quality and yield review, soils, site evaluation, reserve area, system type, and subdivision sanitary requirements. | Who should verifyPublic health district, IDWR records, licensed well or septic professionals, engineer, and environmental specialists as needed. |
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| Irrigation and water rights | Evidence to obtainDistrict service, assessments, delivery point, ditches and easements, appurtenant rights, priority, use, transfer, and project demand. | Who should verifyIrrigation entity, IDWR, title, survey, certified water-right examiner, engineer, and legal counsel when appropriate. |
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| Topography, soils, and drainage | Evidence to obtainContours, slopes, geotechnical conditions, expansive or collapsible soils, groundwater, stormwater route, and grading limits. | Who should verifySurveyor, geotechnical professional, civil engineer, and reviewing agencies. |
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| Floodplain and environmental | Evidence to obtainEffective flood maps, local overlays, wetlands indicators, prior use, environmental records, and any mitigation or study requirement. | Who should verifyLocal floodplain administrator, FEMA data, environmental consultant, wetlands specialist, engineer, and counsel. |
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| Title and private constraints | Evidence to obtainEasements, liens, reservations, CC&Rs, plat notes, development agreements, mineral interests, encroachments, and access rights. | Who should verifyTitle officer, surveyor, attorney, engineer, and the parties holding relevant rights. |
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| Dry utilities and fire | Evidence to obtainPower, gas, communications, relocation or undergrounding, fire flow, emergency access, hydrants, and district requirements. | Who should verifyUtility providers, fire authority, civil engineer, and project design team. |
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| Concept yield | Evidence to obtainGross and net acreage, rights-of-way, open space, setbacks, stormwater, utilities, circulation, parking, lot or unit standards, and marketable product. | Who should verifyPlanner, civil engineer, architect, surveyor, land-use counsel, jurisdiction, and builder cost and sales teams. |
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