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Know what you can build. Before you buy the lot.

A source-cited feasibility screen across nine factors, in about 20 seconds. Built for buyers, builders, and agents doing pre-offer diligence.

4 min readAnswer verified

What should I check before buying vacant land?

Short answer

Before buying land, verify the intended use against official zoning and overlays, then investigate legal access, utilities, water and wastewater, flood and environmental constraints, terrain, soils, easements, title, and the required approval path. Use a preliminary screen to eliminate obvious mismatches, but keep inspection, survey, title, engineering, and jurisdiction verification contingencies in the purchase agreement.

  1. Define the intended project. Buildability is conditional on what you intend to build, not the parcel alone. 45
  2. Verify zoning and approvals. Confirm permitted use, dimensional standards, overlays, and discretionary review. 45
  3. Investigate site feasibility. Check access, utilities, water, wastewater, flood, terrain, soils, wildfire, wetlands, and contamination. 1235
  4. Review legal and financial records. Order title work and examine easements, deed restrictions, taxes, liens, and recorded approvals. 45
  5. Use qualified professionals. Escalate material unknowns to surveyors, engineers, attorneys, environmental professionals, and planning staff. 45

Sources

  1. National Flood Hazard LayerFEMA (opens in a new tab)

    Official flood-zone, floodway, and flood-elevation screening.

  2. Web Soil SurveyUSDA NRCS (opens in a new tab)

    Official soil properties and building-site suitability screening.

  3. EnviroAtlasU.S. EPA (opens in a new tab)

    Environmental geospatial screening context for site due diligence.

  4. Revitalization-Ready Guide: Reuse AssessmentU.S. EPA (opens in a new tab)

    Official guidance distinguishing environmental and real-estate due diligence, including zoning, liens, encroachments, title searches, engineers, attorneys, and environmental professionals.

  5. Buildability methodologyBuildability

    Preliminary project, zoning, site, legal-record, professional-review, source, and confidence workflow.

Verified guidance · Verified

A Buildability result does not replace a survey, title report, environmental assessment, engineering study, legal opinion, or jurisdiction decision. Verify material findings with the appropriate officials and professionals.

Related questionsIs this lot buildable?What does the zoning allow?How does flood risk affect a site?

A clearer first pass on land due diligence

Use the preliminary screen to decide which issues need official or professional verification.

  1. Enter the parcel address.

    Raw land, infill, or an unincorporated parcel. Any address, its coordinates, or a map or listing link.

  2. Get a preliminary feasibility scan.

    Available evidence is organized across nine factors: zoning, flood, seismic, soil, radon, wildfire, utilities, terrain, and lot geometry.

  3. Decide: go, caution, or walk.

    A plain-English verdict, the flagged risks, and the questions to ask the seller before you commit.

Four things land buyers miss until it is too late

Each one can change feasibility, and each should be investigated before closing.

  • You closed on a lot you cannot legally build on. Setbacks, overlays, easements, and prior approvals can materially reduce the usable building area on a parcel that looks suitable at first glance.

  • The utility hookup quote lands after closing. Mapped water, sewer, and power availability may be incomplete. Confirm capacity, connection points, extension requirements, and provider terms before closing.

  • The approval path differs across jurisdiction lines. Similar zoning labels can follow different application, review, hearing, and approval processes. Permit timing depends on project type, review path, and the governing jurisdiction.

  • Undisclosed wetland or flood designation. Official flood and environmental screens can reveal constraints a listing does not describe. Site-specific verification may still be required.

Parcel area alone does not determine the buildable envelope. Setbacks, overlays, easements, access, and site constraints all shrink it.

Built for anyone about to put money on a lot

Not legal advice. Not a permit guarantee. An early feasibility signal built from public data, so you walk into due diligence asking the right questions instead of discovering the problem after closing.

Data sources: FEMA · EPA · USGS · county parcel layers · municipal zoning ordinances

Questions

What should I check before buying land?

Check the intended use against zoning and overlays, then investigate legal access, water, wastewater, utilities, hazards, terrain, soils, title, easements and the approval path. Use the preliminary findings to prioritize official and professional verification before committing to the purchase.

What are the red flags when buying land?

Unclear legal access, unavailable utilities, restrictions on the proposed use and unresolved site hazards deserve early investigation. Missing information is also an open risk, not evidence that the property is suitable.

How do I check access and utilities before buying land?

Review recorded access rights with the appropriate title or legal professional and confirm service availability with each utility provider. A road or utility line shown nearby does not establish legal access, connection capacity, permission or the cost to connect.

What should I investigate before my land due-diligence deadline?

Prioritize issues that could change your purchase decision: permitted use, access, utility capacity, site constraints, title and required approvals. Track unanswered questions with the responsible professional and confirm your contractual deadlines with your adviser; a preliminary report does not extend them.

What is land due diligence?

It is the investigation performed before acquiring or developing land to test whether the intended project is legally, physically, financially, and operationally feasible.

How is this different from a survey or title report?

A survey addresses boundaries and mapped site conditions; title work addresses ownership and recorded interests. Buildability is a preliminary regulatory and site screen. These products answer different questions and may all be necessary.

Can I use this for rural or unincorporated land?

Yes for a preliminary screen, but county authority, legal access, wells, septic, utility availability, fire access, and sparse public mapping often create additional verification work.

Is this a permit or legal opinion?

No. Keep appropriate purchase contingencies and use planning staff, surveyors, engineers, environmental professionals, title professionals, and land-use counsel for material unresolved issues.

Screen the lot before you sign.

Nine factors, each with its source. Local depth varies by source and jurisdiction.

Score an address

The due-diligence series

See the full seriesProperty due diligence