What to Review Before Buying a Commercial Development Site

Begin With the Intended Use

Civil feasibility depends on what the buyer intends to build. A small office, drive-through use, warehouse, retail center and outdoor-storage operation can place very different demands on access, parking, loading, fire circulation, grading and utilities. Before reviewing the property, define the approximate building footprint, site program, parking demand, loading areas, truck movements, outdoor uses, phasing and possible expansion.

The concept does not need to be a finished site plan. It should be specific enough to test whether the parcel can reasonably support the operation after setbacks, easements, drainage facilities, public improvements and circulation are considered.

Property Boundaries, Survey and Title

A current boundary and topographic survey is one of the most useful due-diligence inputs. It should be coordinated with title information so the team can understand parcel boundaries, rights-of-way, access easements, utility easements, drainage easements and visible encroachments. A recorded easement may reserve land that appeared usable in an aerial image. An access easement may establish a legal right without confirming that the physical connection meets current agency standards.

• Confirm that the parcel description matches the property being evaluated.
• Locate existing improvements, fences, walls, drainage features and utilities where survey scope allows.
• Identify easements that cross proposed building, parking or drainage areas.
• Determine whether additional ALTA, legal-description or title coordination is needed for the transaction.

Access: Legal Is Not the Same as Practical

A parcel may touch a public road yet still have limited practical access. Review potential driveway locations, roadway classification, access-control requirements, spacing from intersections, median restrictions, sight-distance conditions and turn restrictions. Emergency access and fire-apparatus circulation may affect the site layout. Industrial and logistics uses should test truck turning, gate queuing, loading circulation and conflicts with passenger vehicles.

Agency coordination may be needed before a driveway concept can be relied upon. Due diligence should clearly separate confirmed information from assumptions that still require agency review.

Topography and Grading

Existing grades influence nearly every part of site development. Elevation differences can affect building pads, accessible routes, driveway slopes, retaining walls, earthwork balance, drainage outlets and utility depths. A site that looks level from the road may contain meaningful cross-slope or a low area that controls the grading strategy.

The objective is not to complete final grading during due diligence. It is to identify whether major cut or fill, walls, imported material, export, unusual transitions or difficult accessible routes are reasonably likely and should be reflected in the purchase decision or early budget.

Drainage and Flood Information

Review where stormwater enters the property, how it crosses the site and where it can leave. Consider offsite flows, existing washes or swales, recorded drainage easements, available storm-drain systems, potential outfalls and likely onsite retention or detention needs. Floodplain mapping is an important screening source where applicable, but mapped information does not replace site-specific review.

A workable drainage strategy must fit with the building, parking, access, grading and utilities. Reserving space for stormwater late in design can force major layout changes. Existing reports, drainage studies, roadway plans and nearby as-builts can clarify conditions, but their applicability and reliability should be checked.

Utilities: Presence Does Not Confirm Service

Seeing a water line, sewer manhole or utility marker near the property does not establish available capacity, acceptable connection points or affordable service. Review water, sewer, electric, gas and communications information as relevant. Consider line size, depth, distance, capacity, extension requirements, service jurisdiction, connection constraints and potential conflicts.

Where sewer is not available, evaluate whether an onsite wastewater approach is potentially feasible and which approvals or studies may be required. Utility potholing or other verification may be appropriate later when critical elevations or conflicts cannot be confirmed from records.

Parking, Circulation and Loading

Prepare an approximate fit test using the intended use. Include parking stalls, drive aisles, fire access, loading areas, refuse service, truck movements, pedestrian connections and site entrances. A raw acreage calculation can overstate developable area because it ignores geometry, easements, drainage and circulation. Test the difficult movements early—especially delivery trucks, emergency vehicles and drive-through queues where relevant.

ADA and Site Accessibility

Accessible parking and routes depend on both layout and grading. Review whether an accessible path can connect parking, the public way and building entrances without creating impractical slopes or cross-slopes. Steep sites, elevated entrances, long routes and constrained frontage can materially affect the civil and architectural concept.

Public Records and Existing Approvals

Search for prior site plans, permits, drainage reports, utility plans, roadway projects, subdivision records, development agreements and as-builts where available. Records can reveal previous constraints, proposed improvements or agency expectations. They should be treated as evidence to evaluate—not proof that a new proposal is approved or that old conditions remain unchanged.

Civil Feasibility Is Not Zoning Approval

Zoning and entitlement determine whether a use may be allowed and under what land-use conditions. Civil feasibility evaluates whether the physical site and infrastructure can support that use. The two are connected, but neither substitutes for the other. A use may be permitted while access, drainage or utility improvements make the concept difficult. Conversely, a site may be physically workable but require entitlement action.

Questions to Answer Before Closing

• What specific use and approximate site program are being tested?
• Are parcel boundaries, easements and rights-of-way understood?
• Is access both legally available and practically workable?
• What grading, retaining-wall or earthwork issues are likely?
• Where does stormwater enter, move through and leave the site?
• What retention, detention or outfall constraints may apply?
• Which utilities are available, and what remains unverified?
• Can parking, loading, fire access and truck circulation fit?
• Can accessible routes work with the site grades?
• Which public improvements, permits or agency decisions may affect cost or schedule?
• What records are available, and which critical facts still require survey, utility, geotechnical or agency confirmation?

When to Involve a Civil Engineer

Civil input is most valuable while the buyer still has time to investigate, revise the concept, negotiate terms or decline the property. A focused review can identify known constraints, define assumptions and recommend the next level of survey, records research, agency coordination or preliminary engineering. It cannot eliminate every development risk, but it can make the remaining risks explicit before closing.

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Professional Note

Requirements vary by jurisdiction and project. This article provides general engineering guidance and is not a substitute for project-specific review of applicable codes, standards, records, surveys, geotechnical information, utility information or agency requirements.

Sawan Dhaliwal, PE
Licensed Civil Engineer — AZ | CA | MO