Civil Engineering Questions to Ask Before Closing on Development Property

Access Questions

• Does the parcel have documented legal access?
• Is there an existing physical connection, and is it usable for the intended development?
• Where could a new or modified driveway be located?
• Will driveway spacing, roadway classification or access-control requirements limit the concept?
• Are there medians, turn restrictions or intersection conditions that affect inbound and outbound movements?
• Is adequate sight distance likely at the proposed access?
• Is secondary or emergency access required?
• Can delivery trucks, refuse vehicles and emergency equipment circulate without conflicts?
• What agency approvals or offsite improvements may be needed?

Topography and Grading Questions

• How much elevation change exists across the usable site?
• Where are the high points, low points and steep slopes?
• Can the building, parking and entrances be connected with workable grades?
• Are retaining walls likely?
• Is major cut, fill, import or export reasonably likely?
• Could grading extend beyond the parcel or conflict with easements?
• Are existing fills, disturbed areas or geotechnical concerns known?
• Can accessible routes be provided without forcing major layout changes?

Drainage Questions

• Where does stormwater enter the property?
• Where does it currently leave?
• Are offsite flows expected to cross the site?
• Are washes, swales, channels, storm drains or drainage structures present?
• Is onsite retention or detention likely, and where could it fit?
• Is a usable outfall available?
• Do drainage easements constrain the development area?
• Are prior drainage reports or master plans available?
• Could the proposed grading affect neighboring properties or public infrastructure?

Flood-Risk Questions

• Is any part of the property mapped within a flood hazard area?
• Are floodway, special flood hazard or local drainage constraints indicated?
• Do available maps reflect the current site and nearby improvements?
• Could additional survey, analysis, elevation information or agency coordination be needed?
• How would a flood-related constraint affect the proposed building, access or schedule?

Flood mapping is an important screening tool, but site-specific requirements should be confirmed with qualified professionals and the applicable authority.

Utility Questions

• Are public water and sewer actually available to serve the property?
• Where are the potential connection points?
• What line sizes, depths and materials are known?
• Has capacity been confirmed by the provider?
• Will main extensions, offsite work, easements or upgrades be required?
• If sewer is unavailable, is an onsite wastewater approach potentially feasible?
• Where are electric, gas and communications facilities?
• Do overhead or underground utilities conflict with the concept?
• Are relocations or utility verification likely?
• Who owns each system, and what approvals or lead times apply?

Easement and Encumbrance Questions

• Which access, utility, drainage or other easements affect the site?
• Do recorded easements match visible conditions?
• Can buildings, walls, parking or drainage improvements occupy those areas?
• Are there rights-of-way, dedications, shared-access obligations or maintenance agreements?
• Do title, survey and civil concept show the same constraints?
• Are encroachments present, and who is responsible for resolving them?

Parking and Circulation Questions

• Can the intended parking count fit after setbacks, landscaping, drainage and accessible spaces are included?
• Do aisle widths and turning paths work?
• Can fire apparatus and refuse vehicles reach the required areas?
• Is loading separated from customer and pedestrian circulation?
• Are queues, gates or drive-through operations likely to spill into public or internal circulation?
• Can the site connect safely to adjacent parcels or shared drives if required?

Truck-Access Questions

• What design vehicle must reach the site?
• Can it enter, maneuver, load and exit without unacceptable conflicts?
• Are gate setbacks and queuing lengths adequate?
• Will truck movements require pavement, curb or access changes?
• Do overhead clearances, slopes or tight corners create constraints?

ADA and Site-Accessibility Questions

• Can accessible parking connect to each required entrance?
• Can route slopes and cross-slopes be achieved with the existing topography?
• Is a connection to the public way required and physically workable?
• Will curb ramps, landings or transitions conflict with drainage or driveways?
• Are existing accessibility features expected to remain, and are they compatible with the new work?

Existing-Improvement Questions

• Which buildings, pavement, walls, utilities and drainage facilities will remain?
• Are their locations and elevations surveyed?
• Are prior permits, inspections or as-builts available?
• Does the proposed use require removal, reconstruction or upgrading of existing improvements?
• Are there signs of settlement, ponding, erosion or utility distress that warrant investigation?

Public-Improvement Questions

• Will roadway widening, frontage improvements or right-of-way dedication be required?
• Are sidewalk, curb, gutter, streetlight or drainage improvements anticipated?
• Could utility relocation or undergrounding be required?
• Are there adopted roadway or capital projects that affect the frontage?
• Who pays for and constructs the improvements, and what remains unconfirmed?

Entitlement and Civil-Compatibility Questions

• Is the intended use allowed or subject to entitlement action?
• Do conditions of approval impose civil or offsite requirements?
• Can the entitlement concept be served by workable access, grading, drainage and utilities?
• Are density, coverage or parking assumptions based on gross area that includes unusable constraints?
• Which issues require land-use counsel or planning expertise rather than civil engineering?

Prior-Record Questions

• Are previous site plans, permits, review comments or drainage reports available?
• Was a prior application withdrawn, denied or conditioned?
• Do existing plans match field conditions?
• Are neighboring roadway, utility or drainage as-builts available?
• What assumptions in old documents should be reverified?

Cost- and Schedule-Risk Questions

• Which offsite improvements or utility extensions could materially affect cost?
• Could retaining walls, import/export, stormwater facilities or traffic control be significant?
• What surveys, studies, permits or agency meetings are still needed?
• Which third-party approvals have long or uncertain lead times?
• What design decisions depend on information that will arrive after closing?
• Is the purchase model carrying reasonable allowances for unresolved civil work?

Questions for the Seller

• What development, permit, survey, utility or environmental records exist?
• Have access, drainage, utility or boundary disputes occurred?
• Were prior plans submitted to an agency?
• Are there maintenance agreements, shared facilities or pending public improvements?
• Can the seller authorize access for survey or investigation during due diligence?

Questions for the Civil Engineer

• What constraints are confirmed, and what remains an assumption?
• Does the intended program appear to fit at a preliminary level?
• Which missing information could change the conclusion?
• What additional survey, records, agency input or specialty study is recommended?
• Which risks affect feasibility versus cost, schedule or layout efficiency?
• What should be resolved before closing, and what can reasonably remain for design?

Before the Due-Diligence Period Expires

• Document the intended use and tested concept.
• Obtain and review survey and title information appropriate to the decision.
• Confirm the status of access, utilities, drainage and flood information.
• List required public improvements and agency decisions.
• Identify unknowns, responsible parties and next actions.
• Translate material unknowns into decision, contract, budget or schedule considerations.
• Keep the final risk summary with the transaction record.

Printable-Style Final Checklist

• □ Access is documented and physically workable for the intended use.
• □ Boundaries, easements and rights-of-way are understood.
• □ Topography and likely grading implications were reviewed.
• □ Drainage paths, stormwater needs and flood screening were considered.
• □ Utility availability, connection assumptions and extensions are documented.
• □ Parking, circulation, loading, fire and truck movements were tested.
• □ ADA/site-accessibility constraints were considered.
• □ Existing and required public improvements are identified.
• □ Prior records and agency information were reviewed where available.
• □ Remaining unknowns have owners, next steps and decision consequences.

When to Involve a Civil Engineer

Civil review should occur before the buyer loses the practical ability to investigate or respond to material constraints. The appropriate scope may range from a records-and-concept review to preliminary engineering and agency coordination. The goal is not to promise development success; it is to give the buyer a clearer technical basis for the closing decision.

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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