Who to Call Before Buying Land in Northern Virginia

Real estate agents often advise prospective land buyers to call the county to verify important details before a land purchase.

This is good advice, but the county is not a single office.

In Northern Virginia, a land purchase may involve conversations with planners, zoning administrators, health department staff, transportation officials, environmental reviewers, building officials, and utilities personnel.

Each department answers different questions. Calling the wrong office or asking the wrong question can leave buyers believing they have an answer when they really don’t.

Understanding who to contact, what information they maintain, and what they can realistically tell you is an important part of land due diligence.

Why Buyers Sometimes Receive Conflicting Answers

Land due diligence can feel tedious, because different departments evaluate different aspects of the same property. You will never learn everything you need to know from a single call.

For example:

  • The planning department may confirm the zoning district.
  • The zoning administrator may determine whether the parcel qualifies as a legal building lot.
  • The health department evaluates septic suitability.
  • Transportation staff may address entrance permits or access requirements.
  • Environmental reviewers may discuss Resource Protection Areas (RPAs), floodplains, or wetlands.

A buyer who speaks with only one office may walk away with an incomplete picture.

Start With the Right Question

Many buyers begin with the deceptively simple question, “Can I build a house here?”

Unfortunately, this question is usually too broad to produce a meaningful answer.

Instead, buyers should seek to answer more specific questions, such as:

  • Is this recognized as a legal building lot?
  • Does zoning allow my intended use?
  • Are there setbacks that materially limit the building envelope?
  • Has the health department previously evaluated the property?
  • Are there known environmental constraints?
  • What permits or approvals would likely be required?

More specific questions generally produce more useful answers.

What Each Department Typically Knows

Although every jurisdiction is organized differently, responsibilities are often divided in similar ways.

Planning and Zoning

Planning and zoning departments typically answer questions involving:

  • Zoning district
  • Permitted uses
  • Lot area and frontage requirements
  • Setbacks
  • Overlay districts
  • Lot validation or zoning determinations

They generally do not determine septic feasibility or environmental permitting.

Health Department

Health department records often include:

  • Prior soil evaluations
  • Septic certifications
  • Failed perc attempts
  • Existing drainfield approvals
  • Historical applications

These records frequently provide some of the earliest clues about whether a property will support the intended home.

Building Department

Building departments typically maintain information involving:

  • Building permits
  • Existing structures
  • Prior permit history
  • Building code administration

Transportation or Public Works

Transportation staff may address:

  • Entrance permits
  • Sight-distance requirements
  • Road frontage
  • Public road improvements

Whether to direct questions to the county or the state transportation department depends on who is responsible for maintaining the road.

Environmental Agencies

Depending on the jurisdiction, environmental review may involve:

  • Resource Protection Areas (RPAs)
  • Floodplain regulations
  • Stormwater requirements
  • Wetlands
  • Chesapeake Bay Preservation regulations

These constraints often influence where a home can be located rather than whether residential use is permitted.

Public Records Are Often More Valuable Than Phone Calls

Many buyers assume every answer requires a phone call. Often, it does not.

Depending on the jurisdiction, buyers may be able to access online records, including:

  • Previous soil evaluations
  • Septic certifications
  • Building permits
  • Prior engineering submissions
  • Recorded plats
  • County GIS mapping
  • Previous zoning determinations

Sometimes the best first step is reviewing existing documentation in official county records.

County Staff Can Explain the Rules, but They Will Not Make Decisions for You

Another important point is understanding what public agencies generally can and cannot do.

Most staff members are happy to explain applicable regulations and direct buyers to available records.

What they generally cannot do is guarantee an outcome.

For example, they typically will not tell a buyer, “Yes, you can definitely build the house you’re planning.”

Instead, they may explain:

  • The applicable regulations
  • The approval process
  • Information currently available
  • Additional review that may be required

Land development often involves professional judgment, engineering, and formal applications—not just simple yes-or-no answers during a phone call.

County Staff and Consultants Serve Different Roles

Another question buyers frequently ask is whether they should call the county directly or simply hire an engineer or other consultant.

The answer is usually both, but at different stages of the process.

Public agencies administer regulations and explain how the applicable ordinances or policies work. Their role is not to design projects, recommend strategies, or tell buyers whether a property represents a good investment.

Consultants are hired to solve problems.

An experienced engineer, land-use consultant, soil scientist, or environmental professional can often provide practical guidance that goes well beyond what public agencies can offer. Based on experience with similar projects, they may be able to estimate the likelihood of obtaining approvals, identify alternative design approaches, or explain how previous projects have successfully addressed similar constraints.

This expertise can be extremely valuable.

At the same time, buyers should remember that consultants are compensated for performing professional services. In some situations, they may recommend additional studies or engineering that ultimately prove unnecessary because existing public records or an initial conversation with the appropriate agency would have answered the question much earlier.

That does not mean the recommendation is inappropriate. It simply means buyers should understand where they are in the due diligence process.

As a general rule, I encourage buyers to exhaust readily available public information first. If existing records and conversations with the appropriate agencies indicate the property still appears promising, then it often makes sense to engage consultants for more detailed technical analysis.

The goal is not to avoid consultants, but to bring them into the process when their expertise adds the most value.

Every Jurisdiction Works Differently

One challenge for buyers in Northern Virginia is that each locality organizes information differently.

Some jurisdictions provide extensive and easily accessible online records, while others require Freedom of Information Act (FOIA) requests.

Some planning departments issue formal lot validation letters, while others rely on zoning determinations or internal file reviews.

Understanding where information is stored, and how to obtain it, is often just as important as understanding the information itself.

The Goal Isn’t to Get Every Answer

Many buyers approach county conversations hoping to eliminate uncertainty completely.

Unfortunately, this rarely happens. A better objective is to reduce uncertainty.

Each conversation and archived record should answer one piece of the puzzle.

Over time, the individual pieces combine into a clearer understanding of the property’s opportunities and constraints.

The Larger Lesson

“Call the county” remains good advice, but the value comes from asking the right questions, speaking with the right departments, reviewing existing records, and understanding what public agencies can realistically answer.

Successful land due diligence is rarely the result of one phone call.

It is the result of assembling information from multiple sources until the property’s risks and opportunities become clear.

Considering a Land Purchase?

Many of the answers buyers need already exist, but they are spread across different departments, public records, and agency archives.

The Acquisition Risk Review is a consulting-oriented, non-representation service designed to help buyers evaluate Northern Virginia land before committing to a purchase.