Welcome to San Antonio Land Surveying

San Antonio Land Surveying Posted on by

This site is intended to provide you with information on Land Surveying in the San Antonio, TX and Bexar County area of Texas. If you’re looking for a San Antonio Land Surveyor, you’ve come to the right place. If you’d rather talk to someone about your land surveying needs, please call our local number at (210) 405-7250 today. For more information, please continue to read.

land surveyingLand Surveyors are professionals who make precise measurements to determine the size and boundaries of a piece of real estate.  While this is a simplistic definition, boundary surveying is one of the most common types of surveying related to home and land owners. If you fall into the following categories, please click on the appropriate link for more information on that subject:

San Antonio Land Surveying services:

    1. I need to know where my property corners or property lines are. (Boundary Survey)
    2. I have a loan closing or re-finance coming up on my home in a subdivision. (Lot Survey)
    3. I need a map of my property with contour lines to show elevation differences for my architect or engineer. (Topo Survey)
    4. I’ve just been told I’m in a flood zone or I’ve been told I need an elevation certificate in order to obtain flood insurance or prove I don’t need it. (Flood Survey)
    5. I’m purchasing a lot/house in a recorded subdivision. (Lot Survey – See Boundary Survey if you’re not in a subdivision.)
    6. I’m purchasing a larger tract of land, acreage, that hasn’t been subdivided in the past. (Boundary Survey)

Contact San Antonio Land Surveying services TODAY at (210) 405-7250.

Land Surveying When a Property Has More Than One Road Frontage

San Antonio Land Surveying Posted on by
Aerial view of properties with multiple road frontages for land surveying in San Antonio, Texas

Corner lots and through lots look like a win at first glance. More road frontage can mean better visibility, more access options, and more ways to lay out a building. It also means more boundary lines touching public land, more setback rules, and more chances for a costly mistake. Land surveying gives owners and developers a clear picture of each frontage before they design, buy, or build.

How Multiple Road Frontages Affect Property Boundaries

Road frontage is the part of a property line that runs along a street. A corner lot has frontage on two streets, and a through lot touches streets on opposite sides. Some larger tracts border three roads or more. Each frontage adds a boundary line that meets public land instead of a private neighbor.

Those street-side lines often carry the most uncertainty. Roads get widened, rebuilt, or realigned over the years. The pavement you see today may sit in a different spot than the original road shown on an old plat. A curb or sidewalk is rarely a reliable guide to where private ownership ends.

Corner lots also raise questions where the two streets meet. Some plats show a rounded or clipped corner at the intersection, and that area may belong to the public. A lot survey shows the exact shape of the property, including any corner clip, so nobody plans around land the owner doesn’t control. 

Identifying Right-of-Way Lines Along Each Road

A right-of-way is the strip of land set aside for a road, sidewalk, utilities, and drainage. The right-of-way line marks where that public strip ends and private property begins. On a property with several frontages, a surveyor has to find that line along every road. Each one can have a different width and history.

To locate these lines, the surveyor reviews deeds, plats, and road records from the agency that controls each street. A city street, a county road, and a state highway may each have separate records. The field crew then looks for monuments and other evidence along the property boundary. The finished survey shows each right-of-way line in relation to fences, signs, driveways, and buildings.

Pay close attention to any recorded road widening or future dedication. Some properties have land set aside for a planned road expansion. Ask your surveyor to show those areas if they appear in the records, since they can shrink the usable part of the site.

Reviewing Access Points, Easements, and Setback Requirements

Access Points

An access point is where a driveway connects the property to a street. Properties with more than one frontage may have existing driveways on each road, or none at all. A survey shows where current curb cuts sit and how they line up with the property lines. Rules for adding or moving a driveway can vary by city, county, state agency, and road type.

Easements

An easement gives someone else a right to use part of your land for a set purpose. Frontage areas often hold utility, drainage, or sidewalk easements. A surveyor can plot recorded easements found in research or listed in a title commitment. That drawing helps you see which parts of the frontage are open for use and which are limited.

Setbacks

A setback is the minimum distance a building must stay from a property line. On a corner lot, local rules may treat each street side differently, and some places apply a front setback to both. These rules vary by municipality and zoning district, so confirm them with your local planning office. A survey gives your designer accurate lines to measure from.

Using Survey Data to Plan Site Access

Good site access starts with knowing exactly where you can connect to each road. Survey data shows the frontage lengths, right-of-way lines, existing curb cuts, and nearby features like utility poles, inlets, and signs. Designers use that information to place driveways where vehicles can enter and leave safely.

Elevation data matters too. A topographic survey shows slopes, ditches, and drainage paths along each frontage. A driveway that looks easy on a flat drawing may face a steep grade or a drainage channel in the field. Catching that early can steer you toward the better road for your main entrance.

For commercial sites, access often drives the whole layout. Delivery trucks, customer traffic, and emergency vehicles may each need a different route. Accurate survey data lets your engineer test those options before the design gets locked in.

Surveying Before Development or Property Improvements

Order a survey before you buy, design, or build on a property with multiple road frontages. Work placed past a right-of-way line or inside a setback can lead to permit delays, redesign costs, or removal orders. Early survey work keeps those problems on paper, where they’re cheap to fix.

Depending on your project, you may need one or more of these:

  • A boundary survey to locate property lines and right-of-way lines on each frontage.
  • A topographic survey to show grades, drainage, and existing features.
  • An ALTA/NSPS land title survey when a lender or title company requires one for a commercial deal.
  • Construction staking to mark building corners, driveways, and utilities in the field.

Requirements vary by lender, title company, municipality, and project scope. If a closing, permit, or construction start depends on the survey, ask about timing right away. Older records along busy roads can take extra research.

Frequently Asked Questions

Does a corner lot need a different kind of survey?

A corner lot usually starts with the same boundary survey as any other lot. The difference is the extra right-of-way research for each street. The surveyor may also need to check corner clips and road widening records. That added work can affect cost and timing.

Can I use the curb or sidewalk to find my property line?

Curbs and sidewalks don’t reliably mark property lines. Many properties extend a few feet past the curb, while others stop well short of it. Road projects over the years can shift what you see on the ground. Only a survey based on records and field evidence can show where the line actually is.

Who decides whether I can add a driveway on a second road?

The agency that controls the road usually reviews new driveway connections. That may be a city, a county, or a state transportation department. Each one can have its own spacing and design rules. A survey helps you prepare an accurate request.

How do setbacks work on a property with two street frontages?

Setback rules depend on local zoning, and they vary from place to place. Some areas apply a front setback to both street sides, while others treat one side as a side yard. The rules may also differ for residential and commercial property. Confirm the setbacks with your planning office before you design.

When should I order a survey for a multiple-frontage property?

Order it as early as you can, ideally before you finalize a purchase or a design. Survey findings can change where a building fits or where a driveway can go. Lenders and permit offices may also need the survey before they move forward. Starting early keeps the survey from becoming the hold-up.

Mortgage Survey Questions When the Listing Leaves Out a Shared Access Lane

San Antonio Land Surveying Posted on by
Land surveyor measuring a residential access lane in San Antonio Texas

A mortgage survey can reveal a shared access lane the listing missed. Learn what to check, which easements matter, and what to ask before closing.

The listing photos showed a quiet home at the end of a gravel drive. Then the survey came back, and that drive turned out to be a shared lane crossing two other lots. Surprises like this happen more often than buyers expect, and the mortgage survey is usually where they first appear. If the survey shows shared access that the listing never mentioned, slow down and get clear answers on ownership, easements, and maintenance before your loan moves forward.

This article is written mainly for homebuyers. Real estate agents, lenders, and title companies will also find it useful, since each of them depends on clear access for a smooth closing. The sections below explain what to look for on the survey and which questions to raise early.

What a Mortgage Survey Shows About a Shared Access Lane

On a property with shared access, the survey may show the lane crossing lot lines. It can also label recorded easements, note fences or gates along the lane, and show where the drive meets the public road. These details tell you whether the lane sits on your lot, a neighbor’s lot, or both.

Read the notes and labels, not only the drawing. Surveyors often add notes about easements listed in the title commitment or features that seem to cross boundaries. A short note about a “gravel drive crossing line” can matter a lot.

Comparing the Access Lane With Property and Lot Lines

Start by finding where the lane runs in relation to your lot lines. A lot line is the legal edge of a parcel shown on a recorded plat or described in a deed. The survey should show both the lot lines and the lane so you can compare them.

There are a few common patterns. The lane may sit fully on your lot while neighbors use it to reach their homes. It may sit on a neighbor’s lot while you depend on it for access. Or it may run along the shared line, with part on each side.

Each pattern affects you differently. If others cross your land, you’ll want to know their rights and whether they can widen the lane. If you cross theirs, you need proof you have a lasting right to use it. The survey gives you the map, but recorded documents tell you the rules.

Checking Recorded Easements Behind the Shared Access Arrangement

An access easement is a recorded right that lets someone use another person’s land for travel. It’s usually described in a deed, a plat, or a separate recorded agreement. The title commitment should list recorded easements that affect the property.

Compare the survey with the title commitment line by line. Ask the surveyor to show where each access easement falls and whether the lane actually sits inside it. A lane that drifts outside its easement can create questions for the lender and title company.

Look for a shared driveway or road maintenance agreement too. This document explains who pays for repairs, grading, and gravel, and how decisions get made. Without one, disputes over upkeep can drag on for years.

When No Easement Is Recorded

Sometimes neighbors have used a lane for decades with no recorded document at all. Informal use can lead to unclear rights, and how the law treats long-term use varies by state. A real estate attorney can explain your options, and the title company can tell you how it will handle the issue in the policy.

Questions Buyers Should Raise Before the Mortgage Process Advances

Raise questions as soon as the survey arrives. Waiting until closing week leaves little time to fix gaps. These are good places to start:

  • Who owns the land under the lane?
  • Is there a recorded access easement, and does the lane sit inside it?
  • Is there a written maintenance agreement, and who pays for repairs?
  • Can anyone block, gate, or reroute the lane?
  • Does the lane serve other homes or future lots?
  • Will the lender and title company accept the access as shown?

Send these questions to your agent, title company, and surveyor at the same time. The title company can often explain how recorded documents affect coverage. Your lender can tell you whether the access arrangement meets its loan requirements, which vary by lender and loan type.

Ask the seller for anything they have in writing. Old agreements, letters with neighbors, or repair receipts can help show how the lane has been shared. These don’t replace recorded easements, but they can fill in the history.

When Shared Access Calls for Additional Survey Review

The surveyor may also locate the lane more precisely. They can measure its edges, show how much of it sits on each lot, and note any buildings or improvements near it. That record helps the attorney and title company decide what fixes are needed.

Some situations call for more than a basic mortgage survey. If the lane runs outside its easement, a fence or gate blocks part of it, or neighbors disagree about its location, a full boundary survey may help. A boundary survey locates property corners in the field and compares them to deeds and plats.

Timing matters here. Extra survey work, new easements, or maintenance agreements can take weeks to finish. Talk with your surveyor and title company early so your closing date allows enough time.

Frequently Asked Questions

Can I get a mortgage on a home with a shared driveway?

Many buyers do finance homes with shared driveways. Lenders usually want clear legal access, often through a recorded easement. Requirements vary by lender, loan type, and title company. Ask your lender early how it handles shared access so there are no surprises near closing.

Why didn’t the listing mention the shared access lane?

Listings often focus on features buyers see first, like bedrooms and updates. Sellers and agents may not know the lane’s legal status, especially if it’s been used informally for years. That’s one reason surveys and title reviews matter. Treat the survey as a key source of facts the listing may miss.

What happens if the lane isn’t inside the recorded easement?

The lender or title company may raise an objection or list an exception in the policy. Fixes may include a new easement, an updated agreement, or a corrected legal description. Your attorney and title company can explain which option fits. A surveyor can map the exact difference so everyone works from the same facts.

Elevation Certificate When an Enclosed Patio Becomes Livable Space in a Flood Zone

San Antonio Land Surveying Posted on by
Elevation certificate documenting an enclosed patio and finished floor elevation in San Antonio, Texas.

Closing on a patio feels like a simple upgrade. Add walls, windows and an air conditioner, and you have a new room. In a flood zone, that new room can change how your home is treated for flood insurance and permits.

An elevation certificate is a FEMA form completed by a licensed surveyor. It records the heights of your building and the ground around it, then compares them to the base flood elevation. This article is written for homeowners, and it also helps contractors, lenders and insurance agents who work with them. The main takeaway is simple. Get the surveyor involved before the walls go up.

Why Patio Conversion Can Change Flood Elevation Requirements

A patio conversion can change flood requirements because the new space may count as part of the home’s lowest floor. Flood rules look at the lowest enclosed area of a building. An open patio is often treated differently than a finished room with walls, a door and cooling.

That matters. Creeks like Salado Creek and Leon Creek, along with the river, can rise fast during heavy rain. Many older neighborhoods sit in mapped flood zones, and patios are often built close to the ground.

There is also the 50 percent rule. Under the National Flood Insurance Program, if the cost of an improvement reaches half the market value of the structure, the whole building may need to meet current flood rules. Your local floodplain office decides how this applies. Rules can vary by property, project scope and the date of your flood map.

Before you start, confirm three things:

  • Whether your lot is in a mapped flood zone
  • Whether your project needs a floodplain development permit
  • What the city or county wants to see on paper

Start with the City of San Antonio, or Bexar County if you are outside city limits.

Measuring the New Finished Floor Elevation

Finished floor elevation is the height of the new floor, measured from a known reference point. Surveyors record it in feet, usually to the nearest tenth or hundredth. The number is tied to a vertical datum, which is the standard starting point for all heights on the map.

Patio slabs are often lower than the main house. A step down of six inches or more is common. That small drop can decide whether the space sits above or below the base flood elevation.

The surveyor sets or finds a benchmark near your home, then measures the slab or floor. If the slab is covered by new flooring, tell the surveyor the finish plan. Heights change with tile, wood or underlayment, and the certificate should reflect the real floor.

For the best results, call for a survey once the slab and framing are set, but before drywall and finishes hide the details. Some owners also order an early elevation check to see whether the plan is even allowed.

Documenting Enclosures, Openings, and Adjacent Ground Levels

The certificate does more than list one floor height. It also describes the enclosure and the ground around it. Reviewers use these details to decide how the space should be rated.

Your surveyor will usually record:

  • The lowest adjacent grade, which is the lowest ground touching the walls
  • The highest adjacent grade, which is the highest ground touching the walls
  • Any garage, crawlspace or enclosed area below the main floor
  • Flood openings, which are vents that let water pass through a wall
  • Air conditioners, water heaters and other equipment, plus their heights

Photos are part of the package. Expect front, back and side views, plus close shots of the converted area.

Flood openings deserve extra care. They are meant for enclosures used for parking, storage or access. They are not a way to make a bedroom or den safe. If your new room has vents in the wall, ask your floodplain office and insurer what that means for your case.

Comparing Converted Space With Base Flood Elevation

Base flood elevation, or BFE, is the height floodwater is expected to reach in a flood with a 1 percent chance each year. Your flood map shows it for many areas. The surveyor compares your floor height to that number.

The result falls into one of a few groups. The floor may sit above the BFE, at the BFE, or below it. Local rules may also ask for freeboard, which is extra height added as a safety cushion. That amount can vary by community, so confirm it early.

A floor below the BFE can raise flood insurance costs. It can also block a permit or a lender’s approval. Your insurance agent can explain how the numbers affect your rate.

Some owners are surprised to learn that a room can be built in a way that is allowed, but still costs more to insure. Ask your agent for a quote before you finalize the design. If the numbers look bad, you may be able to change the plan while changes are still cheap.

Updating Elevation Records After the Renovation Is Complete

Once the work is done, the old elevation certificate may no longer match your home. Order a new one that shows the finished building. This is often called a finished construction certificate.

Bring your permit, plans and any earlier certificate to the surveyor. Keep copies for your insurance agent, lender and floodplain office. Store one in your home files as well.

A fresh certificate can help with a few things:

  • Setting the right flood insurance rate
  • Closing out the permit
  • Making a future sale go more smoothly
  • Backing up a request for a map correction, if one applies

If you plan to sell or refinance soon, check the timeline. Lenders and title companies can ask for records on short notice, and survey scheduling takes time.

Frequently Asked Questions

What is an elevation certificate?

It is a FEMA form that records a building’s elevations and compares them to the base flood elevation. A licensed surveyor, engineer or architect completes it. Insurers and local offices use it to rate flood risk.

Do I need a new elevation certificate after enclosing a patio?

Often, yes. The change can alter your lowest floor and your flood rating. Ask your floodplain office and insurance agent, since needs can vary by project and community.

Can I turn a patio into living space if it is below the base flood elevation?

It depends on local rules and your flood zone. Many communities limit or restrict this. Check with the City of San Antonio or Bexar County before you design or build.