Welcome to San Jose Land Surveying

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Your Final Stop for ALL of Your Survey Needs!                                         Contact us today for a free quote!

This site is intended to provide you with information on Land Surveying in the San Jose, CA and Santa Clara area of California. If you’re looking for a San Jose 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 (669) 221-8684 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 Jose 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 Jose Land Surveying services TODAY at (669) 221-8684.

Due Diligence Survey Considerations Before Buying an Older Silicon Valley Office Building

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Older office building reviewed during a due diligence survey before purchase in San Jose California.

Older office buildings across Silicon Valley are getting fresh interest from buyers. Some want to convert them. Some want to fix them up. Some just want to hold onto them for a long time. The building itself might look like a great find. But the land underneath it often holds years of history that a listing sheet will never tell you.

A due diligence survey digs up that history before you sign anything. Due diligence means checking things carefully before a deal closes. This survey confirms the property lines. It confirms easements, which are legal rights for someone else to use part of the land. It also confirms other site facts and limits that affect what you can actually do with the property.

In older business buildings sit next to decades of tech growth and changing zoning rules. This kind of check has become a normal part of buying an office building.

Survey Factors to Review Before Acquiring Older Office Buildings

Check a due diligence survey before you close on any older office building. This matters most if you plan to fix it up or use it in a new way. Older buildings often have conditions you cannot see just by walking through or reading a listing.

What a Due Diligence Survey Typically Covers

Before you buy an older office building, your survey should confirm:

  • The exact property lines and any encroachments, which are parts of a building or fence that cross onto someone else’s land
  • Recorded easements that affect access or utilities
  • The building’s shape and how far it sits from the lot lines
  • The zoning type and what uses are currently allowed
  • Parking counts and other things already built on the site

This information gives buyers real facts to use when they negotiate the purchase. It is much better than guessing based on the listing or a quick visit.

Why Silicon Valley’s Older Office Stock Deserves Extra Scrutiny

Many office buildings were built during earlier years of tech growth. This was decades before today’s zoning and building rules took shape. Over the years, people added new parts, expanded parking, and upgraded utilities. These changes are not always fully written down in city records. A due diligence survey helps close that gap before you own the property.

How Existing Conditions Affect Commercial Property Due Diligence

The facts about a site right now shape almost every choice a buyer has to make about an older office property. A due diligence survey writes down these facts in enough detail to judge the building’s real potential.

Structural and Site Conditions Worth Confirming

Buyers looking at an older office building should check whether the property shares any walls, foundations or equipment systems with the building next door. This happens more often in busy parts of San Jose than buyers expect. It can strongly affect renovation plans that change the building’s structure.

Utility and Infrastructure Conditions

Older buildings sometimes use utility systems that have not been upgraded to handle today’s needs. This matters even more for properties being considered for heavier use, like a lab or life sciences space. A due diligence survey shows existing utility easements and hookups. This gives buyers a clearer picture of what upgrades might be needed.

Identifying Site Constraints During Office Building Evaluations

Site limits can stop a buyer from doing what they want with an older office property, even when the building itself looks like a great fit for a new project. A due diligence survey finds these limits early, before they become a problem during design or permitting.

Common Constraints Found on Older Properties

Limits that often turn up during due diligence include:

  • Setback rules that limit how much you can expand
  • Easements that block where new construction can go
  • Parking counts that fall short of current zoning rules
  • Flood zone or drainage issues tied to older stormwater systems

Why Zoning Confirmation Matters for Office Conversions

San Jose has seen more interest in turning older office buildings into other uses. This includes homes and life sciences space. A due diligence survey, paired with a zoning check, helps buyers see whether their planned use is actually allowed. It also shows whether they would need a rezoning or a special exception first.

Survey Data That Supports Renovation and Redevelopment Plans

Survey data becomes the base that architects and engineers use to design renovation plans that truly fit the site. Without this data, early design work risks being built on guesses that do not match the property’s real conditions.

Working With Architects and Engineers Early

Share your due diligence survey with your architect or engineer before you finish your design ideas. This helps them plan around the real property lines, easements and building structure. It lowers the risk of a design that has to be redone once construction plans are further along.

Supporting Realistic Project Budgets

Correct site information also helps you build a realistic project budget. A renovation plan built around confirmed facts is far less likely to run into the kind of mid-project surprises that raise costs and slow things down.

Reducing Investment Risks With Accurate Property Information

Correct property information lowers the risk that comes with buying an older office building. An ALTA Survey completed during due diligence gives buyers, lenders, and title companies a chance to identify potential issues before closing. It can reveal boundary questions, easements, encroachments, access concerns, or other site conditions that may affect the property’s value or future plans. 

Without this information, buyers risk finding boundary disputes, unresolved easements or zoning conflicts only after they already own the building. Fixing these problems later costs a lot more time and money.

Rules for due diligence surveys can change by lender, title company, property type and city. If your purchase timeline depends on closing by a set date, confirm your survey needs and timeline with a local surveyor as early as you can.

Frequently Asked Questions

What is the difference between a due diligence survey and an ALTA survey? 

The two terms are often used together. A due diligence survey for a commercial deal often follows ALTA standards. An ALTA survey is a specific, nationally known format. Lenders and title companies often require it as part of commercial due diligence.

Why does an older office building need more survey attention than a newer one? 

Older buildings tend to have more history that may not be fully written down in current records. This can include additions, shared structures and old utility hookups. A thorough survey helps bring these details to light before they affect your ownership or renovation plans.

Can a due diligence survey affect the purchase price? 

Yes. If a survey finds an unresolved easement, encroachment or other site issue, buyers can use that finding to negotiate the price. They can also ask the seller to fix the issue, or change the terms of the purchase agreement.

Property Survey Considerations for Adding More Homes to a Lot

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Licensed land surveyor performing a property survey on a San Jose residential lot before planning an additional home, documenting lot boundaries, existing structures, and backyard space

Homeowners in San Jose keep asking whether they can fit another home on their lot. It’s a fair question, and the answer starts with real numbers. Land is tight in the Bay Area, and adding a unit on an existing lot has become a common way to make room. Before an architect draws anything, a property survey gives the whole team facts to work from. It shows what the lot actually is and what already sits on it.

This piece walks through what a property survey does at this stage, and where its job ends.

Treating the Existing Parcel as a Multi-Home Site, Not Just a Large Backyard

That open grass behind the house is not automatically build-ready. It can look wide and empty while the usable part is much smaller. A property survey measures the true lot lines, the shape and the size. It also plots where the current house and other features stand.

Lot lines rarely sit exactly where a fence or a hedge suggests. A few feet in either direction can change how much room a second home really has. Those numbers matter once a duplex, a triplex or a backyard unit enters the plan. A designer needs the exact edges before sketching a second home. Guessing from a fence line or an old deed can push a plan the wrong way.

Documenting Every Existing Structure Before an Infill Layout Takes Shape

A property survey locates the main house, the garage and every built feature so the design starts from fact, not memory. That base plan is what an architect builds on.

The survey plots the main residence and its exact spot on the lot. It also picks up the garage, sheds, decks, driveways, retaining walls and other visible features. Each one takes up room and shapes where a new home can go. A retaining wall or a long driveway can eat into space you thought was open. With everything drawn to scale, the team can see how a new unit might fit around what’s already there.

San Jose’s own process points the same way. The City’s ADU Universal Checklist (Bulletin #210) asks for lot measurements and the location of all existing buildings and trees before plans move ahead. A property survey lines up with that request.

Looking Beyond the Main House Footprint for Space That Is Already Committed

Some things claim space even though they aren’t buildings. A property survey helps the team spot them early.

Recorded easements are a big one. A utility or drainage easement can run across the yard and limit what sits on top of it. Shared access strips, setback areas near the lot line and existing site features all take a share of the lot too. Large trees can matter as well. San Jose asks for their location because a protected tree can shape where a unit sits. None of these show up as a wall you can see, yet they still change a layout.

The survey’s job here is to record what’s there. It does not promise that a certain spot is buildable. It gives the team a clear map so they can weigh options with real limits in view.

Mapping Shared Access Early for a More Workable Residential Layout

When a second home shares the driveway or walkway with the first, access needs a close look up front. A property survey shows the current routes with real measurements.

A new unit often leans on the same driveway, parking, walkway or service line as the original home. When the survey captures where those run today, the team can plan around them instead of guessing. A shared route that felt fine for one home can get tight when two homes use it every day. Width, slope and where a route meets the street all affect what works. The survey gives the facts. City rules and the final design still decide what’s allowed and what has to change.

Separating Survey Facts From Zoning and Permit Decisions

Here is the part people mix up most. A property survey measures the site. It does not set how many homes the lot can hold.

The survey won’t approve a duplex or a triplex. It won’t stand in for City review, and it won’t tell you your zoning. What it gives you is solid site information the rest of the team can rely on.

San Jose often allows a single-family lot one ADU plus one junior ADU, with the junior unit under 500 square feet and built inside the home. State rules commonly set a 4-foot side and rear setback for a new detached ADU. Numbers like these shift, and they depend on your exact lot. Confirm your zoning, any state-law pathways, permit steps and utility needs with San Jose Planning before you count on a layout. You can reach a planner at 408-535-3555. Pair that City input with your survey, and the plan stands on real ground.

Building Between Two Existing Structures Leaves Inches, Not Feet, for Error

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Extremely narrow passage showing limited clearance between two existing brick buildings.

An infill lot in a dense block offers no margin. A construction survey has to place a new building between two structures that already stand there, with clearances measured in inches and no space to set the usual references. Every part of the job runs tighter than it would on open ground. The neighbors, the sidewalk and the street all press in on the work zone at once.

Establishing Control Where Conventional Offsets Are Limited

On a normal site, control points sit well outside the building and stay put. That option disappears when the lot line runs a few feet from the foundation and the sidewalk starts right after it. Crews adapt by setting control in places most projects would never use.

Reference points go on neighboring walls, on curbs, on utility poles and on protected points across the street. Each one gets measured into the network carefully, since a control point on a building can move if that building moves. Crews recheck those references through the job rather than trusting them once and walking away.

Relating the New Foundation to Both Neighbors

The new structure has to fit between two buildings that were not built to modern tolerances. One may lean. Another may have a foundation that pushes past its own property line. The survey measures what actually exists rather than what the plans assumed.

Those measurements drive real decisions. A party wall condition, a shared footing or a neighbor’s projecting bay can each change where the new foundation goes. The crew documents the clearances on both sides and reports them before excavation starts, since a design that assumes a clean lot line needs to know the truth early.

Transferring Layout Into a Deep Excavation

Many infill projects dig deep for parking or basement space. Layout has to travel down into that hole and stay accurate, which is harder than it sounds. The surface control sits above, the work happens below, and the shoring in between blocks most of the sight lines.

Crews transfer control down using plumbed points, total station setups and repeated checks against the surface network. Vertical control gets the same treatment, since a slab poured at the wrong depth affects every floor above it. Each transfer gets verified independently rather than accepted the first time.

Monitoring Position Through Structural Progress

A tall, narrow building magnifies small errors. A column that starts a half inch off plumb at the base can miss its target by several inches near the top. Surveyors check walls, columns and slabs as the structure rises, so the frame stays inside tolerance floor by floor.

Neighboring buildings often need watching too. Excavation and shoring can move nearby structures slightly, and many cities require monitoring points on adjacent walls. Readings taken through the job give everyone an early warning while the response still costs a phone call rather than a lawsuit.

Preserving a Clear Record of Critical Measurements

Tight sites produce disputes. A neighbor claims the new wall crowds the line. An inspector questions a clearance. A contractor argues about who moved what. Good survey records answer those questions with dates, measurements and a clear chain back to the control network.

Field notes and verification surveys carry that weight. They show what stood on the ground before work started, what got built and how each measurement traces to a known reference. That record protects the owner, and it usually settles arguments faster than anything else in the project file.

Frequently Asked Questions

Can a surveyor measure a neighboring building without entering the property?

Much of it, yes. Modern instruments measure surfaces without touching them, so a crew can locate a wall face, a roof edge or a foundation line from within the project site. Work that requires access to the neighbor’s land needs their permission, and that conversation should happen early.

What happens when the existing buildings do not match the recorded lot lines?

The survey shows both, and the difference becomes information the project team has to deal with. An encroachment may call for a legal agreement, a design change or a discussion with the neighbor. The surveyor documents the condition and leaves the ownership question to an attorney.

How often should a tight infill site be checked during construction?

More often than an open site. Checks after excavation, after foundation work and at each major floor level catch drift while correction stays practical. The right schedule depends on the structure, and the project team should set it before the first pour.