Structure & foundation
Foundations, framing, and load paths, plus the cracks, settlement, and prior repairs a quick walkthrough misses.
cracks · settlement · grietas
Before you buy in Puerto Rico
Before you buy here, find out what the paint is hiding.
"Looks fine" is not the same as sound, legal, permitted, insurable, and free of inherited debt. A fresh coat of paint hides a cracked column. An ocean view does not tell you the house sits in a flood zone you cannot insure. Only a licensed Puerto Rico engineer can verify the rest, before you close.
No-obligation. We reply within one business day, in writing.
The short version
Six questions to answer before you sign.
What this guide checks
- Is the structure sound for our seismic and hurricane exposure?
- Does it have a Permiso de Uso, and does the building match the permit?
- Is it in a FEMA flood zone, and can you actually insure it?
- Is there CRIM property-tax debt that becomes yours?
- Is the title clean in the Registro de la Propiedad?
- Buying under Act 60? One specific structural note applies.
Four I verify as your engineer; two (CRIM debt and title) belong to your attorney or notary, and I point you there.
That oceanfront house with the fresh paint and the killer view might be the smartest purchase you ever make. It might also be a six-figure mistake waiting for your signature. From a thousand miles away in Orlando, Tampa, the Bronx, or Houston, you cannot tell the difference, and neither can a listing photo.
I have walked hundreds of properties across this island, from coastal condos in Dorado to mountain homes in the central cordillera. I have crawled under foundations that should never have been poured, and signed off on solid homes that came through Hurricane Maria without losing a single panel of roof. After enough of those assessments, you stop trusting your eyes and start trusting the evidence. This guide walks you through the six due-diligence questions I answer before I would let a client close on any property in Puerto Rico.
Looks fine is not the same as sound, legal, permitted, insurable, free of inherited debt.
Why this market is different
Why "move-in ready" means almost nothing here.
Puerto Rico is not a typical U.S. real estate market, and a typical inspection mindset will get you hurt. The island sits in an active seismic zone and in the direct path of major hurricanes. By a 2018 Puerto Rico Builders Association study, between 585,000 and 715,000 buildings, 45 to 55 percent of the island's homes and commercial properties, were built without permits or outside the land-use codes (American Bar Association): no engineered plans, no inspections, no code. And flood risk can quietly make a property uninsurable, something you may not learn until your lender's quote lands like a brick.
The buyers driving today's headline prices are mostly cash and luxury buyers, and many of them waive inspections to win the deal. That is not confidence. That is risk they cannot see. None of this should scare you away: people build wonderful lives here every day, and plenty of older or informal homes can be brought into compliance and made sound, including the older masonry and timber houses where historic preservation and structural repair go hand in hand. The point is simple. Buy with your eyes open, with someone beside you who reads buildings for a living.
Why an engineer, not just a broker or a general inspector
A broker represents a transaction. A general home inspector, in many cases, checks for the obvious. A licensed Professional Engineer (PE) who belongs to the Colegio de Ingenieros y Agrimensores de Puerto Rico (CIAPR) (opens in a new tab) evaluates whether a structure can actually withstand the forces this island throws at it, and whether it stands on solid legal and regulatory ground. Those are different jobs, and on this island the gap between them is wide. The first four pillars below are pure engineering, where most of the hidden money lives. The last two are where I point you to the right professional and stay in my lane.
Pillar 1 · Engineering
Is it structurally sound for earthquakes and hurricanes?
The paint cannot answer this; the structure can. The 2018 Puerto Rico Building Code adopts the International Building Code (IBC 2018) and the ASCE 7-16 load standard, and because Puerto Rico is a special wind region, it sets the design wind speed property by property, read off the microzone map for that municipality. That is the load a properly designed home is built to resist while the ground underneath it can move.
Hurricane Maria was the most honest building inspector this island has ever seen. Homes built to code, with engineered reinforced concrete and properly tied roofs, overwhelmingly survived. Informally built structures, assembled without engineering and without permits, failed at a far higher rate. Same island, same storm, very different outcomes. The difference was not luck. It was engineering.
What I actually check
- Reinforced concrete condition, spalling, and corrosion of rebar, a serious and common problem in our salt-air coastal climate
- Foundation integrity and signs of settlement or movement
- The roof system, its connections to walls and foundation, and wind-uplift resistance
- Cracks that are cosmetic versus cracks that signal a structural problem
- Additions and "mejoras" built without engineering that may hide more than they fixed
Why it matters to your wallet
A home can look beautifully finished and still have a structural system that will not perform in the next major event. The finishes are not the building. The structure is the building. Structural repairs are the kind that turn a "great deal" into a money pit, and in a seismic and hurricane zone they are also a safety risk. A structural assessment tells you what the paint is hiding, before you close, while the information can still protect you.
Worried the structure cannot take the next storm or earthquake? Read the deeper guide to hurricane and earthquake safety in Puerto Rico.
Pillar 2 · Engineering
Does it have a Permiso de Uso? The question that trips up most buyers.
If you read only one section of this guide, read this one. Permit status is the single strongest line between a property that is a real asset and a liability dressed up as a bargain. A large share of Puerto Rico's housing stock was built or expanded informally: constructed or added to without permits, without engineered plans, and without the inspections that confirm the work was done correctly. The beautiful, affordable home you are looking at has a meaningful chance of being part of it, and the seller may not even know.
Under Puerto Rico's permitting framework, administered through the Oficina de Gerencia de Permisos (OGPe) (opens in a new tab), a building cannot be legally occupied without a Permiso de Uso, an occupancy permit. That document is the legal confirmation that the structure was permitted and is authorized for use. No Permiso de Uso means the building, or the part of it that was added or changed, is not legally recognized for occupancy.
What "no permit" actually costs you
- You may be unable to legally occupy or rent the property
- Financing and insurance can fall apart
- Future permits for repairs or additions get complicated
- Utilities can be harder to connect, transfer, or maintain
- Resale becomes harder when the next buyer does their homework
That second floor added without a permit, the enclosed carport that became a bedroom, the back apartment that was never legalized: any of it may have to be redesigned, legalized after the fact, or in some cases removed. What looked like extra square footage at a discount was a liability you paid for. I check whether the property has a Permiso de Uso, whether the structure standing today matches what was actually permitted, and whether additions were ever brought into the permitting system. The house in front of you and the house on the permit record are not always the same house.
See the focused guide on how to check whether a house is permitted in Puerto Rico.
Pillar 3 · Engineering
Is it in a FEMA flood zone, and can you even insure it?
Some of the most appealing properties on the island sit close to the coast, a river, or low-lying ground. That beauty can carry real water risk, one of the most common blind spots I see with diaspora buyers who fall in love with a location from a distance. FEMA (opens in a new tab) maps designate certain areas as Special Flood Hazard Areas (SFHA): zones with a meaningful annual probability of flooding. If a property sits inside one, flood insurance is typically required for a federally backed mortgage, and the premium can be substantial.
The determining factor is often elevation. Two homes on the same street can carry very different flood risk and very different annual insurance bills, because what drives the cost is the relationship between the structure's lowest floor and the base flood elevation (BFE). This is exactly the kind of question that benefits from an engineer reading the maps against the actual structure, not a glance at a listing. The flood-zone surprise usually arrives at the worst possible moment: during financing, when the lender's flood determination comes back, or after the first heavy storm season.
What flood due diligence covers
- Whether the property falls inside a FEMA Special Flood Hazard Area
- What the designation means for insurability, premium cost, and financing
- Base flood elevation (BFE) and how the structure relates to it
- What an Elevation Certificate would show, and what it means for long-term cost of ownership
Why it is engineering, not guesswork
Flood-zone reality is about elevation, drainage, and how the building sits on the land. It is far cheaper to learn this before you make an offer than to discover it after you own it. Learn how FEMA flood zones work in Puerto Rico.
Pillars 4 to 6 · Your attorney or notary's lane
Where I flag it, and your legal team clears it.
Pillar 4: Is there CRIM property-tax debt that becomes yours?
Unpaid property-tax debt owed to the Centro de Recaudación de Ingresos Municipales (CRIM) (opens in a new tab) can attach to the property and follow it to the new owner. You can buy a clean-looking house and inherit someone else's tax bill. This is real, it recurs, and it can run into serious money, but it is not an engineering question, and I will not pretend otherwise. Coordinate the Certificación de Cancelación de Deuda (a debt cancellation certification) with your attorney or notary as part of closing. Do not take the seller's word that the property is "paid up." I flag it. Your legal team clears it.
Pillar 5: Is the title clean in the Registro de la Propiedad?
A property can show no obvious problems and still have a clouded title: liens, unresolved inheritances, boundary discrepancies, or prior transfers that were never properly recorded. The Registro de la Propiedad (opens in a new tab) (the property registry) is where the legal ownership story lives, and it does not always match what the seller tells you. Coordinate the estudio de título (a title study) with your attorney or notary before you close. I tell you the structure is sound. Your attorney confirms the paper is clean. For how the physical record and the legal record relate, see the cadastre, survey, and title explainer for Puerto Rico.
Pillar 6: Buying under Act 60? A small, specific note.
Individuals relocating under Puerto Rico's Act 60 incentive framework have generally been subject to a requirement, within a defined window, to purchase a primary residence on the island. The specific rules, timelines, thresholds, and tax consequences change over time and are firmly the domain of your CPA and attorney, not your engineer. Treat anything here as general and possibly dated. Where an engineer adds value is on the property side: the residence you are required to buy is still a real building with real structural, permit, and flood questions, and a high-stakes purchase made under a compliance deadline is exactly where you do not want to skip due diligence. That is where our Act 60 engineering support fits. For an engagement that brings the engineering and regulatory verification together, see our technical due diligence service.
Code-built vs informal
Two homes, same price, opposite sides of this table.
The difference is engineering and permitting, and you cannot see it from the listing. The asking price tells you what the seller wants. Only an assessment tells you which column you are actually in.
| What you are buying | Code-built home | Informally built home |
|---|---|---|
| Permit and Permiso de Uso | Permitted, legally occupiable | Often missing; may be illegal to occupy |
| Engineering and design | Designed to the 2018 PR Building Code (IBC 2018, ASCE 7-16) | Built without an engineer or engineered plans |
| Hurricane performance | Engineered for the site-specific design wind speed; overwhelmingly survived Maria | Failed at far higher rates (roofs, walls, total loss) |
| Seismic detailing | Engineered connections and reinforcement | Unknown, often inadequate |
| Financing and insurance | Generally financeable and insurable | Frequent obstacles to both |
| Resale and legal rental | Clean to transfer and rent | Complications that transfer to you |
| Your downside | Known and predictable | Potentially five to six figures in remediation |
What the review delivers
The whole property, not the cosmetic walkthrough.
Seismic & hurricane
How the structure behaves when the ground moves and the wind tests the roof, read against the 2018 PR Building Code.
earthquake · evaluación sísmicaPermit & Permiso de Uso
OGPe records checked against what is actually built, plus whether additions were ever legalized.
permits · OGPe · permisosFlood & elevation
FEMA flood zone, base flood elevation, and what they mean for insurability and financing.
flood zone · zona inundableReinforcement & corrosion
Spalling concrete and corroded rebar behind sound-looking finishes, the defect coastal salt air drives.
rebar · spalling · corrosiónA written read you can act on
A go, conditions, or no-go judgment, with the engineering basis behind every finding. Not a repair-cost estimate.
go · conditions · no-goGo deeper on each question
- PermitIs this house permitted in Puerto Rico?
- HazardWill this house survive a hurricane or earthquake?
- FloodIs your property in a FEMA flood zone?
- TitleCadastre vs survey vs title: what each one proves.
- PrefabBuying an imported prefab home: what to demand before you pay.
- ServicePre-purchase engineering review in Puerto Rico.
FAQ
Questions before you buy.
Still deciding? Ask us directly, no obligation, and you hear back within one business day.
Do I really need an engineer if the house looks renovated and move-in ready?
Yes, and arguably more so. Cosmetic renovation is exactly what hides structural and permitting problems. Fresh paint, new tile, and a modern kitchen tell you nothing about the rebar, the roof-to-wall connections, the foundation, or whether that beautiful addition was ever permitted. "Looks fine" is a feeling. An engineering review gives you facts.
Can a real estate broker confirm whether a property is sound and properly permitted?
No. A broker facilitates the transaction and can tell you what they have been told. Verifying that a structure is sound, legally permitted, insurable, and built to code is engineering and regulatory work that requires a licensed Professional Engineer. Those are different jobs.
I am buying in cash from Florida, New York, or Texas. Should I still assess it?
Especially then. Cash buyers waiving an assessment is exactly how expensive surprises get bought, and you are wiring six figures sight unseen. We regularly support diaspora buyers remotely: we assess the property, verify permit status, and read flood exposure on the ground, then report back so you can decide without flying in for every showing.
What does a pre-purchase engineering review actually cost?
A pre-purchase engineering review is a small fraction of the purchase price, and we scope it with you on the first call. Set that against a six-figure purchase that can hide structural, permit, or flood problems, and it is some of the cheapest insurance you will ever buy.
What if the home does not have a Permiso de Uso (occupancy permit)?
It does not automatically mean walk away, but it does mean you need to understand exactly what you are taking on: whether the structure can be legalized, what that would involve, and how it affects financing, insurance, and resale. That information should shape your offer and your decision, not surprise you after closing.
How do I know if a property was built informally?
You verify it. A permit check at OGPe (Oficina de Gerencia de Permisos) shows what is on record, and a structural assessment on site shows what is physically there. When those two do not match (an addition, an extra floor, a converted space, or an entire unpermitted structure), that gap is the risk. By a 2018 Puerto Rico Builders Association estimate, 45 to 55 percent of the island's homes and commercial buildings were built without permits or outside the land-use codes, so this is not a rare edge case.
Can you also handle the CRIM tax-debt and title checks?
No, and you should be cautious of anyone who claims to do everything. CRIM (Centro de Recaudación de Ingresos Municipales) tax-debt clearance and the title study (estudio de título) are legal matters for your attorney or notary. An engineer verifies the physical structure, the permits, and the flood exposure. The right purchase uses both teams.
Does buying under Act 60 change the engineering due diligence?
No. The engineering, permitting, flood, and structural realities apply to every property regardless of tax status. The tax and legal qualification specifics for Act 60 are a separate matter for your attorney and tax advisor.
Talk to an engineer before you sign.
Brokers sell the view. We verify the building. The conversation is free, the perspective is professional, and the confidence is worth it.
Who stands behind this guide
One licensed read, signed.
The accountable engineer
Every finding in your report is one I will put my seal to. That is the difference between an opinion and accountable engineering.
Edgardo L. Santiago Martínez, PE Chief Engineering Officer · PE Lic. #12474, CIAPR This guide is general engineering education, not legal, tax, or real estate brokerage advice. It does not create an engineer-client relationship and should not be relied upon as a professional opinion about any specific property. Code references and program rules change over time. Puerto Rico Engineering, LLC is an engineering firm, not a real estate broker, attorney, notary, or tax advisor. For property-tax (CRIM), title (Registro de la Propiedad), and Act 60 matters, engage a licensed attorney, notary, or tax professional. The engineering report is a go, conditions, or no-go judgment, not a repair-cost estimate. Before any purchase decision, retain a licensed Professional Engineer to evaluate the specific property.