Buying a Nosara Home With Unpermitted Construction: Risks, Legalization Costs and How to Negotiate

If you are buying a Nosara home with unpermitted construction, you are in good company, and that is the problem. A large share of the houses, casitas, pools and second-floor additions around Playa Guiones, Pelada and Garza were built, extended or "finished later" without a municipal permit. Most buyers only learn this after they have fallen for the property. This guide explains how common the issue is, how to spot it, what it can cost you, how legalization works through the Municipality of Nicoya and the CFIA, and how to turn a permit gap into a better price instead of an inherited liability.

📊 The local number: in the CFIA's 2024 inspection data, 40% of the construction sites inspected in the canton of Nicoya, which includes Nosara, had no municipal permit. Guanacaste as a province rose from 26% in 2023 to 33% in 2024. (Source: CFIA inspection report, reported by El Observador, March 2025.)

That 40% figure covers active building sites, not finished homes, so it does not mean four in ten Nosara houses are illegal. It does tell you that skipping the permit is a normal local habit, and every resale home you look at deserves a permit check.

Why Unpermitted Construction Is So Common in Nosara

Nosara grew fast, from the outside in. Many early homes were built by owners who bought land in the 1990s and 2000s, hired a local crew and added rooms as money and time allowed. Several patterns show up again and again:

• The original house was permitted, the additions were not. A two-bedroom home gets a permit, then a casita, a rooftop deck, a closed-in garage or a second-floor bedroom appear later.
• The pool and the deck were treated as "small stuff." CFIA data shows complementary works (walls, pools, decks, ranchos) had a 51% non-compliance rate nationally in 2024, double the rate for homes.
• The plans and the house drifted apart. A permit exists, but the house was built larger, with a different layout or with more bathrooms than the approved plans show.
• Work was done as an "obra menor." Costa Rica allows minor repairs and remodels without a licensed professional, but only under a value cap and only if they do not touch structure, electrical or mechanical systems. Plenty of work that was called minor was not.

💡 Key insight: In Nosara the question is rarely "does this house have a permit?" It is "does every structure on this lot match a permit?" Assume the answer is no until documents prove otherwise.

Why It Matters to You as the Buyer

In Costa Rica, construction is not separately titled. The National Registry records the land, and its description (the naturaleza field) may say "terreno para construir" even when a four-bedroom villa sits on it. That means your title report will not warn you about unpermitted buildings. The risk transfers to you quietly at closing.

Here is what that risk looks like in practice:

Risk	What can happen	How likely in practice
Municipal enforcement	Notice to legalize, fines, a stop-work order, and in serious cases a declaration of inhabitability or demolition order under the Construction Law (Ley 833, arts. 94 and 96)	Low for old, stable structures; higher for setback, river or slope violations and neighbor complaints
Blocked future permits	The municipality may refuse a new permit for your renovation or pool until existing work is legalized	High. This is the most common way buyers get caught
Resale friction	Your buyer's lawyer finds the same gap and asks for a discount or a fix	High, and rising as buyers get more careful
Bank financing	Lenders and appraisers usually value only documented, permitted construction	High if you or your future buyer plans to borrow
Insurance	An insurer may question coverage on structures with no permit or plans	Moderate. Ask your broker before you buy (see our property insurance guide)
Safety	No engineer reviewed the structure, wiring or septic	Varies. This one matters most in an earthquake zone
Tax catch-up	Legalizing adds the construction to your declared value, which raises annual property tax	Certain once you legalize. See our property value declaration guide

💡 Key insight: The realistic risk is usually not a bulldozer. It is that you cannot get a permit for the work you want to do, and that the next buyer's lawyer finds what yours missed.

Not All Permit Problems Are Equal

Separate fixable paperwork gaps from problems that legalization cannot solve. A rough triage:

Category	Example	Can it be legalized?
Paperwork gap	Well-built casita that meets setbacks and coverage, never permitted	Usually yes, with as-built plans, fees and possibly a fine
Plan mismatch	House built 20% larger than the approved plans	Usually yes, by filing updated plans for the difference
Code problem	Addition with no engineered foundation, or wiring that fails inspection	Yes, but only after physical correction work
Zoning or setback violation	Structure too close to a property line, a road, or over the allowed lot coverage	Sometimes, sometimes not. May require partial removal
Protected-area violation	Building inside a river protection zone, on very steep slope or in forest	Often no. Removal may be the only fix
Maritime zone violation	Structure on concession land beyond what the concession allows	Serious. Can threaten the concession itself

If the problem falls in the last three rows, slow down and read our guides on river protection zones and setbacks, hillside lots and titled versus concession property before you go further.

💡 Key insight: A missing permit on a well-built structure is a pricing issue. A structure in a place where nothing could ever be permitted is a deal issue.

How to Spot Unpermitted Construction Before You Make an Offer

You can find most of this with a few documents and a careful walk-through.

Ask the seller for the paper trail

Request, in writing:

• The municipal construction permits (permisos de construcción) for the house and every later addition
• The CFIA-stamped construction plans (planos constructivos) for each permit
• The registered survey plan, or plano catastrado
• The land use certificate (uso de suelo) issued when the permit was granted
• The water availability letter and any septic approval (see our septic guide)
• The most recent property value declaration filed with the municipality

A seller who answers "it's all fine, everyone builds like that" has given you an answer.

Compare the plans to the property

Walk the house with the approved plans in hand. Count bedrooms and bathrooms. Measure the footprint roughly. Look for:

• A casita, studio or bodega that does not appear on any plan
• A pool, rancho or deck that appears nowhere in the paperwork
• A second floor or roof terrace missing from the elevations
• A garage or covered terrace that has been closed in and turned into living space
• Mixed construction styles, which often mark the line between the original permitted house and later work

Check the municipal and CFIA records

Your lawyer can request the permit file from the Municipality of Nicoya, which issues construction permits for the Nosara district, and can check the CFIA's records for projects registered on the property. If the municipal file shows a 150 m² house and you are looking at 280 m² of finished space, you have found your gap.

Bring the right professionals

A general home inspection finds defects. For permit questions, add a CFIA-registered architect or engineer who can tell you whether each structure is legalizable, what correction work it needs, and roughly what the process will cost. Our guide to hiring an architect in Nosara covers how to find one.

💡 Key insight: Your lawyer checks the paper. Your engineer checks the building. You need both opinions before you know what the gap is worth.

How Legalization Works in Nosara

There is no special amnesty program. Legalizing existing construction follows the ordinary permit process, filed after the fact. The steps generally look like this:

1. Professional assessment. A CFIA-registered architect or engineer inspects the structure, measures it and decides whether it meets current code, setbacks and coverage limits.
2. Correction work, if needed. Structural reinforcement, electrical upgrades, septic changes or partial removal of anything that cannot be approved.
3. As-built plans. The professional draws plans of the structure as it actually exists and takes legal responsibility for them.
4. CFIA registration. The plans and the professional's responsibility contract are filed through the CFIA's digital platform (APC), with the CFIA fees that apply.
5. Supporting documents. Updated land use certificate, water availability, catastro plan and any other approvals the municipality requires for that lot.
6. Municipal filing. The file goes to the Municipality of Nicoya, which reviews it and charges the construction tax (municipalities can charge up to 1% of the construction value under Article 70 of the Urban Planning Law) plus any fine it applies.
7. Updated tax declaration. The legalized construction is added to the property's declared value.

What it typically costs and how long it takes

Costs depend heavily on the size of the structure and how much correction work it needs. Use these as planning ranges to discuss with your professional, not as quotes.

Item	Typical range	Notes
Architect or engineer assessment	$500 to $2,000	More for multiple structures
As-built plans and CFIA filing	Often $2,000 to $8,000+	Professional fees scale with square meters
Municipal construction tax	Up to 1% of construction value	On $300,000 of construction, up to $3,000
Fines	Varies by municipality and case	Ask the municipality during due diligence
Correction work	$0 to tens of thousands	The real wildcard. Get a written estimate
Timeline	Roughly 2 to 6 months	Longer if corrections or extra approvals are needed

For context, the "minor works" exception only covers jobs worth up to ten base salaries. With the 2026 base salary held at ₡462,200, that cap is about ₡4.6 million, or roughly $9,000. Anything bigger, or anything that touches structure, wiring or plumbing systems, was never a minor work, regardless of what the seller was told.

💡 Key insight: For a sound structure that meets setbacks, legalization is usually a few thousand dollars and a few months of patience. The expensive surprises come from correction work, so price that first.

How to Negotiate When You Find a Permit Gap

Once you know what the gap is and what fixing it costs, you have four main options. Our negotiation guide covers the broader tactics.

Option	How it works	Best when
Seller legalizes before closing	Completion of legalization becomes a condition of the purchase	You have time, and the seller is motivated and organized
Price reduction	You deduct the estimated cost of legalization, correction work and a risk margin	The fix is well defined and you want control of the process
Escrow holdback	Part of the price stays in escrow until legalization is complete	You want to close now but keep leverage
Walk away	You decline the property	The structure sits in a protected zone, or the seller will not disclose

Build the chosen approach into your contract. If you are using an option to purchase agreement, make legalization or the holdback an explicit condition, with a deadline and a clear consequence if it is missed. Ask for a seller representation that lists every structure on the property and states its permit status in writing.

💡 Key insight: A permit gap you discover before signing is a negotiating asset. The same gap discovered after closing is your expense.

What This Looks Like in Real Numbers

Here is a simplified example, using round numbers for illustration only.

A three-bedroom home in Playa Pelada is listed at $850,000. The original 160 m² house is permitted. A 45 m² casita and the pool were added later with no permit. The casita is the property's best rental unit.

Step	Estimate
Engineer assessment and as-built plans for casita and pool	$5,000
CFIA fees and municipal construction tax	$2,500
Electrical correction in the casita	$4,000
Possible fine and contingency	$3,500
Total estimated cost to legalize	$15,000

A sensible buyer might ask for a $25,000 to $30,000 reduction, covering the $15,000 cost plus compensation for several months of delay, the risk of surprises, and the higher property tax that follows. Alternatively, the buyer might close at a smaller reduction with $20,000 held in escrow until the municipality approves the file. If the casita were inside a river setback instead, the conversation would be about whether the casita can stay at all, and that changes the value of the home far more than $15,000.

If you plan to rent the casita, read our guide on adding a casita or guest house, since a legal, permitted unit is also easier to insure, market and eventually sell.

A Buyer's Checklist

Before you remove contingencies on any Nosara resale home:

• Every structure on the lot is listed in writing by the seller
• Each structure is matched to a municipal permit and CFIA plans
• Your lawyer has checked the municipal permit file in Nicoya
• A CFIA-registered professional has assessed anything without a permit
• No structure sits in a river protection zone, maritime zone or setback
• Legalization cost and timeline are estimated in writing
• The contract specifies who legalizes, by when, and what happens if it fails
• Your insurer has confirmed how it treats any structures still being legalized

Add these items to your general due diligence checklist and talk them through with a real estate lawyer who has handled Nosara files before.

The Bottom Line

Unpermitted construction does not have to kill a deal in Nosara. With 40% of construction sites in the canton recently found without permits, refusing to look at any home with a gap would rule out a large part of the market. What matters is knowing exactly which structures are missing paperwork, whether they can be legalized, and who pays. Get the documents, bring an engineer, put the answer in the contract and price the risk.

If you are still deciding where to buy, compare Playa Guiones, Playa Pelada and Garza, then work through our buyer's guide so the permit check sits alongside every other step of the purchase.