Buy on numbers, not on square meters.
You found a property on the Costa Blanca. Before you commit €200,000, €400,000 or €1,000,000 — we’ll send you a full investment analysis. Financial model, IRR, taxes, exit scenarios. 48 hours. €597.
A decision-grade report. Not a property brochure.
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Full acquisition cost: price + ITP/VAT + notary + registry + legal + plusvalía — to the euro.
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Net rental yield: ADR by season, occupancy projection, operating costs, management fee.
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IRR and payback period across 5-year and 10-year horizons.
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Tax position: Modelo 210, wealth tax, treaty credits — built by a former SUMA insider.
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Risk flags: licensing exposure, community charges, structural notes from the listing.
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Exit scenarios: resale, long-let conversion, hold — with numbers on each.
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A clear recommendation: buy, renegotiate, or walk.
How we build the report.
Micro-location market scan
Comparable sales and rentals within 500m. Real prices, real occupancy — not portal averages.
Asset-level due diligence
Listing read line by line. Community charges, licensing status, structural notes. Anything off — flagged.
Financial modelling
Cashflow built bottom-up. Acquisition costs, gross income, operating expenses, taxes, IRR, payback.
Tax overlay
Modelo 210, wealth tax, treaty credits applied to your specific home country. The number that actually hits your account.
Recommendation
Buy, renegotiate, or walk — with the price and conditions that would change the answer.
Honest no, when needed
We are paid for advisory, not closings. When the analysis says no, we say no, even when it costs us a deal.
Most agents earn commission on the close. We don’t.
The Costa Blanca property market runs on commission. Agents are paid when paper changes hands. Their incentive is the transaction. Ours is the return on your capital.
Costa Larga is paid for analysis, not for closings. We reject more than 70% of the properties we’re asked to review. The ones that pass come with a full financial model. The ones that fail come with a written reason.
“We sell analysis. Not square meters.”
Quick answers.
What if the property fails the analysis?
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You get the full PDF showing exactly why, with the specific numbers that don't work. You save yourself a bad purchase. Then we recommend two or three pre-vetted alternatives at no additional cost.
Do you visit the property?
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For analyses on Costa Blanca within 60km of Torrevieja, yes — we run a physical inspection inside the 48-hour window. Outside that radius, we work from listing photos, video walkthrough and public records.
Can you negotiate the purchase for me?
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Yes — but as a separate engagement. The analysis is the standalone product. If you want us to run the negotiation, NIE, bank, due diligence and notary handover, that's the Sarah Katerina Property Purchase line. Quoted separately.
Why €597?
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It's the price at which we can deliver a real analysis profitably and you can buy it without thinking twice. On a €280k purchase it's 0.21% of the deal. Most clients consider it the cheapest line item in the entire transaction.
How fast, really?
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48 hours from intake. Intake is a 10-minute form sent within 1 hour of payment. We hold ourselves to this — if we're going to miss it (we don't), we tell you within the first hour.
Founded by a former Senior Director at SUMA.
Costa Larga is a service of Sarah Katerina Group. The analysis framework was built by someone who spent twenty years auditing non-resident files inside Spain’s regional tax administration. The tax overlay isn’t a footnote in our reports — it’s the part most other firms get wrong.
Read about Sarah →Numbers first. Emotion second.
A sample of the kind of decisions our analysis has informed — including the deals we recommended walking away from.
“I was ready to sign on what looked like a great buy-to-let. The 48-hour analysis showed the net yield was 2.3 %, not the 7 % the agent had promised. I walked away. Saved a €280,000 mistake.”
“We started with the 30-minute call expecting a sales pitch. Got an honest 'don't buy this one' from Sarah's first look. Three months later we bought a different property through her full advisory. The trust was built in that first call.”
Tell us about the property. Then pay €597.
Submit this form and you’ll be taken to secure card payment for €597. Within 1 hour we confirm and assign an analyst. PDF report delivered within 48 hours. We deliver 15 analyses per week, no more.
Your data is encrypted in transit and stored only for as long as we need it to deliver your diagnostic. We never share it with third parties. GDPR-compliant. See privacy policy →
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