Costa Larga Investment is a boutique real estate advisory based in Torrevieja. We analyse property investments for foreign buyers, partner directly with major Costa Blanca landowners to structure turnkey development projects, and handle the full legal, fiscal, and administrative side of the transaction. Our work begins with the numbers — and stays there until the keys are in your hand.
Costa Larga Investment is a boutique real estate advisory based in Torrevieja. We analyse property investments for foreign buyers, partner directly with major Costa Blanca landowners to structure turnkey development projects, and handle the full legal, fiscal, and administrative side of the transaction. Our work begins with the numbers — and stays there until the keys are in your hand.
Buying property in Spain as a foreign investor is an exciting opportunity. It can also be the most costly financial mistake of your life. Taxes, hidden debts, urban planning restrictions, community liabilities, tourist licensing, and fiscal reporting obligations — none of them appear in the listing, and very few of them are mentioned at the viewing.
Our founder Sarah Katerina Kastlunger Pérez spent 20 years as a Senior Director at SUMA Gestión Tributaria, the official tax authority for the Alicante province. From inside the system, he saw patterns the market never advertised: unpaid property taxes tied to title, undeclared extensions that collapsed into fines, tourist licences that could not legally be transferred to a new owner, community debts waiting on the next buyer. The same problems, repeating across thousands of transactions, year after year.
No one was protecting the buyer. Advisors came from sales. Incentives pointed in the wrong direction. The investor — usually from abroad, often buying in a second language — was the last person in the room to see the full picture.
Costa Larga Investment was built to solve that problem.
Our founder Sarah Katerina Kastlunger Pérez spent 20 years as a Senior Director at SUMA Gestión Tributaria, the official tax authority for the Alicante province. From inside the system, he saw patterns the market never advertised: unpaid property taxes tied to title, undeclared extensions that collapsed into fines, tourist licences that could not legally be transferred to a new owner, community debts waiting on the next buyer. The same problems, repeating across thousands of transactions, year after year.
No one was protecting the buyer. Advisors came from sales. Incentives pointed in the wrong direction. The investor — usually from abroad, often buying in a second language — was the last person in the room to see the full picture.
Costa Larga Investment was built to solve that problem.
Every engagement runs on the same logic: a short brief, a written investment case, a full legal and fiscal check, and a transaction handled end-to-end — from the NIE to the entry in the Registro de la Propiedad. You sign once. We run the process.
We work exclusively in Torrevieja and the surrounding Costa Blanca — not because the market is the biggest in Spain, but because it is the one we know from the inside. Every town, every community, every notary.
Local depth is what lets us underwrite honestly: the difference between a strong investment and a disappointing one rarely shows up in the photos. It shows up in the paperwork.
Owning a home is a keystone of wealth… both financial affluence and emotional security.