Your legal partner in Spain. One firm for buying, selling, inheriting and owning property.
Spain is complex. We've been handling all of it since 2001.
From your first property search to your last tax return in Spain, Mar and Vicente handle everything personally. Three languages. One team. No handoffs.
You're not hiring a law firm.
You're gaining two partners who know your file personally.
Most people who come to us have been told Spain is complicated. They're right — it is. What they need isn't a list of services. They need someone who explains what's happening, flags problems before they become expensive, and stays involved from the first email to the last tax return.
That's what Mar and Vicente have been doing since 2001. We don't just check the documents. We check the property itself on site, before you sign anything. We don't just file the tax return. We model the tax impact before you commit. And we don't disappear once the deal is closed — your annual taxes, your next purchase, your will: we're still here for all of it.
What we do best.
The three areas that bring most of our international clients to us. Each one handled directly by Mar or Vicente: not delegated, not outsourced.
Buying and Selling Properties in Spain
Whether you're buying or selling, we protect the transaction from both ends.
When you buy, we inspect the property on site before any contract is signed — reviewing the legal and urban reality of the asset, not just the paperwork the seller provides. We handle NIE, legal due diligence, contract negotiation, notary representation and tax filings.
When you sell, the process requires a different level of care. We carry out a full legal review before the transaction moves forward: including any New Build Declarations (Declaración de Obra Nueva) that must be regularised before the deed can be signed. We scrutinise every fiscal withholding the buyer's side applies to confirm it is legally justified and not inflated. And once the deed is signed, we analyse the full settlement to recover any amount you are owed. In most cases, there is money to recover and we make sure you get it back.
Spanish Inheritance
Dealing with an inheritance in Spain from abroad is one of the most stressful things a family can face. The deadlines are strict, the taxes are significant, and the paperwork is entirely in Spanish. Mar handles every step personally — from the initial asset inventory to the final tax settlement — so your family doesn't have to navigate the Spanish system alone during an already difficult time. We work in English and German throughout.
Inheritance lawyer in Spain for foreigners →Spanish Wills
A Spanish will is one of the most important things you can do for your family before you need it. Without one, your heirs face months of extra paperwork, higher costs and avoidable delays, all while dealing with a loss. We draft it, sign it before a Spanish notary and register it correctly. If you already have a will in your home country, that's a good start: but it almost certainly doesn't cover your Spanish assets the way it should. We'll tell you honestly whether you need one here.
Two partners. Twenty-five years. Thousands of clients.
Sol-4 isn't a corporate firm. When you hire Sol-4, you work with Mar or Vicente directly: they know your file, they return your calls, and they're the ones sitting across the table at the notary. No associates, no junior staff handling your case.
Mar Bascuñana
Lawyer specialised in property law, tax law and inheritance. Mar leads every transaction from due diligence to post-completion — personally. Registered member of the Bar Association of Orihuela (ICAO) · Member of APAZ · Secretary of AEDIC (Spanish Association of Insolvency Law) · Regional Delegate for Alicante, Tax Advisors of the Valencian Community · Member of APIA.
A. Vicente Sáez
Specialist in property transactions and notary representation. Vicente is the primary point of contact for our German and English-speaking clients — handling German natively for clients from Germany, Austria and Switzerland, and conducting the full transaction in English for British, Dutch and other international clients.
A clear process. Always.
You tell us your case
We reply within 24 hours, Monday to Friday.
We meet
In person or online. We tell you honestly whether we can help and what it'll involve.
We handle it
We take it from there: documents, due diligence, notary, tax filings, registrations. No hidden fees, no unexpected costs. You receive a clear summary at each stage so you always know where things stand. We translate the legal reality into plain language, because you shouldn't need a law degree to understand what's happening with your own property.
We stay with you
The transaction closes. We don't. Once you own property in Spain, there are taxes, possible rental declarations, future sales, inheritances and wills to plan. Most of our clients have been with us for years — not because they have to be, but because they know that when something changes in their life in Spain, they have someone to call. That's the part we're most proud of.
What our clients say.
Real reviews from Google. We're proud of every one.
Beyond property law.
One team. Every aspect of life and business in Spain. No juggling multiple agencies.
Business & tax advisory — for companies and self-employed in Spain.
Running a business or working as self-employed in Spain means a constant stream of tax deadlines, quarterly filings and labour obligations. We handle all of it for around 100 active companies and self-employed professionals across the Costa Blanca — so they can focus on the work, not the paperwork.
What we cover: quarterly tax filings, payroll, employment contracts, company formation and full ongoing advisory.
And because paperwork shouldn't mean endless email chains, all documentation is managed through Biloop, our client portal where you upload, track and sign everything in one place. Your numbers, organised. Your time, protected.
NIE, TIE y Residencia
Differentiating between TIE for non-EU citizens (e.g. UK, US, Russian) and the EU Residency Certificate for European citizens (e.g. German, Dutch). We handle fast-tracked processing with full representation.
Get yours →Resident & Non-Resident Tax (Form 100 & 210)
Comprehensive tax representation. Annual income tax declarations (Modelo 100) for Spanish residents, and quarterly or annual non-resident tax declarations (Modelo 210) for property owners.
Learn more →Mortgages
Spanish mortgage advice and representation at signing. We coordinate with lenders and the notary so you don't have to.
Find out more →Tourist Licenses
Application, registration and compliance for holiday rental properties on the Costa Blanca.
Get licensed →Complementary Services
Everything else you need when you own property or live in Spain.
Tell us your case.
We'll read it, we'll come back to you within 24 hours, and we'll tell you honestly whether we're the right people to help. No pressure, no commitment.
Benimar I, Benijófar, Spain