Jaime Díaz de Bustamante Berasategui



Master of Business Law (Instituto de Empresa) IE Business School (1998-1999).
Degree in Law – Universidad Complutense (1997).

Professional career

EY (Ernst & Young) – Associate (1999-2004)
BOJ Inmobiliaria Group – Legal Director (2005-2007)
Clifford Chance – Senior Associate (2007-2011)
Ramón y Cajal – Partner (2011-2015)
ONTIER – Partner (2015-2020)


Jaime Díaz de Bustamante has more than twenty years’ experience as an expert lawyer in real estate law and is recognised in this speciality in the most prestigious international directories (Chambers, Legal 500, etc.). Jaime has advised on all types of transactions related to the real estate sector, including the acquisition and divestment of real estate assets and companies (shopping centres, offices, tertiary and commercial, logistics and industrial, residential, land in development and plots), the assignment of loan/credit portfolios with underlying real estate collateral and real estate agreements (construction, leases, surface rights, Sale & Leaseback, etc.).

Its specialization includes financing for the acquisition or construction of real estate assets as hotels, logistics, offices and shopping centres.

Membership of professional bodies and associations

Madrid Bar Association
ULI (Urban Land Institute)
The Law Reviews – Expert Panel 2017
Real Estate Law Experts – Europe
Chambers & Partners 2020 & Real Estate Global Guide 2020




Real Estate Guide 2020 – Chambers & Partners
Article (Expansion 2/06/2020) on “Real Estate Assets The financial solution for companies after COVID-19”.
Article (El Independiente 30/04/2020) on “Covid-19: A new real estate scenario
Article (Expansión 5/03/2020) on “A New Residential City Concept: Coliving”.
Press release and conference (15/02/2018) by AGUIRRE NEWMAN and ONTIER in relation to Land Regulations in Andalusia and Madrid
Article (Expansion 24/11/2017) “Leisure and Tourism, Retail digitalization”.
Legal article (Expansión 30/6/2016) in relation to the rulings of the Supreme Court, which have declared several PGOU in Spain null and void
Speaker at the VIII Conference of Residential Tourism for Andalusia Real Estate (2/6/2016)
Press release and discussion (25/5/2016) between AGUIRRE NEWMAN and ONTIER in relation to the 1st Property Event and its prospects
Legal article (Andalucía Inmobiliaria 5/5/2016) regarding the acquisition and financing of real estate assets
Legal article (Five Days 31/3/2015) in relation to Sale & Leaseback operations
Speaker at several property talks to official bodies such as the BANCO DE ESPAÑA and the CNMV (2012 and 2014)
Lecturer in property law in the Master’s Degree in Urban Planning at the CEU (2012 to 2014)


Real Estate Hospitality Retail


  • 2021

Best Lawyers 2021. Real Estate Law