onesta real estate

The dynamic real estate market needs a stable efficient and transparent service with a professional personal-oriented touch. Onesta Real Estate meets that need.

Onesta Real Estate is internationally oriented and specialized in expat housing and related services. We can communicate with you in English, Spanish, German and of course Dutch.

We are able to offer:

  • Expat services;
  • Rental and leasing;
  • Buying and selling;
  • Management;
  • (Validated) Appraisals.

We have been working for years in the area of mortgages, insurance, taxes, small or complete renovations working together with specialists, selected on the basis of quality and experience.

The customer is always king. "Taking care" is our motto. We are able to provide all our services under one roof. Our efficient method ensures that no unnecessary work is carried out. Onesta Real Estate save you time and money.

By working closely together and joining forces with partners, we are able to offer our high-quality services at competitive prices.

Bekijk hier het filmpje over ons wat pas is uitgezonden bij RTL Woontips.

Meet the team of Onesta Real estate

team onesta vastgoed Melanie

Melanie Barsoumian

Gecertificeerd Makelaar / Taxateur


  • Opstellen van gevalideerde taxatierapporten
  • Verkoop woningen
  • Vastgoed beheer
  • Expat aan- verhuur services
  • Inzicht in de Haagse woningmarkt

"Inmiddels ben ik al 6 jaar werkzaam in de Haagse vastgoed wereld en heb in die jaren een breed netwerk opgebouwd. Aan het begin van mijn vastgoedcarrière heb ik mij voornamelijk beziggehouden met aan- en verhuurdiensten voor expats. Op dit moment maak ik regelmatig gevalideerde taxaties op voor cliënten met als doel het verkrijgen van een financiering. Het waarderen van woningen vindt ik erg interessant om te doen, het geeft een zeer goed beeld van de marktontwikkelingen in de branche. Ook het succesvol verkopen van woningen in deze tijd is een echte uitdaging, ik probeer mij te onderscheiden door per pand een gunstige verkoopstrategie te bedenken tegen gunstige voorwaarden".

team onesta vastgoed Vincent

Vincent de Wit

Gecertificeerd Makelaar / Taxateur

team onesta vastgoed Jober

Melanie Barsoumian

Certified Broker / Valuer.

All-round broker, founder and owner of Onesta Vastgoed (Real  Estate). I am passionate and driven. I have a flexible attitude and love challenges. These properties are also found in my staff, which I select and work with.

In order to give appropriate advice  it is important to follow the property market in The Hague closely. Local knowledge is paramount. Through continuous education and a broad network, I keep abreast of developments in the real estate market and its related regulations.

My goal is serving customers in a friendly and professional manner, quick and efficient manner. Partly by maintaining contact with clients, aiming to answer any question within 24 hours or by solving any forthcoming problem. With this professional setting, I also lead  my team.

My expertise:

  • Drafting (validated) valuation reports
  • Valuations in the rental and sale industry
  • Counseling / mediation in buying and selling
  • Understanding housing in The Hague. 
  • Expat guidance
  • Managing real estate.

team onesta vastgoed Sarah

Sarah van der Heijden

Broker / Valuer (finishing degree) in Real Estate; Rental property.

I work at Onesta Vastgoed as Broker / Valuer in the Real Estate rental property market. I am currently studying and finishing my degree.

The listing and presentation of properties on the Internet is very important. My specialty is presenting attractive photos with informative descriptions. The goal is successful hiring with the most favorable prices and terms.

I grew up in Spain and have also lived for a while in England. Recently I returned to the Netherlands as an Expat. As a linguist I am able to speak in Spanish, English, German and of course Dutch. As I have lived and worked abroad, I can identify with the needs and wishes of foreign clients. My challenge is to make our clients feel at home as soon as possible. The process in finding appropriate housing can sometimes be erratic, therefore I aim to run as carefree as possible for all our clients. I do not have a 9 to 5 mentality. We understand expats are particularly looking for reliable and a total comprehensive service. I can realize these services, which I pleasingly offer on behalf of Onesta Vastgoed.


  • Expat guidance (available in Spanish, English, Dutch or German)
  • Assistance with tenancies
  • Rent valuations
  •  Assistance with purchase
  • Managing real estate

team onesta vastgoed Hilde

Naomi van der Mark secretaresse

Secretary / office employee; attained a Schoevers Associate Degree Office Management.

In 2008 I completed the course Associate Degree in Office Management at Schoevers. As secretary to the assistant management / office manager PA, I gained a valuable and professional experience. Since October 2014 I am employed as secretary / office employee working at Onesta Vastgoed. I am often seen as the face of Onesta; which is not surprising since almost all (first) contacts go through me.

The calls and e-mails are coordinated by me. I provide information and answer all questions with great pleasure. Taking into account the needs and capabilities of the associates, I do strategic planning of all appointments.

Contracts, agreements and invoicing are produced with the up most care. I ensure all deadlines are met and that the entire process office routines run smoothly, even when pressure reaches its

team onesta vastgoed Jober

Anouk de Loos

Office manager / binnendienstmedewerker

team onesta vastgoed Colin

Colin Tetteroo

More info soon

team onesta vastgoed Manuel

Manuel Barsoumian

More info soon

team onesta vastgoed Jober

Rogelio Siem

Makelaar / taxateur in opleiding - stagiair

team onesta vastgoed Mike

Mike Pex

Broker/appraiser trainee

I am studying to be a broker / appraiser and I am doing an internship at Onesta Vastgoed, to put my education into practice and to gain experience. I walk with the brokers and assist where possible. As I am also part-time working in the hospitality industry, I’m quite busy. I meet a lot of people and in both aspects it's all about good service. Soon I will have finished my diploma,(which is a good basis for a career in the real estate industry). I am very motivated and eager to learn. Although it is busy, I find it very fascinating. My main focus is on my studies and internship. I want to complete my training as soon as possible because I can’t wait to start work as a broker!