Onesta Real Estate

team onesta vastgoed makelaar den haag

The real estate market can be very dynamic. One year, properties won’t sell and rentals remain vacant. The next year the interest drops to historic lows and the housing market overheats. That calls for a calm and stable partner. At Onesta, we always keep our heads cool and our eyes on the ball!

Because of our efficiency and transparency, you can rely on our professional services without being confronted with extra work or extra fees.

We are a one stop shop for:

  • Buying and selling assistance
  • Rental assistance, both for tenants and landlords
  • Expat services
  • Mortgages and insurances
  • Property and asset management
  • (Certified) valuations

Both Onesta has many years of experience working with expats and internationals. We are specialized in expat housing and expat mortgages. We speak English, Spanish, German and Dutch of course.

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You can find our office around the corner at the Lange Voorhout in the cozy Buurtschap 2005:

Denneweg 9D
2514 CB The Hague

Our second office is located at the Scheveningen harbor (crossing Statenlaan/Westduinweg):

Van Bergenstraat 49
2583 CS The Hague

Meet the team of Onesta Real Estate

team onesta vastgoed Melanie

Melanie Barsoumian

Owner and Certified Realtor / Valuer

Our headpiece, Melanie, set up Onesta over 13 years ago. A wealth of knowledge, experience and the ability to gather the best team around her (😉) ensure that Onesta is rock solid!

team onesta vastgoed hediyeh

Hediyeh Notash

Realtor in training

With Hediyeh, the sky is the limit. With a view to opening a third location in Purmerend, we are in good with this realtor in training. She comes from the marketing world and uses that knowledge at Onesta for everything related to mailings and social media!

team onesta vastgoed Sarah

Sarah van der Heijden

Rental Realtor

A Spanish touch is what Sarah brings us! And let that come in handy when working with expats, because they can speak to them in several languages. With her extensive experience in the rental business, this is a golden combination.

team onesta vastgoed Lisette

Lisette de Ronde

Realtor in training

Rental contracts, key transfersl, check-in and outs: when you rent out your home, it can quickly be that the overview is lost.. Together with Sarah, Lisette is the star of the rental business and relieves you during the entire process. She is ready to explain and figure everything out in detail. Are you still struggling as a tenant or landlord? Lisette is there for you.

team onesta vastgoed Boris

Boris van der Heijden

Realtor / Valuer (trainee)

Sharp negotiations? A current view of the market? Leave that up to Boris. He is known to us as Big Boris for a reason. Getting the highest yield is without a doubt his life goal.

team onesta vastgoed Colin

Colin Tetteroo

Backoffice assistant

All-rounder Colin flies in the office from management to valuations, and from IT to social media. There's really nothing he can't do! And with a good dose of hospitality: this centipede is always ready to help you.

team onesta vastgoed Frans

Thierry van Splunteren

Certified Realtor / Valuer 

Looking for attention and someone who knows what is going on in the country of purchase? Then you are at the right adress with Thierry! He is known for always taing the time for all your questions and worries. It will be a pleasure working with him during your search for a new home!

team onesta vastgoed Lenneke

Lenneke Asselbergs

Self-employed certified Realtor / Valuer

Are you sure you are not paying too much for a house? Then Lenneke is a good one for you! As a purchase realtor and valuator, she knows better than anyone what your new dream home is worth. Add to that the fact that she also arranges the right conditions for you and you have a top deal!

team onesta boris

Boris van der Waal

Self-employed realtor in training

It seems a bit confusing, two Borissen in the office. But: double the Boris, double the fun! You can contact this Boris to help you find that new dream house of yours. Boris picks out the properties best suited to your needs, negotiates the best price and makes sure the process goes without a hitch so you can focus on the new colours for the bedroom walls!

team onesta vastgoed


Co-founder and COO Onesta Groep | Financial Advisor

After more than 10 years of self-employment in the real estate and finance sectors, Michan has enriched Onesta Vastgoed with a financial branch. Thus, Onesta Groep was created! Next to his duties as COO, Michan also assists his clients on a daily basis with their mortgage needs.

team onesta vastgoed


Office Manager / Assistant Realtor

Also known as 'the spider in the web'. Behind the scenes she arranges everything within Onesta. And this perticular spider is a real asset to have next to you - ask Michan and Hediyeh! She supports them in getting mortage loans and is co-responsible for the customer journey within Onesta Purmerend.

team onesta vastgoed stephan


Mortgage Advisor

Don't you agree it is alwayts nice to have everything under one roof? With Stephan as an mortage advisor, the purchasing cycle is complete. Looking to buy a property? Then you can go straight to Stephan for the mortgage. You think such a big financial decision is exciting? Of course! But with his calm and carefulness, you would prefer to buy a house every week!

team onesta vastgoed Frans

Frans van der Kraan

Commercial real estate

Opening a new barbershop or catering tent? Then Frans likes to watch with you. Not (just) for a different haircut or a beer, but because he knows everything about corporate housing: rental, sale, lease and purchase. And with his legal background you have a total package right away.

team onesta vastgoed penny

Penny de Kuijper

Office Manager

Everything runs smoothly within the office, thanks to Penny. She takes care of the planning and agendas of all colleagues. Is there an appointment that needs to be rescheduled at the last minute? Don't worry, Penny will fix this. Add a good gose of service orientation, and you have Penny's winning formula!

team onesta vastgoed Manuel

Manuel Barsoumian

Financial Administration Employee

The king of bills! When it comes down to administration and invoicing, Manuel takes care of everything! He also take care of the VAT return and the personnel administration. His affairs are always in order, which is key when it comes to the numbers.

Do you have any questions regarding invoices? Then you need Manuel!

team onesta vastgoed

Jill Vrolijk & Anncy Wicherts


With our interns Jill and Anncy Onesta is complete.


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