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About

Three people, one office at Slepersvest.

No management layer, no account managers. What you read on the home page is all there is — Roelof, Coert, Onno. The longer version below.

01 — How we started

Above a bike shop, 2008.

Nultien began in 2008 above a bike shop on the Schiekade. Roelof had one desk, one phone, and an appointment with a seller who didn't show up. The second appointment did. When that one talked to the third, a fourth came in. It still works that way: no big Funda banner ads, no mailings — just people telling people. Coert joined in 2014, Onno in 2019. We are three now. That is enough.

02 — Why only 26 deals a year

It's a calculation, not marketing.

We figured out what we can carry without it becoming rushed. Eight or nine cases per agent at the same time — more and the callbacks slip past the hour mark, more and the viewings turn into routine instead of attention. Other firms run hundreds of transactions a year. That can be done, there is good work in there. We do it differently. Twenty-six is not a marketing number. Sometimes there is a waiting list. That is awkward, but it is what it is.

03 — The team

Three people.

R

Photo soon

Roelof Bakker

Eigenaar & makelaar

Founded Nultien in 2008 from a one-desk office above a bike shop. Specialises in Hillegersberg and Kralingen. Talks slowly, picks carefully.

Sales · upper-segment · Hillegersberg + Kralingen

roelof@nultien.nl · 010 — 240 30 31

C

Photo soon

Coert Veenstra

Makelaar & NWWI-taxateur

Twelve years in, still smitten with pre-war houses. Also does the valuations — one hour at yours, the report three days later.

Sales · pre-war character properties · NWWI valuations

coert@nultien.nl · 010 — 240 30 32

O

Photo soon

Onno de Vries

Aankoopspecialist

Walked the city as a building surveyor; knows which property hides a damp problem and which doesn't. Keeps bids cool even when you can't.

Buy-side · expats + investors · structural eye

onno@nultien.nl · 010 — 240 30 33

04 — Reviews

9.7 on Funda

Across 47 reviews from 2025.

Read all 47 reviews →
Roelof gave us the room to think for two months, while other agents pushed for a decision in a week. When we said yes, everything was prepared down to the last detail.
Familie De Wit · Hillegersberg, maart 2025
Coert took his time with the valuation. Not a checklist — a real conversation. The bank accepted the report on day one.
Mr. Vermeer · Kralingen, January 2026
Onno walked our apartment in Rotterdam while we were still in Singapore. Honest video call, no varnish. Two weeks later we owned a home we'd never set foot in.
Aiyana K. · Wilhelminapier, March 2026

05 — Memberships + certification

Where we are registered

Every Nultien transaction goes through these checks and balances. No shortcuts — and you can verify everything below in the public registries.

  • Member of VBO Makelaar / Vastgoed Nederland — Dutch professional body for estate agents
  • Coert Veenstra is an NWWI-validated valuer since 2014 — every report goes through the NWWI independent check before being released to your bank.
  • Recognized SCVM-VCM agent in property advice
  • Disputes via SGM (Stichting Geschillencommissies Makelaardij) — independent arbitration if we ever can't resolve it together
  • Professional liability insured up to € 1.5M per claim

Address

Slepersvest 5, 3011 MK Rotterdam

Founded

2008

Ready for a first conversation?

Fifteen minutes with Roelof, Coert or Onno — call us, or have us call you.

Schedule a meeting