Signature Onyx Building
Take your business to the next level with office space in the Onyx Building at Diegem Park 7. Strategically located between the centre of Brussels and Brussels Airport, commuting to your workspace is easy, with plenty of public transport links right on your doorstep.
Designed to encourage collaboration and blue sky thinking, this flexible workspace provides you with all the space and privacy you need to succeed. When the working day is done, hop in a taxi and unwind in one of the nearby bars, restaurants and open green spaces.
Private offices at Onyx Building
Choose one of the private office options below and submit an inquiry — our team will get back to you with availability and exact pricing.
private office
1-person Internal Standard Individual
- Available now
1 people · 6–7 m² · floor G. Indicative monthly pricing: €379/month (24+ month term), €555/month (12–24 month term).
private office
2-person External Economy Office
- Available now
2 people · 9 m² · floor G. Indicative monthly pricing: €758/month (24+ month term), €1,110/month (12–24 month term).
private office
2-person External Standard Office
- Available now
2 people · 8–10 m² · floor G. Indicative monthly pricing: €758/month (24+ month term), €1,110/month (12–24 month term).
private office
2-person Internal Economy Office
- Available now
2 people · 8–9 m² · floor G. Indicative monthly pricing: €758/month (24+ month term), €1,110/month (12–24 month term).
private office
2-person Internal Standard Office
- Available now
2 people · 8–10 m² · floor G. Indicative monthly pricing: €758/month (24+ month term), €1,110/month (12–24 month term).
private office
3-person External Economy Office
- Available now
3 people · 13 m² · floor G. Indicative monthly pricing: €1,137/month (24+ month term), €1,665/month (12–24 month term).
private office
3-person Internal Standard Office
- Available now
3 people · 14 m² · floor G. Indicative monthly pricing: €1,137/month (24+ month term), €1,665/month (12–24 month term).
private office
3-person External Standard Office
- Available now
3 people · 11–13 m² · floor G. Indicative monthly pricing: €1,137/month (24+ month term), €1,665/month (12–24 month term).
private office
3-person External Standard Suite - Small
- Available now
3 people · 11 m² · floor G. Indicative monthly pricing: €1,137/month (24+ month term), €1,665/month (12–24 month term).
private office
4-person External Standard Office
- Available now
4 people · 15–16 m² · floor G. Indicative monthly pricing: €1,516/month (24+ month term), €2,220/month (12–24 month term).
private office
4-person Internal Standard Office
- Available now
4 people · 17 m² · floor G. Indicative monthly pricing: €1,516/month (24+ month term), €2,220/month (12–24 month term).
private office
5-person Internal Standard Office
- Available now
5 people · 20 m² · floor G. Indicative monthly pricing: €1,895/month (24+ month term), €2,775/month (12–24 month term).
private office
6-person External Standard Office
- Available from 1 Jan 2027
6 people · 23 m² · floor G. Indicative monthly pricing: €2,274/month (24+ month term), €3,330/month (12–24 month term).
private office
6-person Internal Standard Office
- Available now
6 people · 23 m² · floor G. Indicative monthly pricing: €2,274/month (24+ month term), €3,330/month (12–24 month term).
private office
7-person External Standard Office
- Available now
7 people · 25 m² · floor G. Indicative monthly pricing: €2,653/month (24+ month term), €3,885/month (12–24 month term).
private office
8-person External Standard Office
- Available now
8 people · 31 m² · floor G. Indicative monthly pricing: €3,032/month (24+ month term), €4,440/month (12–24 month term).
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9-person External Standard Office
- Available now
9 people · 32–33 m² · floor G. Indicative monthly pricing: €3,411/month (24+ month term), €4,995/month (12–24 month term).
private office
12-person External Economy Office
- Available from 1 Nov 2026
12 people · 44 m² · floor G. Indicative monthly pricing: €4,548/month (24+ month term), €6,660/month (12–24 month term).
private office
12-person External Standard Office
- Available now
12 people · 42 m² · floor G. Indicative monthly pricing: €4,548/month (24+ month term), €6,660/month (12–24 month term).
private office
17-person External Standard Office
- Available now
17 people · 63 m² · floor G. Indicative monthly pricing: €6,443/month (24+ month term), €9,435/month (12–24 month term).
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23-person External Standard Office
- Available from 1 Nov 2026
23 people · 87 m² · floor G. Indicative monthly pricing: €8,717/month (24+ month term), €12,765/month (12–24 month term).
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91-person External Standard Office
- Available now
91 people · 455 m² · floor G. Indicative monthly pricing: €34,489/month (24+ month term), €50,506/month (12–24 month term).
Private office facilities
Great for work
- High-speed WiFi
- Fully furnished office
- Utilities included
Services & support
- On-site support and reception
Access & spaces
- 24/7 building access
- Meeting room access
Private offices at the Onyx Building in Diegem
Inquire about a private office in the Onyx Building, set in the prestigious Diegem business park between central Brussels and Brussels Airport. Offices come fully furnished with high-speed WiFi, utilities included, on-site support and reception, 24/7 building access and meeting room access. Request a quote and tour the space to find the right fit for your team. Month-to-month terms keep you flexible as your business grows.
Frequently asked questions
A furnished office with high-speed WiFi, utilities, on-site support and reception, 24/7 access and meeting room access.
Inquire and request a quote, then tour the space to see how it suits your team.
Yes, private offices come with 24/7 building access for your team.
Yes, month-to-month terms give you flexibility without a long-term commitment.
In the Onyx Building in the Diegem business park, close to Brussels Airport and major employers.
What makes Onyx Building special
Onyx Building in the Diegem business park
A flexible workspace in the prestigious Diegem business park, in Brussels' airport-belt district.
Near Brussels Airport
Brussels Airport is a short drive away, with Diegem station about an eight-minute walk.
Well connected in Diegem
Nearby tram stops, the Diegem Bessenveld bus stop and public parking sit right on the doorstep.
How to get there?
The Onyx Building sits on Hermeslaan in the Diegem business park, part of Brussels' airport-belt district between the city centre and Brussels Airport. Brussels Airport is a short drive away, with its railway station and Diegem train station, around an eight-minute walk, providing national and regional rail links. The Eurocontrol and Bourget tram stops and the Diegem Bessenveld bus stop are close by, and public parking sits on the doorstep for those arriving by road. Machelen Town Hall and a range of banking and professional services are nearby, with bars, restaurants and green spaces to unwind after work.
