Six Advocaten > Amsterdam, Netherlands > Firm Profile

Six Advocaten

Netherlands > Construction Tier 2

Boutique firm Six Advocaten specialises in real estate, construction, regulatory and procurement law, enabling them to advise on the full range of construction law issues. The team assists on a variety of projects including data centres, housing, logistics, and retail. The practice stands out for its work on infrastructure projects where it has assisted public entities with motorways, railways, and wet infrastructure. Public procurement and construction disputes also forms another part of the practice. Construction expert Fabian Horsting typically handles litigation issues and has experience with procurement and construction disputes. Founding partner Wouter Post mainly advises on project development.

Practice head(s):

Fabian Horsting

Other key lawyers:

Wouter Post; Erik Verweij; Daniël van Veen


‘Small team of lawyers who provide hands-on advice’.

‘Wouter Post is a reasonable lawyer with not only pointing out risks but also downsizing these risk and suggesting solutions to handle these. So when you want to make progress you should be able to build bridges and Wouter is able to do this and also gets the sympathy of the opponent company.

Key clients

Amrâth Hotels & Restaurants B.V./ De Lelie Vastgoed

AM Vastgoed B.V.

CBRE Development

Ballast Nedam Development

De Lelie Vastgoed




Hoogheemraadschap Hollands Noorderkwartier (Water Authority)

Vrije Universiteit (VU, Free University)

Province of South Holland

MN/Pensionfund for Metal and Technology Industries





Work highlights

  • Advising De Lelie Vastgoed/Amrâth Hotels & Restaurants on the construction of Galaxy Tower Utrecht, an inner-city development in Utrecht Jaarbeursplein (100 mio plus).
  • Advising a joint venture of Ballast Nedam Development and Volker Wessel on the redevelopment of the Market Quarter in Amsterdam.
  • Advising De Alliantie on the development of a major housing project in Almere. The acquisition is part of a larger project consisting of approximately 1200 houses, commercial areas, public facilities and parking spaces.

Netherlands > Environment and planning Tier 3

Irma Van Den Berg, recognised for her provision of ‘well-thought through advice’, is at the helm of Six Advocaten‘s environment and planning practice. The team advises its portfolio of clients on a broad scope of matters, often including sustainability and ESG aspects of projects. it is also well equipped to handle zoning and permitting issues, which constitutes Anita Nijboer‘s particular area of expertise. ‘Sharp litigation lawyer’ Fleur Onrust, who joined from ENVIR Advocaten in March 2023, has a niche focus on nature conservation. Hanneke Ellerman is also key to the practice.

Practice head(s):

Irma van den Berg


‘Six Advocaten are formed of experienced, hands-on partners with good overall knowledge of the market and market practice, both from a domestic and from an international perspective – they understand the type of work product international clients like to see and we gladly engage them for real estate matters.’

‘Irma van den Berg is friendly, knowledgeable, available and responsive.’

‘They provide strong and professional info and advice in a timely fashion.’

‘Irma van den Berg gives her well thought-through advice and strategy and she comes up with strong solutions. It feels that lawyer and client are regarded as a team.’

‘Fleur Onrust is a very knowledgeable and sharp litigation lawyer with a keen eye on the regulatory framework, litigation strategy and legal process impact.’

Key clients

Amrâth Hotels

Bouwfonds Property Development (BPD)

Province of Limburg

Municipality of Amsterdam


Avandis (Lucas Bols)

CBRE Global Investors

Museum Voorlinden

Janssen de Jong


Nationale Politie

Work highlights

  • Advised and litigated for GEM Bloemendalerpolder on a multi-phase urban development of 2.750 residences, which included complex regulatory issues in relation to nitrogen emissions, nature conservation, spatial planning and the hydrological regime.
  • Advised Avandis (Lucas Bols) on a revision of its environmental permit.
  • Advising the province of Limburg in relation to the expansion of VDL Nedcar’s production facilities and litigating for the province about permits based on the Nature Conservation Law for infringements on protected species.

Netherlands > Real estate Tier 4

Boutique firm Six Advocaten focuses on real estate, construction, regulatory and procurement law. On the real estate side, it handles litigation, transactional and advisory work for its clients. The team is adept at handling regulatory issues related to landlord and tenancy law as well as leasing, project redevelopment, and sales and acquisitions. Team lead Femke Borst is a go-to for landlord and tenancy-related issues, and she is also well versed in mixed-use lease contracts and qualification of use matters. Jeroen Kist is popular among German and Austrian clients in property transactions and property management.

Practice head(s):

Femke Borst

Other key lawyers:


‘One of the first “boutique” law firms in the market. Really approachable firm, top notch quality and in depth knowledge of the sector. ’

‘Femke Borst is our go to person for tenancy law. Very down to earth, approachable lawyer who has in depth legal knowledge. Nonetheless Femke maintains a commercial view and really understands the broader interests at stake.’

‘What makes Femke Borst stand out from others is that she has an enormous knowledge of tenancy law. She knows every aspect of this field and she is extremely strong in translating very well into practice. Femke knows how to convert the needed knowledge into the right process. I would always recommend her when it comes to tenancy law related matters. In my opinion she does an extraordinary job and delivers high quality results. Besides this, she is also very good at negotiating.’

‘SIX law firm is already long involved in our business making their (historical) knowledge and the ‘fit’ within our business a key factor of their engagement. Their expertise in the field of the advice we are looking for is great.’

‘They are nice personalities understanding what our business is asking for and needs, making their advice fit for purpose. Femke Borst for example is very pragmatic, able to discuss topics on the phone and provide you with hands on advice which results in being able to act and react fast.’

‘Six fields an experienced, hands on, partner driven team with good overall knowledge of the market and market practice, both from a domestic and from an international perspective – they understand the type of work product international clients like to see and we gladly engage them for real estate matters.’

‘Very good knowledge of all related issues for building permits and developments. Not only one way discussion but me as client and legal advisor working on strategy as team.’

‘We like to work with Femke Borst. She has a profound knowledge of landlord and tenant law, and wider real estate law. She is also very service minded and a great person to work with.’

Key clients

De Lelie Vastgoed

CBRE Global Investors

Amvest Development RE

NorthWest Healthcare Properties REIT

Paribus Immobilien Assetmanagement GmbH

Work highlights

  • Advised and litigated on behalf of CBRE Global Investors in matters relating to lease, construction and development, zoning, and other regulatory matters.
  • Advising Amvest on a redevelopment project in Tilburg, which involves the demolition of a building block and the realisation of a new housing block with care facilities.
  • Assisted Alpha Packaging with the negotiations and drafting of the A –B and B – C sale and purchase of an industrial property in the south of the Netherlands.

The firm: Six Advocaten is a niche boutique law firm primarily focusing on real estate. Clients include real estate professionals and local government authorities.

The firm was launched in 2008 by a group of lawyers who combine expertise from leading international law firms. The lawyers of Six work closely together and form a tightly knit team. Six Advocaten is proud of the excellent reputation it has acquired since it was founded. The firm’s reputation is characterised firstly by a high degree of specialisation – PropertyNL, the largest independent research centre for real estate in the Netherlands, refers to the part played by Six Advocaten as one of the ‘true specialists’ in the field of real estate.

Secondly, it maintains a personal approach – its key client satisfaction survey showed that the firm set itself apart by its personal attention to each client and each case. Clients appreciate that it maintains a low leverage strategy (‘partner on the job’). ‘Six Advocaten stands close to its clients.’ Six Advocaten aims to work with, rather than for, its clients. By taking an active interest in its clients business, Six Advocaten aims to acquire more and more in-depth knowledge on the real estate sectors its clients are part of. This enhances the quality of the firms’ work, as well as its efficiency. Six Advocaten aims to be practical and pragmatic in its advice and its lawyers do not hesitate to say the things a client would perhaps rather not hear.

Six Advocaten has managed to secure a solid position in the Property Lawyers List, drawn up by the leading real estate market magazine PropertyNL, on the basis of an annual survey of the most prominent property law firms in the Netherlands.

Areas of practice: Topics on which the team at Six Advocaten advises include property development, land policies and land exploitation, procurement, building contracts such as contracting projects and architectural law, landlord and tenant law, buying and selling real estate and rights in rem such as long leases, building rights, apartment rights and servitudes.

Benno den Teuling is highly sought after as a specialist in the field of damages caused by delay in the building process. Acting on behalf of both commissioning companies as well as builders, he is a leading expert in this field and has written numerous publications on this matter. Hanneke Ellerman frequently handles procedures involving the provincial by-laws (provincial verorderingen) and the ‘ladder for sustainable urbanisation (Ladder voor duurzame verstedelijking). Irma van den Berg has broad experience when it comes to the transformation of historic, and industrial, heritage. Six, as a team, has been involved in several high-end hotel development projects, such as the development of the Hoxton Amsterdam, A&O Hotels, hotel Jakarta and the Double Tree by Hilton Hotel in Amsterdam. Its involvement pertains to all aspects, from building and construction to operational matters and drafting all kinds of contracts relating to the development. Six is, to an increasing extent, involved in due diligence research in relation to the acquisition or refinancing of large real estate portfolios.

By combining its expertise and experience the firm is able to advise clients in all fields of real estate and at every stage of the real estate cycle.

Department Name Email Telephone
Real estate transactions Leon Burgersdijk
Real estate transactions Wouter Post
Procurement and state aid Fabian Horsting
Procurement and state aid Benno den Teuling
Construction Benno den Teuling
Construction Wouter Post
Lease Femke Borst
Property and area development Leon Burgersdijk
Property and area development Wouter Post
Planning and zoning Irma van den Berg
Planning and zoning Hanneke Ellerman
Environmental Irma van den Berg
Environmental Hanneke Ellerman
Government liability Irma van den Berg
Government liability Fabian Horsting
Litigation, arbitration Benno den Teuling
Litigation, arbitration Leon Burgersdijk
Litigation, arbitration Fabian Horsting
Lease, sale and purchase transactions Jeroen Kist
Photo Name Position Profile
Femke Borst photo Mrs Femke Borst Femke Borst has a profound knowledge of landlord and tenant law and…
Leon Burgersdijk photo Mr Leon Burgersdijk Leon Burgersdijk specialises in construction law and real estate law. He has…
Benno Den Teuling photo Mr Benno Den Teuling Benno den Teuling is active in all areas of private building law.…
Hanneke Ellerman photo Mrs Hanneke Ellerman Hanneke Ellerman specialises in administrative law and planning and zoning law. She…
Fabian Horsting photo Mr Fabian Horsting Fabian Horsting specializes in real estate law, with a particular focus on…
Jeroen Kist photo Mr Jeroen Kist Jeroen Kist specializes in civil real estate law. He focusses mainly on…
Dorsa Mohammadi photo Ms Dorsa Mohammadi Dorsa Mohammadi specialises in administrative law (planning and zoning law). She advises,…
Wouter Post photo Mr Wouter Post Wouter Post joined the Amsterdam Bar in 1994. Since 2001 he has…
Irma Van den Berg photo Ms Irma Van den Berg Irma van den Berg specialises in general administrative law and planning and…
Daniël van Veen photo Mr Daniël van Veen Daniël van Veen specialises in real estate law. He advises and litigates…
Number of lawyers : 12

Our mix of different backgrounds and personalities is what defines SIX advocaten. We believe in an open and non-hierarchical work environment, where everyone is free to voice their ideas. We use each of our individual strengths and consult and support each other in our aim to provide the best possible service to our clients. All of our partners are highly-regarded experts in their field of law. We understand you have a business to run and want to understand your business. We strive to provide practical and hands-on solutions. We take an active part in the legal community. One of our partners, Irma van den Berg, is the president of the board of Lawyers for Lawyers (L4L), an independent and non-political Dutch foundation that supports and enables lawyers all over the world to do their work as lawyers freely and independently.

L4L has been granted Special Consultative status with the UN Economic and Social Council. Our partner Hanneke Ellerman is a member of the Supervisory Council of the National Bar Council and is Chairwoman of the Review Committee of the Centre Urban District of Amsterdam. Wouter Post is a member of the Legal Policy Recommendations Committee of the Royal Institute of Dutch Architects BNA. Our partner Femke Borst has been a mentor to younger women in the field of real estate for the past two years and assists these women in achieving their personal goals. Benno den Teuling teaches construction law at university and our firm regularly has student traineeships. All our partners regularly teach and contribute to several professional journals.