About us

Grand&Johnson is a design studio born from a love of interior and product design.

Under the watchful eye of owner Bertel Grote, Grand&Johnson has grown into an intimate team of interior designers. A design studio in which interior design is carried out with pure attention to detail.

Grand&Johnson specialises in large-scale renovation and new construction of both residential houses and offices. All this is carried out sustainably to a very high standard and is fully customised.

The design studio is located in ‘de Hallen’ in Amsterdam.

The perfect design by Grand&Johnson arises from the interplay of everything and everyone involved, in which all the details come together and form a unity. A design with a story, a small world in itself. We are constantly looking for balance in contours, shapes, light, colours and materials.

“Every room is a marvel to behold, the whole forming a unity.”

Working method

Kick-off session

Every project at Grand&Johnson starts with a “Kick-off session”. A face-to-face meeting in our studio in which time is taken to get to know each other and the project better. We believe that understanding the client’s needs is the basis of success for any project. During this session, all specific needs, dreams, wishes and requirements are discussed. The aim is to explore the opportunities and possibilities of the home or business premises and together give direction to the design. This is worked out on the spot to come to a concept in sketch form. This shows you what Grand&Johnson’s style and way of working is.

If it feels good from both sides, this session is the starting point to go into further depth with each other. It also offers the flexibility to take a different approach to the follow-up. The cost for the kick-off session and concept idea is €1,495.00 including VAT, which will be deducted in the event of further collaboration.


After the Kick-off session, work continues on the design. This comprises several phases in which our team elaborates every aspect of the aesthetic design. This involves a sketch design consisting of floor plans, 3D visuals, various mood boards and an outline of colours and materials to be applied. The presentation of these gives a concrete picture of Grand&Johnson’s design vision.

The comprehensive design is further shaped. The custom-made furniture is designed in detail and worked out in various views. Lighting advice is given by means of a lighting plan and an overview with all colour and material finishes is worked out at this stage. These documents serve as the basis for the construction team.

After this phase, the proposal with upholstery, loose furniture, styling and art is further specified so that the necessary orders can be placed in time.

Grand&Johnson | werkwijze

During the implementation of the plans, Grand&Johnson’s team provides aesthetic construction supervision to realise the design. Together with reliable partners, both within our own network and that of the client, we form the construction team that strives for an optimal final result. Depending on the need, we provide full project management and construction supervision during construction/renovation, in the form of an external project manager.

Grand&Johnson stands alongside the client throughout the project. We monitor the plan and the desired elaboration and are committed to an end result that exceeds expectations. Partnership and unburdening to the last detail.


Bertel Grote & Jeroom Jansen combined their extensive experience in interior design and founded design studio Grand&Johnson in 2010. From different starting points, they shared a passion for interiors, art and design. In 2021, Jansen decided to continue under his own name as a product designer and artist.

Our belief

People want to marvel. Grand&Johnson pays tribute to wonderment. An ode to that which adds colour to life.

The unexpected, the engrossment, the details, that is what we aim for in each design. By changing the perspective and by colouring outside the lines. It is an art to be able to marvel.

For us, no design is self-evident. Rather, it is a world of its own, in which the beautiful can turn into the breathtaking, silence passes over into serenity and excitement becomes exhilaration once more. A world in which to see things you have never seen before.

An eye for wonder.

Our project partners

Atelier Vierkant

Ceramic pots

Baars & Bloemhoff

Decorative panels


Solid wood veneer


Customised doors

Buro Buiten




Co van der Horst

Home furnishing shop


Decorative panels

Ebony and Co

Wooden floors


Kitchen appliances


Interior construction




Door hardware







M.E. Estates

Private brokerage Marbella | Sotogrande

Rianne Landstra

Interior styling


Cast floors

Sjartec – Agape


Sonos by JI

Sound experience

Van der Wolf

Furniture spray painting


Leather atelier


Vintage vases