Coste + Beno has emerged as an architecture and construction company in 2015 when Marius and Beno started their collaboration on a wide range of residential and commercial projects. Together with a creative and highly skilled team of professionals from the construction industry we are delivering high-end design and build projects to home and business owners.

We + Listen

Every project starts with a conversation. At the start of each journey we listen and map all the ideas, thoughts, particularities, constraints, vision and aim the client sets out in the initial brief. The better we listen, the better the project.

We + Advise

Once the project map is set out we respond with a clear concept. We advise on the feasibility and find together what is the best route to take, how to navigate through planning application stage, what procurement method to use and how to deliver the project on site.

We + Identify

What sets us apart from our competition is our ability to genuinely identify with the client. We take the what-if-this-was-my-home attitude, and we look at the project from this angle during all stages to completion and further.

We + Propose

We propose carefully prepared design concept, technical drawings, programme and cost documents to get the project off the ground. We propose strategies and methods to keep the project in budget and on time.

We + Complete

Being able to offer both construction and architectural & professional services means that we can make sure our projects are completed to the highest building standards without compromising its design and architectural qualities.

We + Take Care

Once a project is completed we want to make sure that all the hard work that went into it does not get compromised post-completion by lack of attention or care. We offer maintenance contracts to our clients to help them keep their buildings loved and serviced.

Marius Coste

Co-Founder & Creative Director

Marius is creative and passionate about functionality and design in all the work he does. After completing his architecture degrees in London he was involved in high value residential and commercial projects working for award winning Barr Gazetas architects. Marius takes responsibility role over the governance and relationships of the business with special focus on overseeing all the architectural and design related parts of the business by working closely with the client, trades and local authorities to ensure each project is delivered on time, on budget and to the highest standards.

Marius is an active member in his local community involved in social projects in the design and build environment both locally and overseas.

Beno Bujenita

Co-Founder & Technical Director

Beno is super practical, great problem solver and has a vast technical and hands-on experience gained through his engineering degrees and over 15 years on site experience in the construction industry both in the UK and overseas. Alongside his client relationship roles Beno’s focus is mainly on the technical and logistical side of the business, overseeing the works on site, the tradesmen and making sure that we deliver projects that are practical, innovative, built sustainably and long to last.

Alongside his technical abilities, Beno is a very positive person and always ready to jump in the help of the people around him. He is involved in multiple social projects in his local community and abroad.

What our clients say

Judy Dobias

Founder of Camron PR

“When I needed to totally renovate my house in Primrose Hill I relied on Marius and his team not only to execute the transformation, but to advise from an architectural point of view. They went above and beyond, constantly suggesting practical changes, or evaluating my electrics I was not aware of. The level of personal service and attention was outstanding and the house aesthetic has now exceeded all expectations.”

Paul Harvey

Founder and CEO of Adiona Insurance Group

“We had a very complex multistory renovation project on a six-floor Victorian home. We had all sorts of issues with establishing the right type of scaffolding. Primrose Hill is a conservation area. We had all sorts of limitations with the types of exterior paint, moldings, and window repairs. The quality of the work was exceptional. The team also resolved heating and water issues that we had in the house. You can work in partnership with them. They have a very hard-working team that has the highest quality standards. The Coste Beno partnership is exceptional. You have a world-class architect working with a builder with strong leadership skills. We had one snagging item that needed to be addressed and the team resolve the issue with extreme professionalism. Marius and Beno bring modern design and construction with old school attention to detail. I fully recommend the team.”

Alistair Barr

Founder of Barr Gazetas Architects

“Coste+Beno negotiated us a great planning permission for our house. They produced excellent drawings and specifications and solved many technical issues. As a company they are experienced in balancing a creative vision with practical advice. They are professional and reliable and we have used them since for other advice and permissions”

Brian Leech

I have known Beno for 10 years now and worked with his team on multiple works around my property. I don't think there is a room in the house that Beno hasn't worked on; to name a few the works include structural alteration to the lounge, removal of the chimney breast and installation of RSJs, plastered and redecorated multiple rooms, refurbishment of the bathrooms and kitchen. New garden patio, new fence, flower beds etc. I was happy to leave him and the team work on my property and deliberately went on holiday during the works in full confidence that the house was safe. On my return the house was very clean the the works done to a very high standard. I am continually in touch with them and ask for their advice and services whenever I need any design and construction works done. I do not hesitate recommending Coste + Beno to my neighbours and friends. You might get cheaper price but I doubt that the quality will match that of Beno's team.

Craig Bull

We were lucky enough to be referred to Marius to undertake the renovation of the bathroom at our small flat in Shoreditch. Marius was a dream to work with. We had the added complication of trying to renovate the flat from Australia - Marius kept us constantly up to date with progress, raised any concerns/issues together with suggested solutions, liaised with the suppliers in our absence - and even diplomatically found a way of suggesting better options than our chosen products! We are thrilled with the result. We have no hesitation in recommending Marius and his team for your next renovation.

Mihai Leustean

CEO at Westshore Engineering

Coste & Beno deliver excellent and quality works for construction projects. They have a great and experienced team, outstanding customer care and an impressive attention to detail. We would definitely recommend!

Roger Hughes

An excellent team, thorough, conscientious and trustworthy. Well managed, very good work quality, no cutting of corners or covering up future problems. Highly recommended for any building job.

Gillian Dobias

Coste+Beno are a dream-team! They're so skilled at what they do and wonderfully problem solving. They handled my renovations effectively & efficiently and were so considerate of my space. Marius, Beno & their team are perfectionists and their workmanship exceeded expectations. Trustworthy and thoughtful - I highly recommend them.

Kayan Cheng

Marius helped us produced drawings for our extension and loft conversion to submit for planning and building regulations, which approval was received for both. He did a fantastic job and gave us a lot of advice. He was also very patient with us while listening to our ever changing requirements. I would highly recommend Marius and would not hesitate to use him again if I ever need a similar work done.

Lauren Creaven

Marius has been our architect, working with us to design a rear and side extension on our semi detached house in Oxhey Hall. The design includes repositioning the stairs and main bathroom, creating an open plan kitchen and living area, extending the third bedroom and adding a bathroom downstairs. Marius completed the technical drawings, applied for planning permission and permission to move the drains with the water supplier. He has also been available to liaise with our builder and party wall surveyor to ensure we were able to start the build with no complications. Our house is in a conservation area, Marius has had a good understanding of this, which is reflected in the plans being agreed. Marius has always been approachable and willing to help. He is very conscientious and a listened to what we wanted, allowing us to be creative but realistic. We would highly recommend Marius, he has made the daunting process of applying for planning permission a lot less stressful than imagined. It has been a pleasure working with him.

Stephen Groom

Marius was a pleasure to work with. He came up with great design ideas & drawings, took care of all the planning and structural requirements. In addition, Marius made the time to explain the whole process to us, provided guidance & recommendations when we needed it and answered our numerous questions (it was our first home improvement project). And when we hit a major snag during the build, Marius was incredibly helpful & speedy in finding a solution. Wouldn't hesitate to recommend, and hope to be working with Marius in the future