Architecture & Interior Design for Developers and Commercial Projects in Europe

6+ years of practice

Structured process

100+ projects delivered in 10 countries

Predictable results

Contemporary kitchen design with oak tabletop

We design architecture and interiors that increase
the value and market appeal of residential
and commercial properties — from concept to full project documentation and implementation support

Discuss Your Project
Luxury bedroom interior with natural materials and arts pieces

We Work with Projects Where Design Is a Business Decision

Trusted by international developers, private investors, private owners and entrepreneurs

Residential complexes, aparthotels, mixed-use and commercial developments. We create concepts and documentation aligned with market positioning, target audience, and project economics

Developers & Investors 

Offices, hospitality, retail, and public spaces. Design solutions focused on functionality, brand perception, and long-term use

Commercial Projects 

Private houses and high-end residences. A full-cycle approach — from planning solutions to interior implementation

Private Clients 

Request a Project Proposal
Open-space living area with premium lighting and bio fireplace

Stages of work

Trusted by international developers, private investors, private owners and entrepreneurs

We start with developing several planning solutions and design concepts to define the future image of the project before significant costs begin.

What you get at this stage:

  • 3–4 planning solutions based on project goals and site conditions

  • Design direction aligned with target audience and market positioning

  • A clear conceptual vision to validate decisions early

1/ Concept & Planning
 

At this stage, we transform the approved concept into detailed design solutions and 3D visualizations.

What you get at this stage:

  • Finalized furniture and equipment layouts

  • 3D visualizations of key spaces

  • Style collages and material references for typical zones

2/ Design Development & Visualization
 

We prepare a full set of working drawings and specifications required for accurate implementation.

What you get at this stage:

  • Complete working drawings and layouts

  • Detailed material, furniture, and equipment specifications

  • Technical documentation for contractors and suppliers

3/ Technical Documentation
 

Modern open-space living area with natural materials

Our approach to work

A transparent and structured process designed for complex projects

Architectural lighting Ingo Maurer detail in modern space

We begin with a structured briefing and project analysis to define goals, constraints, and success criteria before any design decisions are made

1/ We begin with a detailed briefing

2/ We work according to the contract and stages

Each project is delivered under a formal contract and structured into clear stages with defined scope, timelines, and deliverables

To ensure consistent coordination and decision-making, a permanent project team and a single channel of communication are appointed

3/ Single channel of communication

We support the project during the implementation phase to ensure that the approved design solutions are accurately implemented on site

4/ We support implementation

Start a Project Discussion
Luxury bedroom interior with natural materials

We design interiors that reflect your lifestyle, refined, functional, and effortlessly modern. Based in Lisbon, we work on exclusive projects across Europe

Our projects

Interior design project with bright color palette
View projects

Our team

We work with expert construction partners to ensure flawless execution and the highest quality standards

Luxury bathroom design with natural stone finishes
Contemporary restaurant space with open kitchen

About us

Astra Mente Katerina Maremyanina Ekaterina Pupreva

MA in Relational Design (Abadir Academy, Italy) and BA in Product Design (UK). Expertise in interior design, product design, and yachts

Astra Mente

Katerina Maremyanina

BA in Architecture, 15+ years in private residential and interior design

BA in Architecture, specialization in heritage restoration. Experience in public, commercial, and restoration projects

Ekaterina Pupreva

Сontact Us

K&K Architectural Design

K&K Architectural Design

  • "K&K was the first studio I approached for design. They shared their ideas and inspired me to come up with new ones. Not only did I learn a lot of useful information, but I also solidified my vision, discarded unnecessary ideas, and cast aside most of my doubts"

    LORA TEREKHOVA

  • "I contacted the studio when I was building my own house. Since I had absolutely no construction experience, the girls suggested how to best transform the space to make it feel like home, and they selected furniture and decor. The house is ready, and I'm very happy with the result!"

    SERGEY BORISOV

  • "I had a very pleasant experience working with K&K. They are responsible and creative designers. The work was completed on time, and their ideas were clearly communicated. Thank you for the pleasant collaboration!"

    DES AIRAN

  • "I've always admired the aesthetics of the interiors created by K&K designers. Besides the aesthetics and professional approach, I'm very pleased with the positive communication. I highly recommend this studio!"

    ALEX BELOV

  • "Working with them reflects professionalism and commitment to time, as my project (sport club) wasn't simple to do redesign for the space and put all the requirements that I need with perfect design, they have patience to understand the requirements, and above that creativity in the work with simple elegant output. Dealing with them is easy and comfortable. They have sense of humor with professionalism in work, my pleasure working with you K&K"

    DOHA SALAH