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Architect or interior designer: who to choose and what you need to know

Arch. Katerina TanevaUpdated November 20264 min read
In short

An architect designs the building – its volume, structure, façade, layout and approval by the municipality. An interior designer designs the interior space – function, materials, lighting, furniture and details. For a new house or changes to load-bearing elements you need a licensed architect. For an apartment renovation without structural changes – an interior designer. The best result comes when the two work together from the start.

“Do I need an architect or an interior designer?” – this is one of the most common questions we get. The answer depends on what you are going to do: a new building, a conversion or a renovation. In this article we explain the difference clearly and without jargon, so you know who to turn to.

The difference between an architect and an interior designer

ArchitectInterior designer
What they designThe building – volume, façade, structure, layoutThe interior space – function, materials, furniture, lighting
LicenceMember of the Chamber of Architects; can sign designs for a building permitCannot sign designs for building permits
Typical tasksNew house, extension, conversion, public buildingRenovation and furnishing of an apartment, house, office
DocumentsArchitectural design, coordination with engineers and the municipalityInterior design: layout, visualisations, working drawings, specifications

In practice the line is not so sharp. Many architects also design interiors, and a good interior design always respects the architecture. At DOMO projects are led by Arch. Katerina Taneva – a licensed architect who works on both the architecture and the interior.

Architectural model of a modern house with drawings and sketches
An architect thinks about the whole building – volume, light, structure and its place in its surroundings.

When you need an architect

  • A new house or building – a building permit requires an architectural design by a licensed architect. Find out more about house design.
  • An extension, an extra storey or a change to the façade.
  • A conversion with changes to load-bearing walls – with the involvement of a structural engineer.
  • A change of use – for example from a shop to a home or office.
  • Public buildings – restaurants, offices, shops with specific fire safety and accessibility requirements.

You will find more about DOMO's architecture services on the page Architect Varna.

When you need an interior designer

  • An apartment renovation without structural changes.
  • Furnishing a new home – from plastered walls to turnkey.
  • A kitchen, bathroom or single roomthat you want to rethink.
  • Custom furniture – wardrobes, TV walls, kitchens.
  • Lighting and materials – when you want everything to work together.

Interior design includes a functional layout, concept, 3D visualisations, working drawings and specifications. See in detail what is included in the interior design project.

Interior designer's moodboard with material samples and a visualisation
An interior designer turns ideas into materials, furniture and light.

When you need both

When you are building a house, it is best for the architect and interior designer to work together from the concept design stage. Then:

  • The windows are positioned according to the furniture and the views.
  • The services (plumbing, electrical, ventilation) are planned around the kitchen and bathrooms.
  • The ceilings have the height for hidden lighting.
  • The staircase, fireplace and built-in furniture are part of the architecture, not added later.

This avoids costly rework when the interior starts after the house has been built. An example of this integrated approach is Zen House.

How to choose the right specialist

  1. Look at the portfolio. Do you like the style? Are there projects similar to yours? Have a look, for example, at DOMO's projects.
  2. Check the licence. For building projects the architect must be a member of the Chamber of Architects in Bulgaria.
  3. Ask what the service includes. Concept only, or working drawings too? Is design supervision included?
  4. Discuss the budget openly. A good specialist will tell you what is realistic.
  5. Trust your instinct. You will work together for months – communication matters.

Questions to ask at the first meeting

  • What stages does the project include and how long does each take?
  • How many revisions are included?
  • Do I get working drawings and specifications?
  • Do you offer author supervision?
  • How is the price determined and what is not included?
  • Do you work with trusted contractors and furniture makers?
“The best projects happen when architecture and interior are thought of together – as one whole, not as two separate stages.” – Arch. Katerina Taneva

Frequently asked questions

Can an interior designer remove a wall?

An interior designer can propose the change, but if the wall is load-bearing you need an opinion and a design from a structural engineer, and often approval from the municipality.

Do I need an architect for an apartment renovation?

If there are no changes to load-bearing elements or the use of the property, it is not required. An interior design project is enough.

Can one person be both an architect and an interior designer?

Yes. Many architects also work on interiors. At DOMO projects are led by an architect who takes on both.

When is the best time to hire an architect for a house?

Even before buying the plot – the architect can assess what can be built and how to orient the house towards the sun and the views.

Who monitors the work on site?

That is design supervision. The designer visits the site and checks that the work matches the design.

Not sure what you need? Tell us about the project and we will point you in the right direction.

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Arch. Katerina Taneva
Arch. Katerina TanevaArchitect and founder of DOMO. Member of the Chamber of Architects in Bulgaria, with more than 15 years of practice and 150+ completed projects.
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