Most online guides on hiring an interior designer help you compare prices. Very few help you actually choose. Search for anything related to hiring in English and you find fee calculators, US-centric rate breakdowns, and generic advice — but almost no structured guidance on how to pick the right studio for your project. This guide fixes that. It is written for homeowners and businesses evaluating interior designers anywhere in Europe, with specific notes for international clients working cross-border.
What an interior designer actually does
An interior designer plans, designs, and coordinates the full interior of a space. The work goes far beyond choosing furniture or picking paint. Core services include: layout optimisation, coordination with building services and structural engineering, material selection, lighting design, acoustics, tender documents for contractors, trade coordination, and — with serious studios — on-site supervision until handover.
The distinction from related roles matters. A decorator works within existing rooms and selects furniture and accessories. An architect designs the building itself and deals with structure, envelope, and building code. An interior designer sits between these and is the only professional who plans the space from the perspective of how you will actually use it. For projects with structural changes — wall removals, new services, custom millwork — an interior designer is the right choice.
When homeowners need an interior designer
Not every home project justifies a professional studio. If you are swapping furniture or repainting walls, you can proceed without one. But in these situations, a designer typically pays for themselves:
- Full renovation of an apartment, house, or condo involving layout changes
- New construction shell where layout and material selection happen from scratch
- Custom millwork — built-in wardrobes, kitchens, dressing rooms — where errors are expensive
- High-end materials such as natural stone, solid wood, or designer lighting where mis-planning costs real money
- Special requirements: accessible living, multigenerational households, integrated home-office setups
The rule of thumb: the larger the investment, the clearer the return from a professional studio. In practice, design fees are typically 8 to 15 percent of total project cost — and they recover that cost via better material choices, fewer changes during construction, and a result that holds value over time.
When businesses should hire a professional studio
For commercial clients, interior design is not an aesthetic decision — it is a return-on-investment decision. A well-planned restaurant increases average spend per guest. A well-designed office measurably improves productivity (studies consistently show 10 to 20 percent gains) and reduces attrition. A considered clinic increases patient retention. In all these cases, design is a commercial investment, not a cost.
- Restaurants, bars, cafés — from concept to kitchen integration and guest flow
- Hotels and boutique properties where each room category needs individual positioning
- Dental, medical, and aesthetic clinics with high hygiene and patient-experience requirements
- Offices from 300 square metres and up, especially for hybrid-work transitions
- Retail, showrooms, flagship stores, premium boutiques
- Co-working spaces and event venues with high flexibility requirements
Business clients should pay particular attention to industry fit. A studio with an excellent office portfolio is not automatically strong at restaurants. Ask specifically: how many projects have you delivered in my category? If they cannot cite three to five comparable projects, you will be paying for them to learn on your project.
The 12-point checklist
Work through every point of this checklist before signing a contract. Studios that fail more than two points, or that evade the question, should drop out of the shortlist.
1. Professional association membership
In Germany, look for bdia. In Austria, ÖGFA or ZT-Kammer. In Switzerland, VSI. In the UK, BIID. In the US, ASID. Membership is not a guarantee of quality, but it is a first filter against unqualified operators.
2. Documented portfolio of at least ten completed projects
A professional studio publishes before-and-after photos, case studies, and ideally project briefs with scope and duration. Ask specifically for projects in your category — residential, office, hospitality, or retail. A beautiful portfolio of living rooms does not prove restaurant competence.
3. References from past clients
A serious studio will share two or three past-client phone numbers after a qualified first meeting. When you call, ask: was the schedule kept? Was the budget kept? How were problems communicated? Would you hire the studio again? The answers to these four questions are more predictive than anything on a studio’s marketing.
4. Transparent fee structure
Three fee models dominate European markets: fixed-price (lump sum), hourly, and percentage-based (typical in Germany via HOAI). For smaller projects, fixed-price is usually better for clients. For large projects, HOAI-style percentage structures protect both sides. Avoid any studio that will not give you a written, numbered proposal.
5. 3D visualisation included by default
Photorealistic renderings before construction cut change requests during build by roughly 60 percent. Studios with an in-house 3D workflow — not outsourced freelancers — deliver faster and more consistently. Ask specifically: how many renderings are included? Can you produce a VR walkthrough? Will you update renderings as we iterate on materials?
6. On-site supervision from the same team
This is where full-service studios deliver their clearest value. When the design team also supervises construction, there is no “lost in translation” between drawing and execution. On-site issues get solved constructively in the moment rather than becoming disputes between architect and contractor. Studios that deliver plans and disappear leave you alone with tradespeople.
7. Professional liability insurance
Ask for proof of professional liability insurance, with cover that comfortably exceeds your project value. For commercial projects above 500,000 euros, insist on at least three million euros of cover. A studio that cannot or will not produce a certificate is not ready to take on your project.
8. Clear phase-based project plan
Professional studios work in structured phases: brief, concept, design development, technical documentation, tender, construction, handover, and aftercare. Ask for the specific phase breakdown with milestones. If a studio cannot explain their process phase by phase, they are improvising — and you do not want your project to be their learning material.
9. Communication standards
How often will you receive updates? Through what channel — email, project management tool, weekly video calls? Who is your primary point of contact? For projects over six months, communication quality is often the single biggest driver of client satisfaction. Clarify expectations before you sign.
10. Material sourcing and sustainability
Modern studios work with certified materials — FSC-certified wood, Cradle to Cradle, EU Ecolabel. Regional sourcing is increasingly important. Ask for the material strategy and whether the studio will integrate reclaimed or refurbished pieces if you request them.
11. Chemistry in the first meeting
An interior design project lasts months, sometimes over a year. If the first meeting feels strained, the build phase will not improve things. Pay attention to whether you feel heard, whether the studio actively probes your requirements, and whether their response goes beyond what you wrote in the initial brief. Trust your instinct here.
12. Contract terms and IP
Who owns the drawings once the project is complete? Can you switch studios if the relationship breaks down? What deposits are due when? A professional contract addresses these questions in writing before the project begins. Do not sign without reading every clause.
Red flags: when to walk away
From hundreds of discovery calls with clients who came to us after a bad experience elsewhere, these are the clearest warning signs:
- No written proposal or standard contract
- Reluctance to share references
- No 3D visualisation included in scope
- No supervision — plans handed over with no follow-through
- Pressure to sign quickly (“today’s price only”)
- Vague answers to specific timeline questions
- No named project lead
- Materials “sourced as we go” with no paper trail
Hiring cross-border: what international clients should know
A growing number of clients hire studios located outside their home country — typically for cost, design sensibility, or access to multidisciplinary teams that do not exist locally. In practice, cross-border projects work well when three conditions are in place:
- Documented cross-border project history — studios that have never worked outside their home country underestimate the coordination burden
- Local regulations handled explicitly — every country has different building codes, fire safety rules, and accessibility standards; your studio must name the compliance partner on the ground
- Clear site-visit cadence — typically one studio visit per milestone during construction, plus unannounced quality-assurance visits
Studios based in Central and Eastern Europe — particularly Kosovo, Albania, and Serbia — have become increasingly common choices for German, Austrian, Swiss, and UK clients. Lower overheads allow the same level of quality at 40 to 60 percent of Western European rates, without sacrificing materials or supervision intensity.
What a serious project actually looks like
Once you have selected a studio, a professional project typically runs through six phases. Knowing this structure helps you gauge progress and quality throughout.
- Brief and survey (1–2 weeks): interviews, site measurement, use-case analysis
- Concept and design (3–6 weeks): first layouts, mood boards, material direction
- 3D visualisation and sign-off (2–4 weeks): photorealistic renderings, iteration, approval
- Technical documentation (4–8 weeks): working drawings, details, tender packs
- Construction (8–40 weeks depending on scope): trade coordination, quality control
- Handover and aftercare (1–2 weeks): acceptance, user orientation, warranty periods
What actually matters
Choosing the right interior designer is rarely a price question. It is a question of fit between your project and the studio’s capabilities. Three criteria decide almost everything: documented experience in your project category, a full-service model where design and supervision come from the same team, and photorealistic 3D visualisation as a standard part of decision-making. Studios that hit all three deliver on schedule and on budget far more consistently than those that do not.
Doyenne is a multidisciplinary studio based in Prishtinë, Kosovo, combining interior design, architecture, 3D visualisation, and on-site supervision under one roof — with over 230 completed projects, a multilingual team, and experience in both private and commercial work across Kosovo, Albania, and the German-speaking region. If you are starting a project, book an initial consultation with no obligation. We will walk you through exactly how a full-service project runs from brief to handover.
Want to see comparable work? Explore our portfolio or read about our full service offering.
