Portfolio and design questions

Select projects showing range (residential and commercial if you have both, different scales and budgets), process alongside outcomes (mood boards, space plans, material samples, 3D renders, site photographs), and genuine contribution. Be ready to discuss two or three projects in depth: the brief, your concept, key decisions, challenges, and outcome. "Tell me about a project where the brief changed significantly." Budget revisions, client changes of mind, and site discoveries are common. Show professional adaptability, clear change management (scope changes have cost and programme implications that should be formally agreed), and maintained design quality through the change.

Design process questions

"Walk me through your process from brief to completed project." Initial consultation (brief, lifestyle, aesthetic preferences, practical needs, budget, programme), site survey (existing conditions, light, proportions, services), concept development (moodboards, spatial planning), design development (detailed space plans, material and finish specifications, FF&E specification), technical drawings for contractors, procurement and project coordination, site visits during fit-out, snagging and handover. "How do you develop a client brief when the client does not know what they want?" Design questionnaires and reference image exercises (asking clients to share images they love and explain why) are more effective than abstract questions like "what style do you like?" Budget reality-checking early prevents painful scope revision conversations later.

Technical questions

"What CAD or design software do you use?" AutoCAD (technical drawings), SketchUp (3D visualisation), Revit (BIM — required for commercial and hospitality), Adobe InDesign (presentations), Photoshop, Enscape or Lumion (real-time renders), 3ds Max or Cinema 4D (photorealistic renders). "What do you understand about building regulations relevant to interior design?" Residential: Part M (accessibility), Part B (fire safety), Part E (sound). Commercial: fire safety (escape routes, fire doors), Equality Act (ramp gradients, door widths, accessible toilets), CDM regulations (designer duties for health and safety in construction).

Client management questions

"How do you manage client expectations around budget and timeline?" Set realistic expectations at outset (realistic budget ranges, contingency in the programme, transparency about variables), communicate proactively when issues arise, document all cost changes in writing. "Tell me about a difficult client relationship." Show professionalism, empathy, clear communication, and appropriate boundaries where design integrity or professional standards were at risk.

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Frequently asked questions

What qualifications do you need to be an interior designer in the UK?
Interior design is not a protected title. Professional routes: BA or MA in Interior Design from a BIAD-accredited course, followed by membership of BIID (British Institute of Interior Design). BIID membership requires formal education, relevant work experience, and a professional competency review. BIID-chartered designers signal professional credibility to clients and employers.
What is the difference between an interior designer and an interior decorator?
Interior designer: formal qualifications, works across spatial planning, specification, and technical coordination with contractors, handles both aesthetic and functional aspects including structural changes. Interior decorator: focuses on decorative elements (colour, furnishings, soft furnishings) without structural scope. The distinction matters most for commercial and hospitality projects with significant technical and regulatory requirements.