Design Project Essentials: A Practical Guide for European Renovations

Why commissioning a design project matters for a European renovation

Renovating a home without a clear design plan often follows a familiar pattern: decisions are made on the fly, budgets drift, and the final result bears little resemblance to the initial vision. In practice, the value of a professional design project (DP) goes far beyond aesthetics. It provides control, precision, and a realistic route from concept to completion.

In this article, we explore a real-world approach to interior design documentation. A design project is not a formality, it is a working tool that keeps a complex renovation on track, within budget, and aligned with daily life.

We consider a European apartment as our reference point, illustrating how a robust DP can manage the realities of a city renovation - where space is precious, trades operate on tight schedules, and you need clear benchmarks to avoid cost overruns. Below we break down what the DP contains, what each section delivers, and how to start the process with a trusted design studio.

From €1,500/m² is a typical starting point for an authorial DP by professional designers who account for technical detail as well as aesthetics. A well-structured DP includes both visual exploration and precise technical documentation, forming a practical blueprint for the project.

Key sections of a design project: what the client documentation should contain

A design project is a technical map of the renovation, composed of two interlinked components: a creative (visual) strand and a technical (construction) strand. The absence or incomplete development of either part complicates the process and can jeopardise the final outcome.

Part 1 (visual): Concept development (timeline: 1–3 weeks)

This stage explores and settles the design idea. The goal is to answer: what do we want to achieve in terms of function and aesthetics?

1.1. Brief (Terms of Reference) and measured plan

What this is: The foundation of every project. We capture your lifestyle, space requirements, and budget. Precise measurements of every room are taken, including door openings, radiators, and engineering services (risers, ducting, electrical panel).

Why it matters: To ensure every decision is grounded in reality, not a builder’s approximation. A mistake at this stage often leads to costly revisions on site.

1.2. Layout studies (2–3 options)

What this is: Several fundamentally different furniture arrangements and zoning schemes. We experiment with walls, door openings, and traffic flow to establish the logic of movement through the home.

Why it matters: To select an optimal layout rather than the first convenient option. A robust choice supports long-term comfort and adaptability.

1.3. Stylistic collage (moodboard) and material palette

What this is: A curated collection of images that communicates atmosphere, primary colours, textures and finishes. It gives early direction on furniture styles and surface treatments (laminates, tiling, paints).

Why it matters: It allows you to feel the future space before it exists and forms a visual contract on style and tone.

1.4. 3D visualisations from key vantage points

What this is: Photorealistic renders of the interior from multiple angles. The pieces from the moodboard and plans come together in a coherent volumetric idea.

Why it matters: The primary tool for alignment and decision-making. You see how colours, materials, light and space work together. Once the 3D visuals are approved, the project moves to the technical drawing phase.

Comparison: moodboard vs 3D visualisation

Aspect	Moodboard	3D Visualisation
Purpose	Quickly communicates style, palette, and spatial feel	Shows precise spatial relationships, finishes, and lighting
Timing	Fast to produce, good for early decisions	Longer lead time, used for final validation
Realism	Conceptual, scale and proportions may be approximate	High fidelity, accurate proportions and lighting
Best use	Understanding style direction and room mood	Validating materials, colours, and layout details

Part 2 (working): Construction drawings for builders (timeline: 2–4 weeks)

If the sketch renders “what to build”, the working drawings answer “how to build it exactly”. This is a complete set of drawings used by trades during construction and renovation. Below is a typical composition of the design project for an apartment, with explanations and examples.

2.1. Demolition and partition plans

What this is: Clear schematics indicating which walls to remove or build, with materials and precise dimensions.

Why it matters: To prevent removing a load-bearing wall or misplacing a new partition.

2.2. Plumbing layout

What this is: Positioning of sanitary fixtures (toilets, basins, baths, showers), sinks, washing and dishwasher areas with pipe routing.

Why it matters: Ensures plumbing lines are set during rough-ins in the correct places.

2.3. Ceiling plans

What this is: Drawings for ceiling types (drywall, suspended ceilings), levels, lighting positions, coves and returns.

Why it matters: Enables accurate installation by specialists and helps pre-order the exact quantities of lighting fixtures and materials.

2.4. Lighting and switch placement

What this is: A detailed map of luminaires, pendants, wall lights, track lighting, LED accents, and the switches and controls that operate them (with switch wiring diagrams).

Why it matters: To avoid practical annoyances - like switches hidden behind storage or single overhead lights in every room. It supports well-planned lighting scenes.

2.5. Socket and equipment plan

What this is: Layouts for all electrical outlets, data points, TV wiring, air conditioning, water heaters, towel radiators and leak detectors.

Why it matters: Prevents a tangle of adapters, lets you charge devices where you actually use them.

2.6. Flooring plans

What this is: Hatching and direction for tile, laminate or parquet, with transitions, joints, and skirting details.

Why it matters: Helps tilers and floor layers estimate materials and minimise waste.

2.7. If applicable: underfloor heating layout

What this is: Wiring and pipe routes for heating systems embedded in the floor, with control points.

Why it matters: Crucial for energy efficiency and even heat distribution.

2.8. Elevation drawings of finished walls

What this is: Elevations of each wall with finish details (paint, tiles, panels), placement of outlets, switches, and sanitary fittings as they appear on the wall.

Why it matters: A thorough guide for decorators and fit-out teams, removes guesswork about where the wall finishes end and paint begins.

2.9. Schedules and specifications

What this is: Consolidated lists of materials, sanitary fittings, lighting, hardware, and furniture with product references and finishes.

Why it matters: The primary financial control. This list enables you to compare prices, procure materials, and substitute items while maintaining compatibility with the overall design.

Only a complete package - combining both visual and working components - delivers a reliable outcome. The design project is a practical toolkit for renovation, not merely a design exercise.

How the design project unfolds: steps and timelines

To keep the renovation on track, many studios offer ongoing design supervision. This service extends the DP into the construction phase, helping anticipate issues, mitigate risk, and manage budget changes. For a deeper look at how author’s supervision works and why it can save both money and stress, see our companion guide on design supervision in renovations.

Getting started: what to do if you plan to commission a design project for your flat or house

Now that you understand what a DP looks like, the next step is choosing a partner and preparing for your first meeting. The following practical steps help you begin efficiently.

3 steps for an effective start

Step 1. Gather your inspiration

Before contacting studios, invest time in collecting ideas. Create a private board on a bookmarking site or a simple folder on your phone. Save not only interiors you love but also specific tiles, textures, or colours that catch your eye. Don’t constrain yourself to a single style. Your aim is to provide the designer with as much context as possible so the resulting plans reflect your true preferences.

Step 2. Create a self-questionnaire

Answer these core questions in writing:

• Budget: What is the total you’re prepared to invest in the renovation (finishes, furniture, appliances, contractor and designer fees)? An honest figure is essential for a feasible plan.
• Timeline: By when should the renovation be completed?
• Household needs and routines: Who will use the space? Is a dedicated home office needed, a play area for children, a wardrobe or a second bathroom necessary? Your daily habits shape the design far more than current trends.
• Must-haves and deal-breakers: Do you crave a working kitchen island, a specific storage solution, or a particular material? Capture these decisively.

Step 3. Choose the right professional and ask sharp questions

With your inspiration board and questionnaire in hand, you’re ready to engage. When evaluating design studios, look for a team that offers both creative concepting and detailed technical documentation, plus clear project management. Our guide to selecting a trustworthy partner provides a practical checklist and criteria for assessing the right fit.

If you’re ready to design your space, our studio offers integrated design and architectural services. We develop design projects from €1,500/m², combining aesthetic exploration with thorough technical planning to ensure your renovation can be realised smoothly. Reach out by phone, chat, or a site form, and we will prepare a tailored proposal for your apartment or house.

What you gain from a well-structured design project

A robust DP is more than a pretty concept - it is a roadmap, a control mechanism, and a practical agreement with builders and suppliers. It translates your lifestyle into concrete measures: where to store the vacuum cleaner, where to charge the smart toothbrush, where to hang laundry after washing. It fosters orderly living spaces now and into the future.

Closing thought: design project as your renovation compass

In the European context, spaces are often compact, and regulations or trades can differ from country to country. A well-prepared design project helps navigate these complexities by documenting decisions before work begins. It aligns expectations among homeowners, architects, and builders, making price negotiations more transparent and the build process more predictable. While construction always carries some unpredictability, the DP is the most reliable way to keep it at bay.

Final call to action

Ready to embark on a well-planned renovation? Our studio combines architectural insight with interior design expertise to deliver coherent, practical, and beautifully realised results. We work on projects from €1,500/m² and provide a personalised approach to design documentation, supervision, and on-site coordination. Contact us to discuss your space, your lifestyle, and your aspirations - and we will prepare a customised design project proposal for your apartment or home.