Step-by-Step Guide to the Interior Design Process: From Concept to Completion

When embarking on an interior design project, understanding the process from start to finish can help ensure a smooth and successful experience. The Royal Institute of British Architects (RIBA) Plan of Work is a framework that outlines the stages of a design project, offering a structured approach that many interior designers use to guide their work. Here’s how the RIBA Plan of Work stages translate into the interior design process, and how it can benefit your project, ensuring it runs smoothly:

Stage 0: Strategic Definition

Objective: Clarify the project’s objectives, feasibility, and overall strategy.

At this initial stage, the focus is on understanding the client's needs and the strategic objectives of the project. For an interior design project, this might involve initial consultations where the designer discusses the client’s vision, budget, and timeline. This stage also includes feasibility studies, site assessments, and the development of a project brief that outlines the key goals and parameters of the project.

Stage 1: Preparation and Brief

Objective: Develop the initial project brief and prepare the design direction.

This stage involves refining the project brief based on the strategic definition. The designer gathers more detailed information about the client's requirements, the site, and any existing constraints. This is also the stage where the client’s style preferences and functional needs are explored in greater detail. The output of this stage is a finalised project brief and a clear direction for the design work to follow.

Stage 2: Concept Design

Objective: Develop the initial design concept and explore various options.

In the concept design stage, the interior designer begins to translate the project brief into tangible ideas. This is where creativity comes into play, with the designer producing sketches, mood boards, and preliminary layouts that capture the essence of the proposed design. The concept design will typically include key elements such as spatial layouts, colour schemes, and material palettes. At the end of this stage, the client should have a clear understanding of the overall design direction and feel confident in moving forward.

Stage 3: Spatial Coordination (Developed Design)

Objective: Refine the design and resolve spatial layouts.

During the spatial coordination stage, the design concept is developed into a more detailed and refined plan. This involves finalising the spatial layout, including the placement of furniture, fixtures, and fittings. The designer will also coordinate with other consultants or contractors involved in the project, ensuring that all elements work together harmoniously. Detailed drawings, material specifications, and colour schemes are produced, providing a comprehensive view of how the space will look and function.

Stage 4: Technical Design

Objective: Develop technical drawings and specifications for construction.

The technical design stage is where the design is translated into detailed drawings and specifications that can be used for construction and implementation. This includes architectural details, electrical and plumbing layouts, custom joinery designs, and any other technical elements required to bring the design to life. The designer works closely with contractors and suppliers to ensure that all aspects of the design are feasible and within budget. At the end of this stage, the project is ready for the construction phase.

Stage 5: Manufacturing and Construction

Objective: Execute the design according to the technical specifications.

This stage marks the physical implementation of the design. The interior designer oversees the construction or renovation process, ensuring that the design is executed according to plan. This may involve regular site visits, coordination with contractors, and troubleshooting any issues that arise during construction. The designer ensures that the quality of work meets the high standards expected and that the project stays on schedule and within budget.

Stage 6: Handover and Close Out

Objective: Complete the project and hand over the finished space to the client.

Once the construction is complete, the project enters the handover stage. The designer conducts a final inspection to ensure that everything is finished to the highest standard and that the space meets the client’s expectations. Any final adjustments or snagging issues are addressed before handing over the keys. The designer may also provide the client with a maintenance guide and other relevant documentation.

Stage 7: In Use

Objective: Review the project’s success and make any necessary adjustments.

The final stage of the process involves reviewing the project after it has been in use for some time. The designer may check in with the client to assess how the space is functioning and whether any adjustments are needed. This stage is also an opportunity to gather feedback and learn from the project, ensuring continuous improvement in future work.


The Osher Group’s interior design process, guided by the RIBA Plan of Work stages, ensures a structured and thoughtful approach to transforming any space. From the initial concept to the final handover, each stage is critical in developing a design that is both functional and refined. By following this well-established process with our interior design team, you can ensure that every detail is carefully considered, reducing the chances of costly mistakes and ensuring a smoother journey from start to finish.

Choosing to work with Osher Group Interior’s professional interior designers brings expertise, creativity, and a deep understanding of space, materials, and craftsmanship. As designer, we not only streamline the process but also offer innovative solutions that you may not have considered. Our ability to create cohesive, timeless designs while managing all technical aspects allows for a higher level of quality and personalisation in your project. Whether you're creating a luxurious home or a standout hospitality space, contact us to discuss how we can help you achieve results that are both beautiful and enduring.

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