Interior design projects take longer than expected because each of the five delivery stages—Discovery, Concept, Design & Specification, Commission, and Reveal—serves a specific structural purpose that cannot be accelerated without compromising the permanence and coherence of the finished interior. Rushing any phase creates compounding problems that emerge only after installation, when correction becomes costly and disruptive.
What actually happens during each stage of an interior design project?
The studio’s five-stage process—Discovery, Concept, Design & Specification, Commission, and Reveal—mirrors the way buildings are constructed: each phase must complete before the next can meaningfully begin. Discovery is not a quick briefing meeting. It involves deep conversation about how you actually use your space, the materials and colours that sustain you over years, your lighting needs across seasons, and the maintenance reality of different finishes. For Beaulieu Dental Practice, Discovery established not just the functional flows of a clinical environment but the sensory experience patients encounter in the waiting room and treatment spaces—decisions that would be impossible to reverse mid-build.
Concept distils Discovery into a visual and spatial argument: the overall aesthetic direction, the relationship between rooms, the primary and secondary materials, the lighting strategy. This is where a commercial project like Fruittii Hair Salon translates the brand’s identity into spatial and material form. Concept, Design & Specification then extends Concept into exhaustive technical detail: every fixture specified, every paint colour and plaster finish named, every electrical and plumbing coordinate documented. Commission is the period during which materials are ordered, lead times confirmed, and contractors scheduled. Reveal is the handover and walkthrough—not a surprise, but the moment the interior is presented in its completed state. Each stage typically runs four to eight weeks, depending on project complexity and decision velocity.
Why does the Discovery phase take so long?
Discovery cannot be rushed without losing the information that makes the rest of the project coherent. A residential project like the London Embankment residence required Discovery conversations across multiple visits: understanding the light conditions at different times of day, the existing architectural character worth preserving, the daily rhythms of the household, and the specific textures and materials the client returned to in conversation. Discovery is detective work. It surfaces the contradiction between what a client says they want and what their actual behaviour and aesthetic choices reveal they need. A client might state a preference for minimalism but gravitate toward warm, tactile materials in conversation—information that matters for every choice downstream.
For commercial spaces, Discovery includes stakeholder interviews (staff, patients, customers), observation of workflow and peak-hours behaviour, and assessment of how the space performs acoustically, thermally, and visually. Tone at Canary Wharf required Discovery conversations with multiple teams to understand how the workplace interior would support concentration, collaboration, and informal gathering. Shortening Discovery to save time invariably means revisiting assumptions during Concept, Design & Specification or Commission, which is exponentially more disruptive and costly than extending Discovery upfront. The longest Discovery conversations yield the shortest revision cycles later.
What makes the Concept, Design & Specification phase take longer than clients anticipate?
Concept, Design & Specification is where Concept becomes a set of instructions for builders and suppliers. This stage requires the designer to make thousands of micro-decisions: the exact depth of a skirting board, the profile of a door frame, the grout colour in tiling, the position of power outlets, the specification of paint finish (matte, silk, or eggshell), the suppliers and lead times for bespoke furniture. Each decision is informed by the Concept but must also be tested against budget, availability, buildability, and the actual performance characteristics of materials in the specific conditions of the room. A reupholstered sofa keeps its original frame only if the Designer has understood the frame’s dimensions and condition during Discovery and specified the correct upholstery weight and suspension during Concept, Design & Specification.
The Witham Project demonstrated the time cost of specification rigour: the residential interior required detailed schedules for every surface finish across multiple rooms, coordination with structural work, and phased delivery to match the client’s occupancy timeline. Each specification decision had to be documented in written schedules and cross-checked against drawings. Clients often perceive this phase as slow because they see fewer visual changes than in Concept, but the work is foundational. A specification error—a misnamed paint colour, a supplier with a 16-week lead time instead of eight, a detail that conflicts with the building's existing systems—cascades into delays and cost during Commission and installation.
Why does the Commission phase introduce delays that are hard to predict?
Commission is when the project meets the real-world constraints of manufacturing and supply. Lead times for bespoke furniture, custom joinery, and certain finishes are not always predictable, and they vary by material, supplier, and season. A bespoke kitchen or fitted joinery might have a 12-week lead time; a specific fabric or stone finish might have an 8-week minimum order. If these lead times are not confirmed and managed during Concept, Design & Specification, the project stalls during Commission. For Keystones Estate Agent, a commercial refurbishment required coordination of multiple suppliers and a phased approach to handover, which meant Commission extended across the client’s trading schedule.
Contractors also have lead times for availability and scheduling. A plumber or electrician booked for a specific week might become unavailable, requiring rescheduling of dependent trades. Bad weather, material shortages, or discovering existing problems (asbestos, structural issues, hidden pipework) during the build can extend Commission without warning. The designer’s role during this phase is to monitor progress, approve materials as they arrive, and address unforeseen issues quickly so the timeline does not collapse. Commission is not passive waiting; it is active management of dozens of interdependent variables. Projects that appear to stall during Commission have usually hit one of these real-world constraints, and no amount of pressure on the designer accelerates a furniture factory or a building inspector.
What is the cost of rushing a project through its stages?
Rushing Discovery compresses the information-gathering phase and leaves the Concept, Design & Specification stages working from incomplete or inaccurate briefs. This creates revision cycles later, when changes are more disruptive and expensive. A client who skips Discovery site visits or decision conversations may discover during Reveal that the colour they approved in artificial lighting looks entirely different in their actual daylight, or that a specified material feels wrong in situ. Revising the interior after installation is not a simple matter of repainting or reordering; it often requires deinstallation, disposal, and replacement—delays measured in weeks rather than days.
Rushing Concept, Design & Specification forces designers to specify from incomplete information and creates gaps in the documentation that builders must resolve on site, often by guessing at intent. This leads to quality variation, rework, and disputes about what was actually specified. Rushing Commission by pressuring suppliers and contractors to accelerate lead times usually fails; they cannot manufacture faster than their capacity allows, and pressure often results in errors or quality compromises. A project like Great Brackstead—a residential interior with custom joinery and finishes—required its full Commission timeline not because of inefficiency but because the materials themselves required time to produce and cure properly. The permanence of the finished interior depends on respecting these material and manufacturing realities. A corner cut during Commission often reveals itself as a failure after the designer has left and the client is left managing the consequence.
How do you know if a project timeline is realistic?
A realistic timeline reflects the actual scope of work, the complexity of specification, the lead times of key materials and components, and the availability of trades. For residential interiors, typical timelines run four to five months from Discovery to Reveal for straightforward projects, and six to nine months for complex work involving structural changes, bespoke joinery, or multiple specialist finishes. Commercial projects like Beaulieu Dental Practice or Wandsworth College often run longer because they involve more stakeholders, higher compliance requirements, and often must work around existing occupation or use.
A red flag is a timeline that compresses Discovery to a single meeting, design to a few weeks, or specification to a checklist. Another red flag is a fixed timeline imposed before the scope is clear; scope and timeline are interdependent, not independent variables. Realistic projects build in contingency for the unforeseen—the material that arrives damaged, the existing wall that proves unsuitable for a specified finish, the supplier delay announced mid-project. Designers experienced with residential and commercial work understand these margins. If your project timeline feels compressed or unrealistic, that is usually a signal that the Discovery phase has been too brief, the specification is incomplete, or the Commission schedule does not account for real lead times and buildability. The time cost of doing it properly is the price of a permanent interior that works as intended and does not require revision six months after installation.