One of the first questions any client asks, right after cost, is how long their project is going to take. It’s an entirely reasonable thing to want to know, and it’s one that deserves a straight answer rather than the vague ‘it depends’ that too many professionals fall back on.
It does depend, of course. But there are clear patterns that allow us to give realistic timelines for most types of project. If you’re based in Bromley, Kent, South London, or Surrey and you’re planning an interior design project, here’s what you can genuinely expect.
The Short Answer
For a full service residential interior design project (concept through to completed installation), here are realistic timelines based on typical project types:
- Single room redesign: 8–16 weeks
- Whole house interior design (no major structural work): 6–12 months
- Full renovation with structural changes: 12–24 months
- Commercial fit out (office, hospitality, retail): 4–12 months depending on scale
These timelines cover everything from the initial consultation to the moment you walk into your finished space. They are realistic, not optimistic. Clients who plan around optimistic timelines invariably find themselves frustrated when reality intervenes.
What Affects the Timeline?
The Complexity of the Brief
A single room redesign with no structural changes and furniture sourced from established suppliers is a very different undertaking from a six bedroom whole house renovation with bespoke joinery throughout, a new kitchen, a loft extension, and a landscape redesign. The complexity of the brief is the single biggest variable in any project timeline.
Design Development Time
Good design takes time. The concept development phase (research, spatial planning, mood board development, material selection, 3D visualisation, client presentations, revisions) typically takes four to eight weeks for a single room and significantly longer for a whole property. Rushing this phase almost always creates problems downstream.
At BD Interiors, we don’t shortcut the design process. A considered design that has been properly developed and signed off by the client before any orders are placed or works begin is one of the most important factors in a smooth, successful project.
Lead Times on Materials and Furniture
This is often the factor that surprises clients most. In the luxury sector, lead times on furniture, fabric, bespoke joinery, and specialist materials can be substantial:
- Bespoke upholstered furniture: 12–20 weeks from order
- Bespoke joinery (fitted wardrobes, cabinetry, kitchens): 10–16 weeks from sign off
- Specialist wallcoverings or fabrics: 6–14 weeks
- Custom rugs: 16–24 weeks
- Antique or vintage pieces: Variable: sometimes immediate, sometimes requiring a search of months
These lead times mean that procurement needs to begin as early in the process as possible, sometimes before construction is complete. Managing this requires careful coordination between the design timeline and the build programme.
Building Works and Contractor Availability
If your project involves structural changes, a kitchen or bathroom installation, electrical rewiring, new plaster, or painting and decorating, the availability of trusted contractors adds another timeline variable. Good contractors (the kind you want working in your home) are typically booked several months in advance. In Bromley, South London, and across Kent, we work with a trusted network of contractors who are familiar with our standards and processes, which helps significantly. But even the most carefully planned building project encounters unforeseen issues once work begins: hidden structural details, services in unexpected locations, specification changes. A realistic programme builds contingency for these.
Decision Speed
The single factor most within a client’s control is how quickly they make decisions. Projects where clients are engaged, responsive, and able to sign off on designs, products, and samples promptly move considerably faster than those where decisions take weeks. We support clients through every decision, providing the context and visual references they need to feel confident, but the speed of those decisions sits with the client, and it matters.
A Typical Project Timeline in Detail
To make this concrete, here’s how the timeline typically breaks down for a full whole house design project with moderate structural works:
Weeks 1–2: Initial consultation and brief development
Site visit, client brief, initial discussion of budget and scope.
Weeks 3–8: Concept development
Spatial planning, mood boards, material direction, preliminary furniture selections. Client presentation and feedback.
Weeks 9–14: Detailed design and specification
3D visualisations, technical drawings, full specification document, contractor briefing packages.
Weeks 10–14: Contractor tendering and appointment
Obtaining quotes, reviewing contractors, appointing the build team. (This overlaps with detailed design.)
Weeks 14–16: Procurement begins
Placing orders for items with long lead times: joinery, upholstery, specialist materials. Orders are timed to arrive as construction completes.
Weeks 14–40+: Construction
Depending on scope. During this phase we make regular site visits, resolve any design queries that arise, and manage the flow of contractor queries and approvals.
Weeks 35–44: Furniture and furnishings installation
As construction completes room by room, furniture, lighting, window treatments, and accessories are installed.
Week 44+: Final styling and handover
Every detail placed, every surface dressed. The final reveal.
Can Projects Be Done Faster?
Yes, and sometimes there are good reasons to accelerate. A client with a fixed move in date, a commercial client with a lease commencement deadline, or a project with a relatively small scope can all be delivered on a tighter timeline. But acceleration almost always has a cost: higher contractor fees for expedited work, premium charges for rushed production from suppliers, and an increased risk of decisions being made without sufficient consideration.
Our honest advice: wherever possible, build in more time than you think you need. The projects that clients remember most fondly are rarely the fastest ones. They’re the ones where every decision was made with care and the result reflects that.
Planning Your Project in Bromley or Kent
If you’re beginning to think about a design project and wondering whether your timeline is realistic, we’re always happy to have a candid conversation. At BD Interiors, we would rather give you an honest programme at the outset, even if it means pushing your start date back, than set expectations we cannot meet.
Book a call to arrange an initial consultation. We’ll walk through your brief, give you a realistic sense of the timeline, and help you plan a project that’s as enjoyable to go through as the result is to live in.
