“How long will this take?” is one of the first questions every homeowner asks — and one of the hardest to answer honestly. Contractors often give optimistic timelines to win the job. Online articles quote best-case scenarios. Friends who have renovated either remember it being shorter than it was or have mentally blocked out the delays.
This guide gives you realistic timelines for common renovation projects, explains the factors that cause delays, and shows you how to build a schedule that has a fighting chance of surviving contact with reality.
Why renovation timelines are so hard to predict
Before diving into numbers, it is worth understanding why timelines are inherently uncertain. Unlike manufacturing, where you control every variable, renovation work happens in existing buildings that are full of surprises.
Hidden conditions. Opening up a wall might reveal damp, rot, asbestos, or wiring that does not meet current building regulations. These discoveries cannot be anticipated until demolition begins, and they add both time and cost.
Supply chain dependencies. Your kitchen cabinets, tiles, or windows may have lead times of 4-12 weeks from the date you order. If you have not ordered early enough, work stops while you wait. If the wrong item arrives, it needs to be returned and reordered.
Sequential trades. Much of renovation work must happen in a strict sequence: demolition, structural work, first-fix plumbing and electrical, plastering, second-fix plumbing and electrical, tiling, decoration. Each trade depends on the previous one finishing. If the plasterer is delayed by a week, every trade after them shifts by at least a week too.
Weather. For projects involving external work (roofing, windows, extensions, external walls), weather can halt progress entirely. Rain delays plastering, rendering, and painting. Freezing temperatures prevent concrete work.
Contractor availability. Good contractors are busy. If your project overruns its slot, your next trade may not be available immediately — they have moved to another job. This domino effect is one of the most common causes of extended timelines.
Realistic timelines by project type
These timelines cover planning through completion. Each includes a planning phase (design, permissions, procurement) and a construction phase (actual building work). Both are real parts of the project.
Bathroom renovation
| Phase | Duration |
|---|---|
| Planning (design, sourcing, ordering) | 4-8 weeks |
| Construction (strip-out to completion) | 2-4 weeks |
| Total | 6-12 weeks |
A standard bathroom renovation — replacing sanitaryware, retiling, and updating plumbing — typically takes 2-3 weeks of active construction. Budget 4 weeks if you are reconfiguring the layout (moving the toilet or shower position), adding underfloor heating, or dealing with an older property where the plumbing needs modernising.
The planning phase is longer than most people expect. Tiles, sanitaryware, and shower enclosures often have 3-6 week lead times, and making all your selections takes time. Do not underestimate this.
For more detail, read our bathroom renovation guide.
Kitchen renovation
| Phase | Duration |
|---|---|
| Planning (design, kitchen company, ordering) | 6-12 weeks |
| Construction (strip-out to completion) | 3-6 weeks |
| Total | 9-18 weeks |
Kitchens take longer to plan because of the number of decisions: layout, cabinets, worktops/countertops, appliances, splashback/backsplash, flooring, lighting, and plumbing. Kitchen cabinets alone often have a 6-10 week manufacturing lead time after the design is finalised.
Construction duration depends on scope. A like-for-like cabinet replacement with no layout changes can be done in 2-3 weeks. A full gut renovation with new plumbing, electrical, structural changes (removing a wall), and flooring takes 4-6 weeks.
For more detail, read our kitchen renovation guide.
Single room renovation (bedroom, living room)
| Phase | Duration |
|---|---|
| Planning | 2-4 weeks |
| Construction | 1-3 weeks |
| Total | 3-7 weeks |
A single room renovation without plumbing changes is simpler to schedule. The construction phase typically involves: electrician (first fix), plasterer, decorator/painter, flooring installer, and possibly a joiner for built-in furniture. Each trade may need only 1-3 days, but they need to work in sequence, and gaps between trades add up.
If you are adding an en-suite bathroom to a bedroom, add the bathroom timeline on top.
Whole-house renovation (cosmetic to mid-range)
| Phase | Duration |
|---|---|
| Planning | 4-8 weeks |
| Construction | 8-16 weeks |
| Total | 12-24 weeks (3-6 months) |
A whole-house renovation where you are updating every room — new flooring throughout, new kitchen, new bathroom(s), redecorated throughout — without major structural work typically takes 3-6 months total. The construction phase involves coordinating multiple trades across multiple rooms, and the logistics of this coordination add time.
Whole-house renovation (structural and comprehensive)
| Phase | Duration |
|---|---|
| Planning (including architect, structural engineer, approvals) | 8-16 weeks |
| Construction | 16-36 weeks |
| Total | 24-52 weeks (6-12 months) |
When structural work is involved — removing load-bearing walls, loft conversions, extensions, underpinning, new roof — the timeline extends significantly. Structural projects require architectural drawings, structural engineer calculations, and often planning permission or a building permit, all of which take time. The construction phase itself is longer because structural work must be completed and signed off before any finishing trades can begin.
Extension or conversion
| Phase | Duration |
|---|---|
| Planning (architect, planning permission, building regs, tender) | 12-24 weeks |
| Construction | 12-24 weeks |
| Total | 24-48 weeks (6-12 months) |
Extensions and conversions (loft, garage, basement) are essentially building projects attached to an existing house. They require professional design, planning permission (in most cases), building regulations approval, and a competent general contractor or builder. The planning phase is long because of the statutory approval processes.
Understanding lead times
Lead times — the gap between ordering something and receiving it — are one of the most common causes of project delays. First-time renovators are often surprised by how long they need to wait.
Typical lead times for common items
| Item | Typical lead time |
|---|---|
| Standard kitchen cabinets (off-the-shelf) | 2-4 weeks |
| Custom kitchen cabinets | 6-12 weeks |
| Worktops/countertops (quartz, granite) | 3-6 weeks after template |
| Windows (standard sizes) | 4-8 weeks |
| Windows (custom or heritage) | 8-16 weeks |
| Doors (internal, standard) | 1-3 weeks |
| Tiles (in-stock) | 1-2 weeks |
| Tiles (made-to-order or imported) | 4-8 weeks |
| Sanitaryware (in-stock) | 1-2 weeks |
| Sanitaryware (premium/designer) | 4-8 weeks |
| Structural steel beams | 2-4 weeks |
| Engineered wood flooring | 2-4 weeks |
| Fitted wardrobes/closets | 4-8 weeks |
| Appliances (in-stock) | 1-2 weeks |
| Appliances (out-of-stock or built-in) | 4-12 weeks |
How to manage lead times
Order early. The single most important thing you can do for your timeline is order long-lead items as soon as designs are finalised — ideally before construction starts. Your kitchen cabinets should be ordered weeks before the first wall comes down.
Confirm stock before committing. When you select a tile, a tap, or an appliance, confirm it is in stock. “Available to order” means it has a lead time. “In stock” means it can ship within days.
Have backup choices. For items that might go out of stock (particular tile patterns, popular sanitaryware models), identify an alternative you would also be happy with.
Coordinate with your contractor. Your contractor or project manager should tell you exactly when each item needs to arrive on site. Work backwards from those dates and add a buffer.
What causes delays and how to prevent them
Understanding the most common causes of renovation delays helps you avoid or at least mitigate them.
1. Indecision
The problem: You cannot decide on tiles, paint colours, or fixtures, and construction cannot proceed until you do. Every day of indecision is a day added to the timeline.
The solution: Make all material selections during the planning phase, before construction begins. Give yourself a deadline for each decision. It does not need to be perfect — it needs to be decided. A good contractor will tell you exactly what decisions they need and when.
2. Scope creep
Scope creep is the gradual expansion of what the project includes. It starts small — “while the electrician is here, could they add a few extra sockets?” — and compounds. Each addition seems minor, but together they add days or weeks.
The solution: Define your scope of work clearly in writing before construction begins. If you want to add something, acknowledge that it will affect the timeline and budget. Formalise it as a change order with your contractor, including the time and cost impact.
3. Unforeseen conditions
The problem: Demolition reveals hidden damp, asbestos, structural defects, or outdated wiring that must be addressed before work can continue.
The solution: You cannot prevent surprises, but you can prepare for them. Build a contingency into both your budget (10-15%) and your timeline (add 2-4 weeks buffer for a major renovation). Have a conversation with your contractor before work starts about what they think might be found.
4. Material delays
The problem: The tiles you ordered are delayed, the worktop cannot be templated until cabinets are fitted, or the shower screen is backordered.
The solution: Order long-lead items early (see lead times section above). Track orders and chase suppliers. Have backup selections ready.
5. Contractor scheduling gaps
The problem: The plasterer finishes on Friday, but the electrician cannot come back for second fix until the following Wednesday. These gaps add up across a whole project.
The solution: Discuss the full schedule with your general contractor before work starts. A well-managed project minimises gaps between trades. Ask your contractor for a week-by-week schedule showing which trades will be on site and when.
6. Permits and inspections
The problem: You need a building inspection before the walls can be closed up, and the inspector is not available for two weeks.
The solution: Submit inspection requests as early as possible. Your contractor should know the inspection schedule and plan around it. In some areas, you can request inspections online and track availability.
7. Weather
The problem: Rain, frost, or extreme heat halts external work.
The solution: Schedule external work during the most favourable season for your climate. In northern climates, exterior work is best scheduled for late spring through early autumn/fall. Build weather buffer into the schedule for any project with external components.
Building a realistic project schedule
A renovation schedule is not a single deadline — it is a sequence of milestones. Here is how to build one that works.
Step 1: Define the full scope
Write down every task that needs to happen, from demolition to final cleaning. If you are not sure of the full list, your contractor should provide one as part of their quotation.
Step 2: Identify the critical path
The critical path is the longest sequence of dependent tasks. If any task on the critical path is delayed, the whole project is delayed. For example:
- Strip-out and demolition
- Structural work (if any)
- First-fix plumbing and electrical
- Plastering
- Tiling (kitchen/bathroom)
- Second-fix plumbing and electrical
- Kitchen/bathroom fitting
- Flooring
- Decoration (painting)
- Final fix (sockets, switches, door handles, accessories)
- Cleaning and snagging
Tasks that are not on the critical path (like ordering furniture) can happen in parallel without affecting the completion date.
Step 3: Add lead time milestones
Map your material order dates against the critical path. For example, if kitchen cabinets have a 6-week lead time and need to arrive by week 8 of construction, they must be ordered by week 2 at the latest — preferably earlier.
Step 4: Add buffer
Add 1-2 weeks of buffer for small projects (single room) and 3-4 weeks for large projects (whole house). This is not pessimism — it is realism.
Step 5: Agree milestones with your contractor
A professional contractor should be willing to commit to milestone dates: when demolition will be complete, when first fix will be done, when plastering will be finished, and so on. Link payment stages to these milestones — it aligns incentives.
How to keep your renovation on schedule
Once the schedule exists, you need to actively manage it. Here are the habits that keep projects on time.
Weekly check-ins
Hold a brief weekly check-in with your contractor (in person or by phone). Review: what was completed this week, what is planned for next week, are there any blockers, are any decisions needed from you? This takes 15-20 minutes and prevents small issues from becoming major delays.
Make decisions fast
During construction, you will be asked questions daily. What height should the shower niche be? Which direction should the floor planks run? Where exactly do you want the light switch? Prompt answers keep work moving. Delayed answers stall it.
Visit regularly (but do not micromanage)
Visit the site regularly to see progress, but do not stand over tradespeople giving instructions. Communicate through your general contractor or project manager, not directly to subcontractors, to avoid confusion.
Track progress visually
Take photos at the end of each week. They help you see progress (which is motivating when you are living through disruption) and create a record if disputes arise later.
Keep a change order log
If you add or change anything, document it as a change order — what changed, what it costs, and how it affects the timeline. This prevents disagreements at the end of the project and keeps the scope under control.
Real-world timeline examples
Example 1: Bathroom renovation, straightforward
- Week 1-4: Design, select materials, order sanitaryware and tiles (planning)
- Week 5: Strip-out existing bathroom (1-2 days)
- Week 5-6: First-fix plumbing, relocate waste if needed (2-3 days)
- Week 6: Waterproofing/tanking (1 day, then 24h drying)
- Week 6-7: Tiling walls and floor (3-5 days)
- Week 7: Second-fix plumbing, install sanitaryware (2 days)
- Week 7-8: Electrical (lighting, extractor fan), decoration, accessories (2-3 days)
- Week 8: Snagging and handover
- Total: 8 weeks (4 planning + 4 construction)
Example 2: Kitchen renovation with structural changes
- Week 1-6: Design with kitchen company, order cabinets, structural engineer drawings (planning)
- Week 7: Strip-out existing kitchen (2-3 days)
- Week 7-8: Structural work — remove wall, install steel beam (3-5 days)
- Week 8-9: First-fix plumbing and electrical (3-5 days)
- Week 9-10: Plastering (2-3 days, then drying time)
- Week 10-11: Kitchen cabinets installed (3-5 days)
- Week 11: Worktop template taken (1 day, then 2-3 week wait for fabrication)
- Week 13-14: Worktop installed, splashback/backsplash tiled (3-4 days)
- Week 14: Second-fix plumbing and electrical, appliances connected (2-3 days)
- Week 14-15: Flooring, decoration, final fix (3-5 days)
- Week 15-16: Snagging and handover
- Total: 16 weeks (6 planning + 10 construction)
Note the 2-3 week gap while waiting for the worktop. This is a common dead period in kitchen renovations. A good contractor will schedule other work during this gap if possible.
Example 3: Whole-house renovation
- Month 1-2: Design, planning applications (if needed), detailed scope and quotes (planning)
- Month 3: Demolition and strip-out across whole house
- Month 3-4: Structural work (if any), roofing (if needed)
- Month 4-5: First-fix plumbing, electrical, and heating throughout
- Month 5: Plastering throughout (may take 2-3 weeks in a whole house)
- Month 6: Kitchen fitting, bathroom tiling
- Month 6-7: Second fix, flooring, worktops
- Month 7-8: Decoration throughout (painting is slow in a whole house)
- Month 8: Final fix, accessories, cleaning, snagging
- Total: 8 months (2 planning + 6 construction)
For a detailed approach to planning a project this large, see our home renovation planning guide.
Key takeaways
- Double the time you think it will take. If you think your project will take 4 weeks, plan for 8. You will rarely be disappointed.
- Planning is not wasted time. The weeks spent designing, selecting materials, and getting the scope of work right save weeks during construction.
- Lead times are real. Order materials early. The most common single cause of construction delays is waiting for materials that were ordered too late.
- Buffer is not pessimism. It is the only realistic way to account for the unknowable — hidden conditions, weather, supplier problems.
- Communication prevents delays. Weekly check-ins, prompt decisions, and a documented change order process keep the project moving.
Ready to plan your renovation timeline?
A realistic timeline starts with a clear, detailed description of your project. The more precisely you can describe what you want, the more accurately your contractor can schedule the work.
Aikitektly helps you describe your renovation project faster and better than you could on your own, so you can send that description to contractors with confidence. Join our early access programme and be the first to try it.