Planning a kitchen renovation means measuring your space, drawing it to scale, testing layouts, and placing appliances before you buy anything or book a fitter.
In this article
- Why does planning your layout before buying anything matter?
- What should you measure before you open the planner?
- How to set up your kitchen floor plan
- Which kitchen layout is right for your space?
- How do you place appliances and use the work triangle?
- How much clearance does a kitchen island need?
- Planning a kitchen extension or knocking through a wall
- Exporting and sharing your kitchen floor plan
- Frequently Asked Questions
- Start planning your kitchen renovation today
Most kitchen renovations run over budget. Not because materials cost more than expected — but because the planning stage was rushed, done on a rough sketch, or skipped entirely. A cabinet arrives and blocks the dishwasher door. An island looks lovely on a mood board but leaves a 600mm walkway two people can't pass through. The fridge turns up and there's nowhere sensible to put it.
These aren't bad-luck problems. They're planning problems — and they're avoidable.
Hiring a kitchen designer to catch them costs hundreds, sometimes thousands of pounds. Reddit renovators in r/kitchenremodel report design plans ranging from $6,000 to $10,000+, which is why many homeowners skip that step. A free online planner changes the maths. Map your whole kitchen, test three layouts, check island clearances, and export a precise floor plan for your fitter — all before spending a penny on materials or labour.
This guide walks you through every stage using Free Room Planner: a browser-based tool with no sign-up, no download, and no payment. Open it in any browser, on any device, and start in minutes.
Why does planning your layout before buying anything matter?
Planning your layout first prevents the costly ordering and fit errors that derail most renovations, because a floor plan forces you to assign real dimensions to every decision instead of guessing.
Skipping the planning stage feels efficient. It isn't. The decisions you make before a single unit is ordered determine whether your kitchen works for the next ten to twenty years.
The most common kitchen renovation mistakes
These show up again and again in renovation forums and contractor conversations:
- Appliances that don't fit the gap. A standard fridge is 600mm wide, but cabinetry often gets ordered without accounting for appliance depth plus door swing.
- Cabinets that block doors. A base cabinet placed without measuring the door arc stops the door opening fully — sometimes discovered only after installation.
- Islands that choke traffic flow. An island that looks proportionate in a photo can squeeze a real walkway to an impassable gap.
- Windows above the wrong wall. Planning a wall unit, then finding the window sits exactly where it needs to go.
- Utility points in awkward positions. Gas, waste, and electrical points that haven't been mapped force expensive pipe runs or rewiring mid-build.
Every one of these is easier to spot on a digital floor plan than in a physical room.
How a floor plan prevents costly errors
Draw your kitchen to scale and you stop guessing. You see immediately that the island you want is 200mm too wide for comfortable flow. You check the fridge door won't swing into the hob. You confirm the extractor sits above the right wall before your builder starts chasing cables.
A plan also gives your fitter a shared reference point. Instead of describing your layout in words — which is surprisingly ambiguous — you hand over a precise image with real measurements. Quotes get sharper. Disputes get rarer.
What should you measure before you open the planner?
Measure every wall, door, window, and utility point in millimetres before you open any tool. Twenty minutes of thorough measuring makes everything that follows faster and more accurate.
Grab a tape measure, a notepad, and — for longer walls — a second pair of hands.
The essential measurement checklist
Work around the room methodically. Record everything in millimetres.
- Walls — total length of each wall at floor level; note alcoves, recesses, or chimney breasts.
- Doors — opening width, swing direction and distance, and distance to the nearest corner.
- Windows — width, height, sill-to-floor distance, and distance to the nearest corner.
- Ceiling and floor — ceiling height in two spots (older homes rarely sit level); note beams or slopes.
- Utility points — gas supply, plumbing inlet and waste, sockets, consumer unit, radiators.
Planning an extension? Also measure the external wall, the garden or side-return width, and where the soil stack runs — your builder needs this before structural work begins.
Handling awkward or irregular kitchens
Not every kitchen is a clean rectangle. A few practical fixes:
- L-shaped rooms: measure each section separately, recording external and internal corner dimensions.
- Bay windows: measure the straight chord across the opening and note the projection depth.
- Existing fitted kitchens: measure the room behind the units, not the cabinet faces — units hide uneven walls and pipes.
Write every number down before you open the planner. Relying on memory between the kitchen and your laptop is how errors creep in.
How to set up your kitchen floor plan
With measurements in hand, you're ready to draw. Learning how to draw floor plans accurately online is simpler than most people expect — no CAD, no manual, no learning curve.
Opening the kitchen planner
Select the kitchen planner. There's no account to create, no email to hand over, nothing to install. The tool opens straight away and the grid loads ready to draw.
The snap-to-grid system locks every wall to 10cm increments automatically. That removes the biggest source of freehand inaccuracy — the drift that turns a 3,200mm wall into a 3,175mm one. Adjust manually for non-standard dimensions, but the grid keeps your plan honest.
Drawing walls, doors, and windows
Start with the longest wall. Click to set your start point, drag to length, click again to finish. Work around the perimeter, entering each measurement as you go.
With the outline complete:
- Add each door at the correct position and set the swing direction — the arc is what prevents cabinet conflicts.
- Add each window at the right height and width.
- Mark structural features: chimney breast, alcove, or pillar.
Checking scale with live measurements
Free Room Planner shows live measurements as you draw, so you can confirm each wall matches your figure. Check every wall before layout — thirty seconds now saves reworking twenty placed items later. Click any wall, adjust the number, and the plan reflows in proportion.
Which kitchen layout is right for your space?
The right layout depends on your room's shape, your cooking habits, and whether you want open-plan flow. There are five main types — and the best way to choose is to test them in the planner, not read about them in theory.
Galley and single-wall kitchens
A galley runs units along two parallel walls with a central walkway — the most efficient layout for small rectangular rooms. A single-wall layout puts everything on one wall, common in studio flats. For a galley to work with two cooks, keep the walkway at least 1,200mm.
L-shape and U-shape layouts
An L-shape uses two adjacent walls and suits medium to large kitchens, creating a natural work triangle without much floor space. A U-shape adds a third run for maximum storage — but needs an internal width of at least 1,200mm between facing units (1,500mm is more comfortable). Draw your shape and measure the gap before committing.
Island and open-plan layouts
An island needs a room at least 4,500mm in one direction to allow proper clearance all round. Open-plan kitchens flowing into living or dining space need the kitchen zone to function independently while fitting the larger room. Drop an island in, resize it, and watch the clearance update live. For extensions, map the extended footprint digitally before your first builder conversation.
How do you place appliances and use the work triangle?
Position your sink, hob, and fridge in a rough triangle so you move easily between them without paths crossing a busy walkway. This work triangle has guided kitchen design for decades.
A practical work triangle has each leg between 1,200mm and 2,700mm, a total perimeter under 8,000mm, and no major traffic route cutting across it. These are guidelines, not laws — but useful targets when you decide where things go.
Positioning fridge, hob, and sink
Drop your three main appliances in and step back to see the triangle:
- Fridge: near the kitchen entry, so food is reachable without crossing the cooking zone. Check the door swing — most swing wide.
- Hob: against a wall where an extractor can mount directly above. Keep windows and door swings clear.
- Sink: usually under or near a window, close to the plumbing inlet and waste you noted while measuring.
Once these three sit right, the cabinetry tends to follow naturally.
Adding cabinets and units
Place base cabinets along the runs, leaving gaps at appliance positions. Add wall units above, clearing windows and sitting 450–500mm above the worktop. Put tall units — larder, integrated housings, pantries — at the ends of runs, not the middle where they'd break the worktop flow. The drag-and-resize tools let you size each cabinet to fill the run precisely, exactly the check that prevents ordering errors.
How much clearance does a kitchen island need?
Leave at least 900mm (36 inches) of clear walkway on every side of a kitchen island. That's the practical minimum for one person to walk past, open an oven, or crouch to a low cabinet without feeling cramped.
For two cooks, 1,050mm to 1,200mm per side is more comfortable. If the island has a seating overhang, add chair depth (500–600mm) to the clearance on that side.
Sizing your island
A common starting point is 900mm wide by 1,200mm long. But the right size is the largest that still leaves 900mm+ on all sides. Work backward:
- Measure the room width (or distance between facing units).
- Subtract 900mm clearance on each side — 1,800mm total.
- The result is your maximum island width.
For facing units 4,200mm apart, the maximum island width is 2,400mm — a ceiling, not a target. Want seating on one end? Add 600mm per seat and re-check clearance.
Drop an island in, resize to your target, and measure the clearance on each side with the live tool. Move it toward the cooking zone, then the dining area — the visual instantly shows whether it works.
Planning a kitchen extension or knocking through a wall
Extending your kitchen — or opening it into an adjacent room — is one of the most impactful changes you can make. It's also one of the priciest, and your planning decisions directly affect the cost. You can map the extended footprint digitally before spending on surveys or structural engineers.
Mapping the extended footprint
Draw your current kitchen, then extend one or more walls to reflect the proposed change.
For a rear extension, add the extension depth to the rear wall, adjust for boundaries, and draw in the bi-fold or sliding door opening. For a knocked-through wall, remove the wall between kitchen and dining room, draw the combined footprint, and mark the structural opening (your builder will spec an RSJ or steel beam — note it for the conversation).
Test your layout within the new footprint. You may find the extra space enables an island that wasn't possible before.
What to show your builder
Bring your exported floor plan to the first meeting and walk through the new footprint, walls to be removed, unit and appliance positions, planned windows and doors, and any service points to move. Builders price more accurately when they can see a layout — verbal descriptions attract a contingency buffer that a clear plan removes. A good floor plan makes briefing a builder far more productive.
Exporting and sharing your kitchen floor plan
Once your layout is finalised, you have something valuable: a precise, to-scale image you can share with anyone on the project.
Exporting as an image
Free Room Planner exports a clean PNG — no watermarks, no compressed previews, just a readable floor plan with dimensions. Hit export, save the file, and attach it to an email, drop it into a quote request, or print it for a meeting. It works for contractor quotes, designer consultations, planning submissions, or your own renovation folder — no download of software involved.
Using your plan with contractors and fitters
A floor plan transforms the contractor conversation. Instead of describing your vision, you show it.
- Send the plan with your enquiry so the fitter can quote before visiting.
- Use it on-site to clear up any ambiguity about unit positions or clearances.
- Update and re-export if you change anything mid-project, so everyone works from the same version.
Fitters consistently find that clients who arrive with a plan get faster, sharper quotes and fewer install surprises. A plan doesn't replace a site visit — it makes the visit far more productive.
Sharing with a kitchen designer
Working with a designer at a showroom or independently? Your plan gives them a head start. They see your room's constraints immediately and focus the consultation on refining your layout rather than starting from scratch — worth bookmarking if your requirements shift after a consultation.
Frequently Asked Questions
Common questions homeowners ask before planning a kitchen renovation.
Do I need a designer to plan a kitchen renovation?
No. Many homeowners plan straightforward kitchens entirely without a designer. A free online planner handles the core tasks: drawing the room to scale, testing layouts, placing appliances, and checking clearances. A designer adds value in material selection, lighting, and complex spatial problems — not the layout fundamentals this guide covers.
How long does kitchen renovation planning take?
Measuring takes around twenty to thirty minutes for most kitchens. Drawing the plan and testing two or three layouts takes one to two hours — less if your measurements are accurate and the room is a simple shape. Allow more for larger kitchens, extensions, or multi-zone open-plan spaces. The build itself typically runs three to six months from planning to finish.
Can I plan a kitchen extension online for free?
Yes. Free Room Planner lets you draw any footprint — extended rooms, knocked-through spaces, side-return additions — at no cost. Draw your current room, extend the walls, and test layouts within the new shape. You can use the exported plan to support early builder conversations or, in some cases, a planning application.
Is Free Room Planner really free with no sign-up?
Yes. There's no account to create, no email required, no trial period, and no payment at any stage. Open it in any browser and start immediately. The export function that produces the PNG floor plan is free too. The only thing you need is a kitchen to plan.
How accurate is a floor plan made with a free online planner?
As accurate as your input measurements. The snap-to-grid system locks walls to 10cm increments and shows live measurements as you draw, eliminating most of the drift that makes freehand sketches unreliable. Measure carefully and enter each dimension precisely, and the result is accurate enough for contractor quotes and designer consultations.
What's the difference between a kitchen floor plan and a kitchen design?
A floor plan shows the layout from above — wall positions, openings, appliance locations, and cabinet runs, all to scale. A kitchen design adds material choices, finishes, lighting, and elevation drawings. For renovation planning, the floor plan is the essential foundation — you can't make good design decisions without knowing the layout first.
Start planning your kitchen renovation today
The single most useful thing you can do before buying a cabinet or booking a contractor is draw your kitchen to scale — because it makes every later decision faster, cheaper, and far less likely to end in expensive rework.
You've now covered how to measure thoroughly, draw your outline, choose and test a layout, apply the work triangle, check island clearances against the 900mm minimum, map an extension, and share your plan with the professionals.
Open the planner and put it into practice — no sign-up, no download, no cost. If you're renovating other rooms too, the free room planner works for any space, so your kitchen plan doesn't sit in isolation from the rest of the project.
Related guides
- DIY Renovation Planning Tools: How to Plan Any Room Free
- Home Renovation Planning: The Visual Method
- How to Plan a DIY Renovation Free (Step-by-Step)
- DIY Renovation Planning Tools: Step-by-Step Guide
- Home Renovation Planning: Draw It First
- Best Room Planner App for Renovations 2026
- Best Free Floor Plan Software for Home Renovation 2025
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- Kitchen Island Dimensions & Layout Planning Guide
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