Kitchen and Bathroom Renovation Budget Guide: Build a Worksheet Before You Collect Quotes

Why a worksheet comes before quotes

Most renovation stress does not start on demolition day. It starts weeks earlier, when three quotes arrive that all describe different work, use different materials, and total very different amounts, and there is no fair way to compare them.

A budget worksheet solves that problem before it happens. You write down, in one place, exactly what is in scope and what is not, how much material you calculated, what labour lines you expect, and how much contingency you are holding for surprises. Then every contractor prices the same job, in the same categories, and you can compare their replies side by side.

This guide teaches that method for kitchens and bathrooms, the two rooms where plumbing, electrical, tile, cabinetry, and finishes collide in a small space. The method works for a full gut renovation and for a light refresh. The difference is only in how many lines you fill in.

All dollar figures in the worked example in this guide are example only placeholders. They are there to show the arithmetic and the layout. Replace every one of them with your own quotes, your own supplier prices, and your own measurements before you make any decision. Mississippi Maple does not set prices for contractors or stores, and prices vary widely by region, product, and timing.

The method in five parts

A complete worksheet has five parts, in this order:

1. A scope list, written in plain language
2. Materials takeoffs, calculated from measurements, not guessed
3. Labour placeholder lines, kept separate from materials
4. A contingency line, explained and applied consistently
5. A quote tracking table, where each quote is entered in the same categories

If you skip the first part, the rest wobbles. If you merge labour and materials into one vague total, you cannot tell where a quote is high or low. If you skip contingency, the first hidden problem becomes a crisis instead of a planned draw on a planned reserve.

Work through the parts in order. Do not start with a total in mind and force the lines to fit it. Build up from scope and measurements, then look at the total with clear eyes.

Part 1: Write the scope list

What scope means

Scope is the boundary of the job. It says what will be removed, what will stay, what will be installed, and what will be finished. A good scope list is boring in the best way. It is specific, room by room and task by task.

For a kitchen, scope lines might include removing existing cabinets or keeping them, replacing a countertop, adding a backsplash, moving or not moving plumbing, adding or not adding outlets, painting walls and ceiling, and replacing flooring or keeping it. For a bathroom, scope lines might include keeping the tub or replacing it, retiling a shower or only a floor, replacing a vanity, moving or not moving a toilet, adding ventilation, and painting.

Write each item as its own line. Avoid combined lines such as "update bathroom" because no contractor can price that the same way as another.

Include the exclusions

Just as important, write what is not in scope. Examples include structural changes, moving load bearing walls, work in other rooms, appliances unless you list them, and permits or inspections unless you assign them to a line. Exclusions are not negative. They protect both you and the contractor from assuming the other person had it covered.

If you are undecided on an item, mark it as an optional line and price it separately. That way a nice to have upgrade does not hide inside the base total, and you can add or drop it without rebuilding the whole budget.

Note existing conditions

Add a short notes section on what you know about the space now. Note approximate age of plumbing and wiring if you know it, any known leaks or water damage, access for bringing in large items, and whether the home will be occupied during the work. Contractors price risk and difficulty as well as materials. Clear notes lead to clearer quotes.

Part 2: Do materials takeoffs with calculators

What a takeoff is

A takeoff is a quantity calculated from measurements. Instead of guessing that a bathroom needs "some tile," you measure the floor and walls to be tiled, calculate area, add waste, and arrive at a quantity in square metres, with square feet in parentheses if your supplier sells that way.

Takeoffs turn arguments about price into checks on quantity. If two quotes use very different tile quantities for the same room, one measurement is wrong, and you can find it before work starts.

Measure in metric first. Record length and width in metres, multiply for area in square metres, and keep the imperial conversion beside it for suppliers who list coverage in square feet. One square metre is about 10.764 square feet.

Tile and backsplash

For floors, measure length multiplied by width. For walls, measure width multiplied by height for each wall or shower section, then add them. Subtract large openings only if your supplier advises it for that product, and note what you subtracted.

Add a waste allowance for cuts and breakage. Straight layouts in large rooms waste less. Small rooms, diagonal layouts, and patterned tile waste more because more pieces are cut at edges. State the percentage you used on the worksheet.

Use a tile calculator for floors and walls and a backsplash calculator for the kitchen area between counter and upper cabinets. That backsplash area is easy to underestimate because it wraps around outlets, windows, and corners. Measure its height carefully, usually from counter surface to the underside of the upper cabinets, and its total length along the wall.

Paint

Paint quantity starts with wall area, minus doors and large windows if you choose to subtract them, multiplied by the number of coats you plan. Ceilings are a separate line if they are being painted, often in a different finish.

Record the area, the coats, and the coverage per litre or per can stated by the manufacturer for your chosen product. Different paints cover differently, and a dark colour over a light wall, or the reverse, may need an extra coat or a primer line. List primer separately if you need it.

A paint calculator does the area and coats arithmetic quickly, but check that you entered wall height correctly. In many Canadian homes ceiling height is around 2.4 m (about 8 feet), but older and newer homes vary. Measure yours.

Trim, flooring, and other linear items

Trim, baseboard, casing, and some flooring transitions are sold by length, not area. Measure each wall, subtract door openings where trim does not run, and total the length in metres, with feet in parentheses if needed. Add a waste allowance for mitre cuts and mistakes.

A trim calculator helps you convert total length into the number of pieces to buy based on the length each piece is sold in. Buying by the piece without that step is how a project ends up one short piece away from finished.

For sheet or plank flooring, return to area, add waste for cuts and pattern, and confirm how the product is sold, by the box, and how much area a box covers.

Fixtures, cabinets, and one off items

Some items are counted, not measured. Vanities, toilets, faucets, light fixtures, cabinet hardware, and mirrors go on the worksheet as a count, a product name or allowance line, and a price placeholder you replace with a real quote or store price. Keep these lines separate from area based materials, so a change in faucet choice does not look like a change in tile cost.

If you have not chosen a fixture yet, write it as an allowance line and label it clearly as an allowance, example only, until you choose. That honesty keeps the total realistic.

Part 3: Add labour placeholder lines

Why labour is separate

Labour is the work to remove, prepare, install, and finish. Keeping it separate from materials lets you see whether a high quote is high because of materials you chose, or because of the labour approach, schedule, or included tasks.

You do not need to predict a contractor hourly rate to build the worksheet. Create placeholder lines by trade or by task, and leave the amount to be filled in by each quote. Typical lines include demolition and disposal, plumbing, electrical, carpentry and cabinet installation, tile setting, painting, and general finishing.

Your placeholder is a structure, not a price claim. When quotes arrive, enter each contractor amount in the matching line. If a contractor bundles several tasks into one amount, note that it is bundled and do not force it into lines it does not match. Bundled versus detailed is itself useful information when you compare.

Include preparation and finishing

Homeowners often list the visible install work and forget preparation and finishing, which are real work. Add lines for surface preparation, waterproofing in wet areas where applicable, patching and levelling, caulking and sealing, cleanup, and disposal fees if they apply. Ask each contractor to confirm which of these are included in their lines and which are not.

Waterproofing in showers and around tubs deserves its own attention. The tile is the surface you see. What is behind it decides how long the job lasts. Make sure your scope states the expected approach so quotes are based on the same expectation.

Permits, inspections, and professional fees

Some kitchen and bathroom work triggers permits or inspections, especially plumbing, electrical, and structural changes, and requirements vary by municipality in Canada. Add a line for permits and inspections and a line for any design or professional help you plan to use. Leave the amount as a placeholder to confirm locally. Do not assume a project needs no permit because it looks small from the outside.

Part 4: Add contingency, and understand what it is for

Contingency as a planning practice

Contingency is a reserve you plan, in advance, for costs you cannot see yet. In renovation planning, a common practice is to hold contingency in the range of 10 percent to 20 percent of the subtotal, with the exact percentage depending on the age of the home, how much hidden work is involved, and how many changes you expect to make along the way.

That range is a planning practice, not a promise that surprises will cost that much, and not advice tailored to your project. A light cosmetic refresh of a newer bathroom, with no plumbing moves, carries less hidden risk than opening walls in an older home. Choose a percentage, write down why you chose it, and apply it the same way to every quote comparison.

Contingency is not a shopping fund for upgrades. If you use it to add a more expensive finish, it is no longer there for a rotted subfloor or an outdated wire found behind a wall. Keep upgrade decisions as separate optional lines, and keep contingency for the unknown.

How to calculate it

Add up your materials and labour subtotal first. Multiply that subtotal by your contingency percentage. Add the result as its own line. The worksheet total is subtotal plus contingency.

Showing contingency as a visible line matters. A total that silently includes a reserve looks inflated. A total with no reserve looks precise but fragile. A visible line is honest about uncertainty.

If the project finishes with contingency unspent, that is a good outcome, not a failure of budgeting. You planned for risk that did not happen.

Part 5: Track quotes side by side

Build the comparison table

Create columns for each contractor or supplier, and rows for each scope, materials, and labour line from your worksheet, plus contingency and total. Enter each quote exactly as given, in the matching row. Add a notes row for schedule, warranty terms as stated by the contractor, what is excluded, and payment terms as stated in their document.

Do not compare only the bottom totals. Two totals can be close for opposite reasons, one high on tile and low on plumbing, the other the reverse. The line by line view shows you what to ask about.

If a quote is missing a line that others include, do not assume its price is zero. Mark it as not included or not stated, and ask. The cheapest total is often the one with the most missing lines.

Use discount and percent tools carefully

If a supplier offers a percentage discount, apply it to the specific line it applies to, not to the whole project unless the offer says so. A discount calculator helps you check the discounted price, and a percent calculator helps you verify contingency and tax related arithmetic when those lines are shown on a quote. Keep the pre discount price visible, then show the discount as its own line, so you can undo it if the offer expires.

Watch for expiry dates, product substitutions, and whether a discount applies only to materials you buy yourself versus materials supplied by a contractor. Write those conditions in the notes.

Worked example

This is a small bathroom refresh. Every dollar figure below is example only, a placeholder you would replace with your own quotes and store prices. The value of the example is the layout and the step by step arithmetic.

Scope for the example: keep the tub, toilet location, and vanity location. Replace floor tile and a small shower wall tile area, repaint walls, replace baseboard trim, and refresh caulking and sealant. No plumbing moves, no structural work.

Step 1: Tile takeoff

Floor: 2.4 m by 1.8 m = 4.32 square metres Shower wall area to retile: 3.6 square metres Total tile area before waste: 4.32 plus 3.6 = 7.92 square metres

Waste allowance used for this example: 10 percent 7.92 multiplied by 0.10 = 0.792 square metres Tile to order: 7.92 plus 0.792 = 8.712 square metres, round up based on box coverage to the next full box as your supplier advises.

Example only tile material placeholder: $850.00 example only This line includes tile only in this example layout. Grout, mortar, and backer materials would be their own lines in a full worksheet. For simplicity in this short example, the next line combines them.

Example only tile setting supplies placeholder: $210.00 example only

Step 2: Paint takeoff

Walls to paint: total wall area calculated as 18 square metres after subtracting the tiled areas and a door, for this example. Coats: 2 Paint material placeholder: $120.00 example only Primer is not included in this example because the example assumes painting over a similar colour in good condition. Your project may need a primer line.

Step 3: Trim takeoff

Baseboard length: walls total 8.4 m, minus a 0.9 m door opening = 7.5 m of trim needed, before waste. Add waste for cuts: round up to the next sold piece length as a trim calculator shows. Example only trim material placeholder: $180.00 example only

Step 4: Other materials and fixtures refresh

Example only caulk, sealant, and small supplies placeholder: $65.00 example only Example only new faucet and mirror allowance placeholder: $340.00 example only, labelled as an allowance until products are chosen.

Materials subtotal, step by step: $850.00 plus $210.00 = $1,060.00 $1,060.00 plus $120.00 = $1,180.00 $1,180.00 plus $180.00 = $1,360.00 $1,360.00 plus $65.00 = $1,425.00 $1,425.00 plus $340.00 = $1,765.00

Materials subtotal: $1,765.00 example only

Step 5: Labour placeholder lines filled by example quotes

Example only demolition and disposal placeholder: $400.00 example only Example only tile setting labour placeholder: $1,450.00 example only Example only painting labour placeholder: $550.00 example only Example only plumbing fixture swap labour placeholder: $350.00 example only Example only trim and finishing labour placeholder: $300.00 example only

Labour subtotal, step by step: $400.00 plus $1,450.00 = $1,850.00 $1,850.00 plus $550.00 = $2,400.00 $2,400.00 plus $350.00 = $2,750.00 $2,750.00 plus $300.00 = $3,050.00

Labour subtotal: $3,050.00 example only

Step 6: Project subtotal before contingency

$1,765.00 materials plus $3,050.00 labour = $4,815.00

Project subtotal before contingency: $4,815.00 example only

Step 7: Contingency line

Contingency percentage chosen for this example: 15 percent, in the middle of the 10 percent to 20 percent planning range, because the example home has some hidden tile substrate that cannot be fully seen until removal.

$4,815.00 multiplied by 0.15 = $722.25

Contingency line: $722.25 example only

Step 8: Worksheet total

$4,815.00 plus $722.25 = $5,537.25

Worksheet total: $5,537.25 example only

This total does not include taxes that may appear on quotes, permits, or optional upgrades, because those are tracked as separate lines in a full worksheet. When you receive a real quote, enter its tax line and permit line exactly as shown, in their own rows, so comparisons stay clean.

If you later choose an optional upgrade, for example a different faucet at a higher placeholder price, change only that allowance line, recalculate the materials subtotal, then recalculate contingency on the new subtotal if that is the method you chose. Do not edit the total directly.

Tips for kitchens, where costs concentrate

Kitchens spread cost across cabinets, counters, appliances, backsplash, flooring, lighting, and plumbing and electrical work. The worksheet method matters even more there because a single choice, such as cabinet approach, can move the total more than all the paint and trim lines combined.

List cabinets as their own section, with boxes, doors or refacing approach, hardware, and installation as sub lines if quotes provide them that way. List counters by area takeoff, material placeholder, templating and installation if quoted separately, and cutouts. List appliances as counted items with their own delivery and connection lines if applicable.

Keep the backsplash takeoff separate from counter area. They are different materials, different trades in some jobs, and different waste patterns. Measuring them together hides errors.

Sequence also matters for a kitchen budget. If flooring runs under cabinets in one quote and only to the cabinet edge in another, their flooring quantities will differ legitimately. Note the approach in the scope, not just the quantity.

Keeping the worksheet alive during the project

A worksheet is not a one time form. Update it when a product is chosen and an allowance becomes a real price, when a quote is accepted, and when a change is agreed. Give every change its own line with a date and a short description. Do not overwrite the original line silently, because then you lose the ability to explain why the total moved.

Track actual spending in a column beside the planned amount. Small overruns on many lines add up to the same total as one large overrun, and the column shows you which pattern is happening while there is still time to adjust optional items.

Save receipts and quote documents with the same line names as your worksheet. Filing by line, not just by date, makes a final review much faster.

FAQ

What should I do first, measure or set a total budget amount?

Start with scope and measurements, then build the worksheet up line by line. You may also have an overall amount you can spend, and that is important to know, but forcing lines to fit a total chosen before measuring hides which items are driving cost. Build the honest total first, then decide what to adjust, phase, or drop if you need to.

How much contingency should a bathroom refresh carry?

A common planning practice is 10 percent to 20 percent of the subtotal, with more hidden work and older homes tending toward the higher end of that planning range. A cosmetic refresh with no wall opening is lower risk than a job that opens walls and floors. Pick a percentage, state your reason on the worksheet, and apply it consistently when comparing quotes.

Should I buy materials myself or have the contractor supply them?

Either approach can work, and the worksheet helps either way. If you supply materials, you own delivery timing, product choice, and leftover returns. If the contractor supplies them, confirm which products, warranty handling as stated by the contractor, and markup or handling lines if they appear on the quote. Record who supplies what on each line, so nothing is bought twice or not at all.

Why do quotes for the same room vary so much?

Usually because scope, materials, preparation, and inclusions differ, even when the room is the same. One quote may include waterproofing, disposal, and finishing, another may not state them. A side by side worksheet in shared categories exposes those differences, so you can ask specific questions instead of choosing on total alone.

Can I phase a kitchen or bathroom project to spread cost?

Sometimes, yes, if the phases do not undo each other. Painting and hardware changes are often separable. Tile, plumbing, and counters are more interdependent, and splitting them can create rework. List phased items as optional or phase two lines in the worksheet, and confirm sequencing with the contractor who would do the work.

Calculators and next steps

Run your takeoffs with these tools, then enter the quantities into your worksheet before you contact contractors.

• Backsplash calculator: https://mississippimaple.ca/tools/backsplash.html
• Tile calculator: https://mississippimaple.ca/tools/tile.html
• Paint calculator: https://mississippimaple.ca/tools/paint.html
• Discount calculator: https://mississippimaple.ca/tools/discount.html
• Trim calculator: https://mississippimaple.ca/tools/trim.html

Next steps: write your scope list including exclusions, measure each surface in metres, run each takeoff and note the waste percentage you used, create labour placeholder lines by task, choose a contingency percentage and write down why, and build the side by side quote table before the first quote arrives.

Sources and figures

Measurement and conversion figures in this guide use standard relationships, including 1 square metre equals about 10.764 square feet. Product coverage figures, such as paint coverage per litre and tile box coverage, should be taken from the manufacturer information for the specific product you choose, because coverage varies by product. The contingency range of 10 percent to 20 percent is described here as a common planning practice, not as a guaranteed cost or a recommendation for a specific project. All example dollar figures are example only placeholders for teaching arithmetic and layout. They are not quotes, not price estimates for your project, and not market rates. Get current, written quotes for your own scope and region before committing.

Estimates only, verify before you buy materials. This guide plans quantities and costs; it does not replace local building codes, manufacturer instructions, or professional advice.