Renovation Design Planning, Step by Step

Most renovation stress comes from decisions made too late. A tile chosen after the plumber has roughed in the shower, a range that does not fit the cabinet opening, a pendant with no junction box where it needs to hang. Each one costs time and money, and most are avoidable with planning done in the right sequence.

This guide sets out that sequence for a typical home renovation, whether you are redoing a kitchen, a bathroom or several rooms. It works whether you hire a designer, an architect and a contractor, or manage parts of the project yourself.

Key takeaways

  • Write a brief before you sketch. Needs, wants, budget range and timeline, in writing.
  • Measure accurately and record existing conditions, including what is behind the walls where you can find out.
  • Set a budget with a contingency. A 10 to 20 percent reserve is a common rule of thumb, with more for older homes.
  • Finish design and selections before demolition. Layout, plumbing, electrical and fixture choices drive what happens inside the walls.
  • Get comparable bids on the same drawings and specifications.
  • Order long-lead items early and confirm delivery dates.
  • Close out with a punch list and keep all documentation.

The renovation sequence at a glance

Step What you produce Who is typically involved
1. Brief A written list of goals, needs, wants, budget range and timeline You and your household
2. Measurements and existing conditions Measured plan, photos, notes on structure and systems You, designer or architect
3. Budget and contingency A working budget by category with a reserve You, with input from professionals
4. Design development Layout options, then a chosen plan with elevations Designer or architect
5. Selections A schedule of finishes, fixtures, appliances and lighting You and your designer
6. Permits Approved permit drawings where required Architect, designer or contractor; local building department
7. Contractor bids Comparable bids and a signed contract You and contractors
8. Ordering and lead times Orders placed and delivery dates confirmed You, designer, contractor
9. Construction Demolition, rough-in, inspections, finishes Contractor and trades
10. Punch list and close-out Completed fixes, warranties, manuals, final payment You, contractor, designer

Real projects overlap these steps, but trying to skip ahead usually costs more than it saves.

Step 1: Write the brief

A brief is a short document that keeps everyone, including you, honest about what the project is for. Include:

  • Problems to solve: not enough storage, no place to sit, poor light, a bathroom that cannot be cleaned.
  • Must-haves and nice-to-haves, in two separate lists.
  • How you live: who cooks, how many people use the bathroom in the morning, whether you work from home, pets, accessibility needs now and later.
  • Style direction: a handful of reference images and a few words describing the feel.
  • Budget range and timeline, including any fixed dates such as a new baby or a lease ending.
  • What stays: furniture, appliances or fixtures you intend to keep.

Step 2: Measurements and existing conditions

Accurate measurements prevent expensive surprises later.

  • Measure each room wall by wall, including window and door positions, sill heights, ceiling heights and any soffits, beams or bulkheads.
  • Locate existing plumbing, gas, electrical panels, outlets, switches, vents and radiators.
  • Photograph everything, including inside cabinets and under sinks.
  • Note floor levels between rooms, which matter when new flooring changes thickness.
  • Record the age of the home. In the United States, homes built before 1978 may contain lead-based paint, and older homes in many countries may contain asbestos in some materials. Test before disturbing suspect materials and follow the rules that apply where you live.

For larger projects, a designer or architect will usually prepare a measured drawing. Even if you have one, keep your own photos as a record.

Step 3: Budget and contingency

Break the budget into categories so trade-offs are visible.

Category What it covers
Design and professional fees Designer, architect, engineer, surveys
Permits and inspections Fees set by your local authority
Construction labor Demolition, framing, trades, finishing
Materials Drywall, tile, flooring, trim, paint
Fixtures and fittings Faucets, toilets, showers, sinks, hardware
Cabinetry and built-ins Kitchen and bath cabinets, closets, shelving
Appliances Cooking, refrigeration, laundry
Lighting and electrical fixtures Fixtures, dimmers, controls
Contingency Unknown conditions and changes
Living costs during work Takeout, storage, temporary housing if needed

Rules of thumb that many professionals use:

  • Contingency: keep 10 to 20 percent of construction costs in reserve, more for older homes or projects that open many walls.
  • Get real numbers early. Online averages are a poor substitute for a local contractor’s rough estimate on your actual scope.
  • Decide where to spend. Things you touch every day (faucets, cabinet hardware, work surfaces) often justify a higher spend; things that are easy to change later (paint, decorative lighting, accessories) can wait.

Step 4: Design development

Design development moves from ideas to a buildable plan.

  1. Layout options: two or three ways to arrange the space, tested against the brief.
  2. Chosen plan: dimensioned, with clearances for walkways, door swings and appliance doors.
  3. Elevations: drawings of each wall showing cabinets, tile, windows and fixture heights.
  4. Lighting and electrical plan: fixtures, switches, outlets, dimmers and any data or speaker wiring.
  5. Plumbing plan: fixture locations and types, since valves and drains are installed long before the trim you see.

Moving plumbing and structural walls is typically where costs rise fastest. If the budget is tight, keeping wet areas roughly where they are is a common way to save.

Step 5: Selections

Selections are every specific product the project needs. Record them in a selections schedule: item, location, maker, model, finish, quantity, supplier, price and lead time.

Typical selections include:

  • Flooring, tile (including trim pieces and grout color) and wall finishes
  • Cabinetry style, finish, interior fittings and hardware
  • Countertops and backsplash
  • Plumbing fixtures and their valves
  • Appliances, with exact model numbers and installation specifications
  • Lighting fixtures and bulbs, with color temperature
  • Doors, windows, trim and paint colors

See our guides to backsplash materials, bathroom tile and layered lighting for help with specific choices.

What to decide before demolition

This is the most important checklist in the guide. Once walls are open, these decisions are expensive to change.

  • Final layout, including any wall removal (confirmed safe by a qualified professional)
  • Exact positions of sinks, toilets, showers, tubs and floor drains
  • Shower valve type and trim, plus any body sprays, handhelds or niches
  • Appliance models, dimensions, power and gas requirements, and ventilation routes
  • Cabinet layout and sizes, including filler panels and appliance panels
  • Lighting fixture locations, switch locations and dimmer types
  • Outlet locations, including inside cabinets, islands and for under-cabinet lighting
  • Blocking in walls for grab bars, wall-hung vanities, heavy shelves, TVs and curtain hardware
  • Flooring type and thickness, and how transitions between rooms will work
  • Tile layout, including where cuts fall and where niches align with grout lines
  • Window and door sizes, if any are changing
  • HVAC changes, such as moved vents or added ventilation

Step 6: Permits

Many renovations need permits, especially those involving structural changes, electrical, plumbing, gas, mechanical systems, windows or changes in use. Cosmetic work such as painting or replacing a countertop often does not, but the threshold varies by location.

  • Ask your local building department or check its website for what requires a permit.
  • Your designer, architect or contractor may prepare and file the drawings.
  • Build permit review time into the schedule; it varies widely.
  • Inspections typically happen at stages, such as after rough-in and before walls are closed. Do not close walls until required inspections are passed.
  • If you live in a condo, co-op or homeowners’ association, there may be separate approvals and work rules.

Unpermitted work can cause problems with insurance and when you sell, so do not skip this step to save time.

Step 7: Contractor bids

  • Get bids from several contractors, often three, on the same drawings and selections schedule.
  • Read the scope line by line. Make sure each bid includes the same work, the same quality of materials and the same exclusions.
  • Watch allowances. An allowance is a placeholder amount for items not yet selected. Low allowances make a bid look cheaper than the real cost.
  • Check licensing, insurance and references in the way that applies where you live.
  • Agree a payment schedule tied to milestones, not dates, and avoid large up-front payments beyond what is normal locally.
  • Put the change order process in writing: how changes are priced, approved and scheduled.

Step 8: Lead times and ordering

Lead times vary greatly by product, maker and season, and they can change quickly. Custom cabinetry, special-order windows and doors, imported tile, some appliances and certain lighting can take weeks to months. Our guides to steel windows and doors and metal cladding cover two exterior choices with long lead times.

  • Ask for lead times when you make selections, not when construction starts.
  • Order long-lead items as soon as the design is final and dimensions are confirmed.
  • Inspect deliveries on arrival for damage and correct quantities, including spare tile for future repairs.
  • Arrange safe, dry storage for materials.

Step 9: Construction

A typical order of work is protection and demolition, structural work, rough-in for plumbing, electrical and HVAC, inspections, insulation, drywall, then finishes such as tile, cabinets, counters, flooring, paint, fixtures and hardware. Your contractor will manage the sequence, but knowing it helps you understand why a late decision can stop the job.

Keep a running log of decisions, change orders and photos of walls before they are closed. Those photos are invaluable later.

Step 10: Punch list and close-out

The punch list is a written list of items to fix or finish before the project is complete.

Punch list checklist:

  • Walk every room in good daylight and again with all lights on.
  • Test every faucet, drain, toilet, appliance, outlet, switch and dimmer.
  • Open and close every door, drawer and window.
  • Check paint touch-ups, caulk lines, grout and trim joints.
  • Look for scratches or chips on counters, floors, tile and fixtures.
  • Confirm final inspections are passed and permits are closed.
  • Collect manuals, warranties, paint colors, product lists and spare materials.
  • Make final payment after the punch list is complete, according to your contract.

FAQ

How much contingency should I hold for a renovation?

A common rule of thumb is 10 to 20 percent of construction costs. Older homes and projects that open many walls often warrant the higher end or more.

Do I need a designer or architect?

It depends on scope and local requirements. Structural changes and some permit applications may require licensed professionals. Simple cosmetic updates often do not. Our guide to working with an interior designer covers when it helps.

What should I decide before demolition starts?

The layout, plumbing and electrical locations, fixture and valve types, appliance specifications, cabinet layout and blocking for anything wall-mounted. These are expensive to change after walls are open.

Why do contractor bids vary so much?

Bids often differ in scope, materials, allowances and exclusions. Compare them line by line on the same drawings before comparing totals.

How long does a renovation take?

It varies with scope, permitting, lead times and contractor availability. Planning and ordering often take as long as construction, so start early.