Kitchen and Bathroom Completion: Complete Guide
Overview
Kitchens and bathrooms are the most expensive rooms per square foot and have the biggest impact on home value. They require coordinating multiple trades and finishes, with precise installation critical for both function and appearance. Most owner-builders successfully install cabinets themselves but hire out tile work and countertop fabrication — a hybrid approach that saves money while ensuring quality on the specialized work.
| Factor | Detail |
|---|---|
| Typical duration | 2-4 weeks |
| DIY difficulty | 4/5 |
| Typical cost | $25,000-$60,000 (varies enormously by selections) |
| When to hire | Cabinet install DIY-able; tile and counters often hired |
| Required inspection | Plumbing fixtures may require inspection |
When This Phase Happens
Kitchen and bath finishing happens near project end — after the room is painted and the floors are in. Getting the prerequisites done first keeps you from damaging finished surfaces or reworking cabinet measurements.
Must be complete first:
- Drywall finished and painted
- Flooring installed (or accounted for in measurements)
- Rough plumbing and electrical complete
- Tile backer board installed (if doing tile)
What comes after:
- Final painting touch-ups
- Final fixtures and hardware
- Punch list completion
Material Selection Budget Impact
Material grade is the single biggest swing in this phase. The same room can cost $6,000 or $88,000+ depending entirely on cabinets, counters, and appliance choices.
| Item | Budget Kitchen | Mid-Grade Kitchen | High-End Kitchen |
|---|---|---|---|
| Cabinets | Stock: $3,000-$6,000 | Semi-custom: $8,000-$15,000 | Custom: $20,000-$40,000+ |
| Countertops | Laminate: $800-$1,500 | Quartz or granite: $3,500-$6,500 | Premium stone: $8,000-$15,000+ |
| Appliances | Standard: $2,000-$4,000 | Mid-grade: $4,000-$8,000 | Premium: $10,000-$25,000+ |
| Tile / flooring | Vinyl or linoleum flooring (included in flooring budget) | Tile backsplash: $800-$1,500 | Custom tile/stone work: $3,000-$8,000+ |
| Total | $6,000-$12,000 | $16,000-$31,000 | $41,000-$88,000+ |
| Tier | Cost per bathroom |
|---|---|
| Budget | $3,000-$6,000 |
| Mid-grade | $8,000-$15,000 |
| High-end | $20,000-$40,000+ |
Step-by-Step Process
Week 1: Cabinet Installation
Cabinets are the most DIY-friendly part of this phase and the reference surface for counters, backsplash, and appliances. Level installation here determines whether everything downstream fits — take your time and shim to dead level.
Kitchen cabinet installation:
Day 1-2: Upper cabinets:
- Find high point of floor, measure up for cabinet height (typically 54" to bottom of uppers)
- Mark level line for cabinet bottoms
- Locate and mark all studs
- Start with corner cabinet (if applicable)
- Install mounting rail at line
- Hang corner cabinet, level and shim
- Secure through back into studs (2-3 screws top and bottom)
- Install adjacent cabinets, securing together with clamps before fastening
- Continue around kitchen
- Install crown molding if specified
Always install upper cabinets before lowers - much easier access. Remove doors before hanging (reinstall after secured).
Day 3-4: Lower cabinets:
- Find high point of floor
- Mark level line for cabinet tops (typically 34-1/2" for 36" counters)
- Start with corner cabinet
- Level front-to-back and side-to-side with shims
- Secure cabinets together before fastening to wall
- Secure through back into studs
- Install toe kick material
- Level all cabinets to highest cabinet (creates level counter surface)
Bathroom vanities: Same process, typically 32-34" height
| Issue | Fix |
|---|---|
| Out-of-level floors | Shim bottoms |
| Out-of-plumb walls | Shim backs |
| Walls not square | Adjust adjacent cabinets to compensate |
| Plumbing/electrical conflicts | Notch cabinet backs as needed |
Week 2: Countertop Installation
Laminate and butcher block are genuinely DIY-friendly. Stone is the one to hand off — fabrication is templated off your installed cabinets, the slabs are heavy, and undermount sink cutouts need professional tooling.
Laminate countertops (DIY-friendly):
- Measure precisely (template if post-form)
- Cut with circular saw (finish side down, score finish side first)
- Apply adhesive to cabinet tops
- Set countertop, ensure overhang is even (typically 1" to 1-1/2")
- Secure from below with screws through cabinet corner braces
- Install backsplash (4" standard or custom height)
- Seal edges with silicone
Stone countertops (hire fabrication, sometimes DIY install):
- Fabricator creates template after cabinets installed
- Fabrication takes 1-2 weeks
- Professional installation recommended (heavy, requires precision)
- Seams are unavoidable on large kitchens
- Undermount sinks require professional cutting
Butcher block (very DIY-friendly):
- Cut to size with circular saw
- Sand edges smooth
- Install with construction adhesive and screws from below
- Apply food-safe finish (mineral oil or polyurethane)
- Regular maintenance required (oil periodically)
Week 2-3: Tile Work
A backsplash is the most forgiving tile project — small area, no waterproofing stakes, and a great place to learn thin-set and grout technique before you ever attempt a wet area.
Tile backsplash (most DIY-able tile project):
Day 1: Preparation:
- Ensure walls are clean, dry, flat
- Plan tile layout (avoid small pieces at edges)
- Mark level line for first row
- Gather materials (thin-set, tiles, spacers, grout)
Day 2-3: Tile installation:
- Apply thin-set to wall with notched trowel (cover 3-4 sq ft at a time)
- Set tiles with spacers
- Keep level and plumb
- Cut edge pieces with wet saw or tile cutter
- Let set 24-48 hours
Day 4: Grouting:
- Mix grout to peanut butter consistency
- Apply with rubber float at 45° angle
- Force grout into joints
- Wipe excess with damp sponge (don't remove from joints)
- Buff haze after drying (30-60 min)
- Seal grout after 48-72 hours (sanded grout only)
Shower tile is much more complex than a backsplash and is often hired out. Get the waterproofing wrong and water damage follows — consider hiring unless you have tile experience.
Shower tile (much more complex - often hired):
- Requires waterproof backer board (cement board or Kerdi board)
- Must have proper slope to drain (1/4" per foot minimum)
- Waterproofing membrane critical
- Complex cuts around fixtures
- Mistakes cause water damage
- Consider hiring unless you have tile experience
The pre-slope is the #1 DIY waterproofing failure. On a traditional mortar-bed shower with a sheet membrane liner, you need two sloped mud beds, not one. First you pour a pre-slope (sloped fill) on the subfloor — sloping 1/4" per foot down toward the drain — then the liner goes on top of that slope, and then the second mortar bed (the tile setting bed) goes over the liner. Many DIYers set the liner flat on a level subfloor and only slope the top bed. Water that passes through the tile and grout (it will) then sits in a flat puddle on top of the liner with nowhere to drain to the weep holes, leading to a constantly wet bed, mold, and eventual failure. The liner must sit on a slope so trapped water drains. (Modern bonded-membrane systems like Kerdi handle this differently — follow the manufacturer's method exactly.)
Week 3-4: Plumbing Fixture Installation
The same rule applies to every fixture below: make the connections, run water, and watch for leaks before moving on. A drip you catch now is a five-minute fix; one you find later means water damage inside a finished cabinet.
Kitchen sink:
- Cut hole in counter per template (undermount) or drop-in
- Undermount: Apply silicone to underside rim, clamp from below
- Drop-in: Set in opening, secure with clips
- Connect supply lines (3/8" braided steel)
- Install drain with basket strainer
- Connect P-trap to drain rough-in
- Install garbage disposal if applicable
- Test for leaks
Kitchen faucet:
- Thread supply lines through sink holes
- Secure faucet from below with mounting hardware
- Connect supply lines to shut-off valves
- Install sprayer if separate
- Test for leaks
Bathroom vanity:
- Set vanity in place, level and secure
- Cut hole in counter for sink (if not pre-cut)
- Install sink (undermount or drop-in)
- Install faucet
- Connect supply lines
- Install drain assembly and P-trap
- Test for leaks
Toilets:
- Install new wax ring on flange (or wax-free gasket)
- Set toilet on flange, align closet bolts
- Press down firmly to compress wax ring
- Install washers and nuts on closet bolts (hand tight plus 1/4 turn)
- Connect water supply line
- Test for leaks
- Caulk around base (leave back gap for leak detection)
Showers/tubs:
- Most already installed during rough-in
- Install faucet trim and showerhead
- Install glass doors or curtain rod
- Caulk all penetrations with 100% silicone
Week 4: Final Details
Cabinet hardware:
- Plan hardware locations (measure or use template)
- Drill holes for knobs/pulls
- Install hardware consistently throughout
Lighting:
- Under-cabinet lighting (LED strips or pucks)
- Pendant lights over islands
- Vanity lights over mirrors
- Install after counters to avoid damage
Accessories:
- Towel bars and toilet paper holders
- Soap dispensers
- Mirror installation
- Medicine cabinets
- Shower caddies
Code Requirements
The IRC sections below govern fixture clearances, traps, GFCI protection, and kitchen exhaust. They are the items inspectors check on a kitchen and bath final, so build to them from the start.
| IRC section | Topic | Requirement |
|---|---|---|
| P2701.1 | Fixture clearances | Minimum clearances for toilets, showers, etc. |
| P2705.1 | Bathtubs | Floor under bathtub required |
| P3105.1 | Fixture traps | Each fixture requires properly sized trap |
| E3902.13 | GFCI | Kitchen and bathroom receptacles require GFCI protection |
| P2706 | Laundry | Laundry tray or washer box with trap required |
| M1507.3 | Kitchen ventilation | Range hood or other exhaust required |
Subcontractor Considerations
Cabinet installation is the easiest to take on yourself. Countertop fabrication and shower tile are the two jobs most owner-builders hand off — the pricing and lead times below help you decide where to spend.
| Work | Typical price |
|---|---|
| Cabinet installation | $75-$150 per cabinet or $1,000-$3,000 total |
| Countertop fabrication and install | $50-$150 per sq ft (material dependent) |
| Tile installation | $10-$25 per sq ft (complexity dependent) |
| Plumbing fixture install | $200-$500 per fixture |
| Work | Timeline |
|---|---|
| Cabinet install | 1-3 days |
| Countertop template to install | 2-3 weeks |
| Tile work | 3-7 days |
| Plumbing fixtures | 1-2 days |
Common Mistakes
Nearly every costly mistake in this phase comes down to three things: cabinets that aren't level, openings that don't fit the appliances, or water that gets where it shouldn't. The rework costs below are why slowing down pays off.
1. Cabinets Not Level
- Why it's a problem: Countertops won't install properly, doors don't close, unprofessional appearance.
- How to avoid: Use level religiously. Shim to level. Take your time.
- Cost if you don't: $1,000-$3,000 to remove and reinstall.
2. Wrong Cabinet Height
- Why it's a problem: Counters at wrong height, uppers too high or low, affects function.
- How to avoid: Standard is 34-1/2" for lowers (36" counter height), 18" between counter and uppers.
- Cost if you don't: $500-$2,000 to adjust or replace.
3. Not Accounting for Appliances
- Why it's a problem: Dishwasher, fridge, or range don't fit in openings.
- How to avoid: Verify appliance dimensions before cabinet ordering. Leave proper clearances.
- Cost if you don't: $1,000-$5,000 reordering cabinets or appliances.
4. Poor Waterproofing in Showers
- Why it's a problem: Water damage, mold, structural issues, very expensive repairs.
- How to avoid: Use proper waterproofing membrane. Follow manufacturer instructions exactly.
- Cost if you don't: $5,000-$20,000 tear-out and rebuild.
5. Unsealed Stone Counters
- Why it's a problem: Staining, water damage, deterioration.
- How to avoid: Seal granite, marble, and other porous stones per manufacturer instructions.
- Cost if you don't: Permanent staining, damaged counters.
6. Improper Sink Installation
- Why it's a problem: Leaks, water damage to cabinets, mold.
- How to avoid: Follow manufacturer instructions. Test for leaks before declaring complete.
- Cost if you don't: $500-$3,000 water damage and repairs.
7. Wrong Grout Type
- Why it's a problem: Staining, deterioration, poor performance.
- How to avoid: Use sanded grout for joints 1/8" or wider, unsanded for smaller. Epoxy grout is recommended for showers because it's waterproof and stain-resistant, but properly sealed cementitious grout is also acceptable — epoxy is just more forgiving in wet areas.
- Cost if you don't: $1,000-$3,000 to remove and re-grout.
8. Tile Not Level/Plumb
- Why it's a problem: Looks terrible, lips between tiles, water pools.
- How to avoid: Use level constantly. Check flatness with straight edge. Adjust as you go.
- Cost if you don't: $2,000-$8,000 to remove and reinstall.
Quality Checkpoints
Run through every item below as a final check. Pay special attention to leaks at every connection and confirming GFCI outlets test and trip correctly — those two catch the failures that cause the most expensive callbacks.
- [ ] All cabinets level and plumb
- [ ] All cabinets secured to studs
- [ ] Cabinet doors aligned and close properly
- [ ] Countertops level with even overhang
- [ ] All seams tight (stone counters)
- [ ] Sink installed properly, no leaks
- [ ] Faucets installed and functional
- [ ] All tile level, plumb, and properly spaced
- [ ] Grout consistent color, no voids
- [ ] All plumbing fixtures installed and tested
- [ ] No leaks at any connection
- [ ] Hardware installed consistently
- [ ] Proper caulking at all wet areas
- [ ] GFCI outlets tested and functional
Budget Breakdown
Example for 2,000 sq ft house (1 kitchen, 2.5 baths):
| Item | Cost | Notes |
|---|---|---|
| **Kitchen** | ||
| Semi-custom cabinets | $10,000-$18,000 | 20 linear feet |
| Quartz countertops | $4,000-$7,000 | 45 sq ft |
| Tile backsplash | $800-$1,500 | Materials and labor |
| Sink and faucet | $400-$1,200 | Mid-grade |
| Appliances | $4,000-$8,000 | Range, hood, dishwasher, fridge |
| **Master Bath** | ||
| Vanity and counter | $1,500-$3,500 | Double sink |
| Shower tile | $2,000-$4,000 | With labor |
| Toilet | $200-$500 | Standard |
| Fixtures | $600-$1,500 | Faucets, shower |
| **Hall Bath** | ||
| Vanity and counter | $800-$1,500 | Single sink |
| Tub/shower surround | $600-$1,500 | Tile or acrylic |
| Toilet | $200-$500 | Standard |
| Fixtures | $400-$1,000 | Faucets |
| **Powder Room** | ||
| Vanity and counter | $500-$1,200 | Small |
| Toilet | $200-$500 | Standard |
| Fixtures | $200-$600 | Faucet |
| **Labor (if hiring)** | $6,000-$12,000 | Partial - some DIY |
| **Total** | **$31,800-$62,300** | Mid-grade selections |
Timeline Tips
The whole phase is gated by cabinet lead time. Order cabinets early, then template countertops off the installed cabinets, and stage appliances and trades around that critical path.
| Item | When to order / coordinate |
|---|---|
| Cabinets | 8-12 weeks before needed (long lead time) |
| Countertops | After cabinets installed (need exact measurements) |
| Appliances | 4-6 weeks ahead |
| All trades | Coordinate cabinet installer, countertop installer, tile setter, plumber |
What Comes Next
After kitchen and bath complete:
- Final painting touch-ups
- Final fixtures and hardware
- Punch list completion
Link to: Painting Phase
Need Kitchen and Bath Help?
Kitchens and bathrooms are complex, expensive rooms. If you're unsure about tile work or plumbing connections, a consultation can help you avoid costly mistakes.