Home Renovation Budget Planner: A Room-by-Room Cost Guide

Every renovation goes over budget. Yours will too. The question is whether it goes over by 8% or by 80%. The difference is almost always how realistic the original number was — and how much fat you padded in before the first sledgehammer swing.

What follows is a 2026 cost guide based on actual quotes pulled from across the country. Not the inflated builder-mag numbers, not the fairy-tale Pinterest numbers. Real ones.

The single most important number: contingency

Before any specific room, build this into your spreadsheet:

• 10% contingency for cosmetic-only projects (paint, flooring, fixtures).
• 15–20% contingency for any project where you'll open walls.
• 25–30% contingency for older homes (pre-1980), where you'll find one surprise per wall: knob-and-tube wiring, galvanized supply lines, asbestos tile, lead paint.

Anyone who tells you they don't need a contingency has never finished a renovation.

Kitchen renovation

Kitchens are where most homeowners get sticker shock. The labor is intense, the trades are stacked (demo, plumbing, electrical, drywall, paint, flooring, cabinets, counters, appliances), and even small changes ripple.

• Cosmetic refresh (paint cabinets, new hardware, new faucet, lighting): $4,000–$10,000
• Mid-range remodel (new cabinets, quartz counters, mid appliances, no layout change): $25,000–$55,000
• Full remodel with layout changes / island add: $55,000–$110,000
• Luxury / custom kitchen: $110,000–$250,000+

Where homeowners get burned: moving the sink (re-plumb), moving the stove (re-vent, re-gas), and discovering the floors aren't level after the cabinets come out.

Bathroom renovation

• Powder room refresh: $1,500–$5,000
• Full bath, mid-range (new tub/shower, vanity, tile, toilet): $12,000–$28,000
• Primary bath remodel (custom tile, double vanity, walk-in shower): $28,000–$65,000
• Add a brand-new bathroom: $20,000–$60,000+ depending on plumbing access

Basement finishing

• Basic finish (frame, drywall, paint, carpet, lighting): $30–$55/sq ft
• With a bathroom: add $12,000–$25,000
• With a wet bar or kitchenette: add $8,000–$18,000
• Egress window install (often required for a bedroom): $3,500–$8,000

The hidden killer: water. Don't finish a basement that takes on water. Fix the drainage first ($3,000–$15,000) or you'll be tearing everything out within five years.

Whole-house painting

• Interior, 1,500 sq ft house: $3,500–$7,500
• Interior, 2,500 sq ft house: $5,500–$11,000
• Exterior, single-story: $4,500–$9,500
• Exterior, two-story with prep: $6,500–$15,000

Flooring (per sq ft, installed)

• Vinyl plank: $4–$9
• Laminate: $4–$8
• Engineered hardwood: $9–$18
• Solid hardwood: $12–$25
• Refinish existing hardwood: $4–$8
• Tile (standard ceramic): $9–$18
• Carpet: $4–$8

Roof, HVAC, windows — the big-ticket "boring" stuff

• Architectural asphalt roof, average house: $9,000–$18,000
• Standing-seam metal roof: $20,000–$45,000
• HVAC replacement (3-ton, 16 SEER, ducts ok): $9,000–$15,000
• Heat pump conversion: $14,000–$25,000 (often partially offset by federal/state credits)
• Window replacement (per window, mid-grade vinyl, installed): $750–$1,400

Outdoor / curb appeal

• Wood deck (per sq ft): $30–$55
• Composite deck: $50–$80
• Concrete patio: $10–$20
• Paver patio: $25–$55
• Fence (6-ft cedar, per linear ft): $35–$70

How to actually plan it

1. Get three written quotes. Not estimates. Quotes with line items, materials specified, and timelines.
2. Discount the lowest one. If a quote is more than 20% below the others, ask why. There's always a reason — usually cheaper materials, missing scope, or a contractor who doesn't pull permits.
3. Pay in milestones, not deposits. 10% to start, then payments tied to defined completed phases.
4. Hold back 10% until the final punch list is done. This single move solves 90% of the "they ghosted me before fixing the trim" problems.
5. Budget for living during the project. Renovating a kitchen? Add 2 months of takeout to your spreadsheet.

When you're ready to start collecting quotes, browse home-renovation pros on MyHelpZone and find vetted general contractors and specialty trades near you.