Some remodeling projects go on for weeks and make a mess of your home life. Here’s what you need to know to survive.

Renovations can take weeks — and sometimes months. That means endless days of subcontractors traipsing through your home, noisy tools, and major dust. Even some minor projects can disrupt your daily routine. Before you begin to remodel, know what’s in store for you and your family.

We’ve highlighted nine common remodeling projects that homeowners are likely to undertake — projects that require professional contractors and that take at least one week to complete.

We also talked with veteran remodeler Paul Sullivan, who has renovated homes for 34 years and is president of The Sullivan Company in Newton, Mass.

Sullivan helped us rate each project on a “disruption scale” of 1 to 10, with 1 being the least disruptive to your everyday home life and 10 the most. If your project reaches a 10, consider getting a hotel room for the duration.

Attic Bedroom Conversion

National average cost: $51,696

Time: 8 to 10 weeks

What’s involved: A project that converts unconditioned attic space into a bedroom must include egress windows and at least one closet. Most likely, you’ll extend plumbing, HVAC ducts, and electrical wiring to the attic, and add insulation, drywall, and flooring.

Disruption scale: 3  Luckily, most of the work is in the attic and doesn’t involve your main living areas. You’ll have to put up with contractors moving through the house to get to the top, so provide drop cloths or old rugs to protect your floors. Also, plaster dust from drywall installation and finishing likely will float throughout your home, so you’ll want to change furnace filters every two to three weeks during the project.

Related: Install an Attic Dormer Window
Refinishing Hardwood Floors

National average cost: $1.50 to $4 per square foot

Time: 2 to 14 days

What’s involved: Sanding, staining, and sealing wood floors.

Disruption scale: 9  Whether you’re refinishing one floor or an entire house, the process involves a world of hurt. You have to move furniture and cover surfaces to protect from wood dust, which disrupts the flow of family life. And if you use oil-based sealants, you’ll have to live somewhere else to avoid breathing VOC fumes. Plus, you won’t be able to walk on floors for at least two days after the last coat of sealant is applied.

Related: Should You Refinish Hardwood Floors Yourself?

Bathroom Remodel

National average cost: $16,724

Time: 2 to 3 weeks

What’s involved: Turning your outdated bathroom into a dream spa includes updating plumbing fixtures, installing ceramic tile around a porcelain-on-steel tub, replacing an old toilet with a low-flow, comfort-height model, and installing ceramic floor tiles and solid-surface vanity counters.

Disruption scale: 7 to 10  If you’re remodeling your only bathroom, expect major disruption of your personal hygiene routine. You’ll have to wash in the kitchen sink, and install a portable potty in the yard or make friends with a neighbor when nature calls. You’ll have less pain if you have more than one bathroom in the house. Even then, you’ll suffer water outages during plumbing updates. And if you’re remodeling a master bath, you must put up with workman tromping through your bedroom.

Related: 7 Smart Strategies for Bathroom Remodeling

Major Kitchen Remodel

National average cost: $56,768

Time: 8 to 12 weeks

What’s involved: Replacing cabinets, installing a kitchen island and countertops, replacing appliances, adding lighting, and changing flooring.

Disruption scale: 8  Kitchens are the heart of the home, so when they’re down, you’ll eat out more, wash coffee cups in bathroom sinks, and hold family meetings in the family room where your microwave and fridge now live. To ease the disruption, your contractor can easily set up a construction sink somewhere by running a couple of hoses from existing kitchen plumbing through the dust wall to a make-shift kitchen in an adjacent room.

Related: 6 Green Kitchen Remodeling Tips

Minor Kitchen Remodel

National average cost: $19,226

Time: 1 to 2 weeks

What’s involved: Replacing cabinet box fronts, adding new hardware, updating appliances, sinks, and faucets, and installing new flooring.

Disruption scale: 5  Kitchen facelifts are less disruptive merely because they’re finished faster than major remodels. You’re mainly pulling and replacing, so plumbing and electrical can stay put, and you’ll still have access to your fridge until the new one arrives.

Related: 10 Tips for a Low-Cost Kitchen Facelift

Basement Remodel

National average cost: $62,834

Time: 4 to 6 weeks

What’s involved: Finishing the lower level of a house to create an entertaining area, wet bar, bathroom, and egress windows required by code.

Disruption scale: 2  Seems counter-intuitive, because turning unfinished space into extra living space requires all the finishes of a new addition — plumbing, electrical, flooring, walling, and insulation. But the good news: Work is confined to a part of the house you rarely use. Contractors can enter and exit through the basement door (if you have one), and noise and dust are easily confined. The biggest disruptions come from periodic electrical and plumbing outages.

Related: Add an Egress Window to Your Finished Basement
Roof Replacement (Asphalt Shingles)

National average cost: $19,528

Time: 1 week

What’s involved: Removing and replacing roofing moisture barriers, flashing, and shingles.

Disruption scale: 1  Replacing your roof is one of the least inconvenient remodeling projects you can do. You’ll have to put up with some banging, move your cars away from the house, and keep dogs and kids out of the yard during the demolish phase. Roofers will cover the ground around the job to corral debris; and after the job, they’ll go over your yard with a magnetic roller to pick up stray nails.

Related: Hurricanes: Protect Your Roof

Siding Replacement (Vinyl)

National average cost: $12,013

Time: 1 to 2 weeks

What’s involved: Removing and replacing old vinyl siding with new vinyl siding.

Disruption scale: 3  You’ll endure lots of banging around your house as the new siding goes up. If noise bothers you, stick in your earbuds and listen to something soothing. Even though contractors will cover the area around the house, expect some debris to litter the yard. Keep curious kids and pets inside while work is being done to avoid accidents.

Related: Siding: A Guide to the Options
Two-Story Addition

National average cost: $161,925

Time: 16 to 20 weeks

What’s involved: Framing, adding utilities, and finishing a 24-foot-by-16-foot wing including a family room and second-floor bedroom and bathroom.

Disruption scale: 4  Building an addition is like constructing an entire house attached to your house. But oddly, it’s life as usual until the very end, when you break through the wall that connects the two structures. Expect a lot of noise and trucks in your driveway throughout the project. The last one to two weeks, when you connect the structures, you’ll have to put up with some commotion — demolition, carpentry, drywall installation, and painting. Figure you’ll have a major cleanup job throughout the house when the construction is over.