How Long Does a Bathroom Remodel Take? A Week-by-Week Timeline for Greater Boston

How long does a bathroom remodel take? On my jobs in Somerville and Cambridge, a typical full bathroom takes about 3 to 5 weeks of construction, plus a few weeks of design, ordering and permits before anyone picks up a hammer.

So from first meeting to final inspection, most homeowners should plan on roughly two to three months. Here's how that time breaks down, what slows it down, and how to survive it if it's your only bathroom.

How long does a bathroom remodel take? The short answer

These are the ranges I plan around for a standard full bathroom in an older Greater Boston home. Your project may be shorter or longer.

Before demo: design, ordering and permits

The fastest bathrooms are the ones fully planned before demo. That means the layout is set, and the valve, toilet, vanity, tile and lighting are chosen and ordered.

• Building permit. Under the Massachusetts building code (780 CMR 105.3.1), the building official must issue or deny a permit in writing within 30 days of filing. Complete applications move faster.
• Somerville paperwork. Applications go through the city's online portal, and the ISD Building Division lists the documents a contractor must submit, including licenses, the signed contract, affidavits and a site safety plan. A missing document is the most common reason a permit sits.
• Plumbing permit. Under 248 CMR 3.00, the inspector must act on a plumbing permit application within two working days, though acting isn't the same as approving.

My Somerville building permit guide covers the full process.

Bathroom remodel steps, week by week

1. Week 1: protect and demo. Floor protection, dust walls and, in pre-1978 homes, lead-safe containment. Then demo and haul-out. This is when we find out what's really behind the tile.
2. Week 2: repairs and rough-in. Fix subfloor and framing, then the plumber and electrician run new lines. Under 248 CMR 3.00, new plumbing can't be covered until it's tested if required, and the inspector may require both a rough and a final inspection. The inspector must act within two working days of being notified.
3. Week 3: walls and waterproofing. Insulation where needed, cement board, waterproofing at the shower, and tile starts.
4. Week 4: tile, grout and paint. Floor and wall tile, grout, then the vanity and paint.
5. Week 5: fixtures and finals. Toilet, faucets, lights and fan get installed, the shower glass is measured and installed, and the final plumbing, electrical and building inspections close out the permits.

What causes delays in Somerville and Cambridge

• Incomplete permit applications or plan review questions.
• Inspection scheduling. Walls can't close until the rough inspections pass.
• Special-order tile and fixtures that arrive late or damaged.
• Hidden rot and old pipes. In early-1900s triple-deckers around Teele Square or East Somerville, I often find rotted subfloor at the toilet, old cast-iron drains or wiring that needs updating.
• Mid-project changes. A new tile choice after demo can cost a week.
• Work hours. Somerville allows construction Monday to Friday 7 a.m. to 7 p.m. and Saturday 9 a.m. to 7 p.m., per the city's Building Division page.

Small bathroom remodel timeline vs. a full gut

• Cosmetic refresh (paint, new floor tile, vanity swap with no pipe changes): often days rather than weeks. Somerville doesn't require a building permit for painting, tiling and flooring, but replacing a faucet or valve still needs a licensed plumber and permit.
• Full gut, same layout: the 3 to 5 week schedule above.
• Layout change or new bathroom: longer, because drains, vents and sometimes framing all change.

Living through a remodel with one bathroom

Many triple-decker units and Cambridge condos have just one bathroom. Here's how my clients get through it:

• Know your no-toilet days. I schedule so the toilet is out for as few days as possible, usually around demo and tile.
• Line up a backup: a gym, family nearby, a vacant unit in the building, or a short stay elsewhere during demo week.
• Use the kitchen sink for brushing teeth and washing up.
• Keep kids and pets out of the work area. In pre-1978 homes, lead-safe rules require a certified supervisor on site while work is underway, and containment is there for a reason. See my post on lead paint in older homes.

Need a hand?

If you want a bathroom done on a real schedule in Somerville, Cambridge, Medford or Greater Boston, book a free walkthrough. I'll map out your timeline, flag likely surprises, and send a written line-item budget, usually within 48 hours.

About the author

Mateus Magno is the founder of Magno & Co — a licensed Massachusetts Construction Supervisor (CS-123658), registered Home Improvement Contractor (HIC #220484) and certified Lead-Safe Renovator Supervisor who has renovated and managed over $3 million in projects across Greater Boston.

More about Mateus →