Basement remodeling · Licensed & insured · Old work brought to code

Basement remodeling for the basement someone finished before you, redone to last.

Wood paneling, a musty carpet, a drop ceiling with stained tiles and outlets that do not quite work: an old finished basement often looks fine until you open a wall. A supervisor checks what is behind the finishes, then prices three routes, from a cosmetic update to a new layout.

Text a photo of the room and one of the ceiling. A supervisor who redoes basements answers within 5 minutes on business days.

  • $35k–$70kTypical full rebuild
  • 7 wksTypical rebuild time
  • 4.9410 reviews
  • 24hWritten estimate

What happens after you text us

We ask what the basement smells like. It tells us what is behind the walls.

A musty smell in a finished basement nearly always comes from something hidden. The supervisor asks about it, requests a photo of the ceiling tiles and the lowest part of the walls, and books a walkthrough with a moisture meter.

  • The smell and the ceiling stains point to hidden moisture
  • We ask if the old work had permits, since it changes the scope
  • The walkthrough includes lifting a corner of carpet
Text me my quote

What a basement remodel costs

Remodeling a finished basement costs $15,000 to $120,000. What is behind the walls sets the tier.

Ranges are for 700 to 1,000 square feet of basement that was finished years ago. Most homeowners end up in the middle tier, because the old insulation or wiring behind the paneling needs replacing once it is seen.

Cosmetic update

$15k–$30k

Framing and walls stay, surfaces change. Three to four weeks when nothing hidden is wrong.

  • Paneling painted or skimmed
  • Old carpet out, vinyl plank in
  • New ceiling tiles or drywall
  • LED lighting replaces old fixtures
  • New doors, trim and paint
  • Outlets and switches replaced
Get my basement update price

New layout

$75k–$120k+

Walls moved, rooms added or a bath rebuilt in a new spot. Nine to eleven weeks with permits.

  • Everything in Strip and rebuild
  • Walls moved to a new floor plan
  • Old bathroom rebuilt or relocated
  • Bedroom made legal with egress
  • Wet bar or storage wall added
  • Sound insulation under the floor
Get my new basement layout price

Gauge your basement remodel cost

Pick the route, the size of the basement and the kind of house. The price range adjusts to each choice, taken from our supervisors' tiers.

A range, not a quote. Your written estimate comes after the visit and does not change once you approve it.

Typical range for your answers$35,000 to $70,000

Get this range as my written remodel price

Where the money goes

Tear-out and hidden repairs take a fifth of the budget. New finishes take the rest.

Averages from our recent strip-and-rebuild basements. Removing old finishes and fixing what they hid is the line that surprises people, so we price it on its own instead of burying it in labor.

Get my itemized basement remodel
AI concept: Old wood paneling pulled back to show damp fiberglass insulation against a concrete wall
The paneling looked fine; the insulation behind it was wet against the concrete

Keep the old framing or strip it

Keep the framing when it is dry and square. Strip to the concrete when it is not.

A cosmetic update is half the price of a rebuild, but only if the studs, insulation and wiring behind the old finish are sound. At the walkthrough we open one small section and write down which route your basement needs.

What we find behind the wallWe recommend
The studs are dry and sit on treated lumberKeep the framing
Fiberglass batts touch the bare concrete wallStrip to concrete
Moisture readings are low and there is no smellKeep the framing
Wall studs sit directly on the slab and show stainsStrip to concrete
The wiring was permitted and has grounded outletsKeep the framing
Old work was done without permitsStrip to concrete

How long it takes

A strip and rebuild takes about seven weeks, including a week for surprises.

A cosmetic update takes three to four weeks, a new layout nine to eleven. Every schedule includes a short buffer after tear-out, because old basements always show something once the walls are open.

AI concept: Supervisor opening a small section of old basement paneling
AI-generated concept

Before we start

Walkthrough and test cut

One panel opened, moisture measured, old permits checked, three written prices, new permit filed.

AI concept: Basement stripped to the studs with old carpet removed
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Week one

Tear-out and findings

Paneling, carpet and ceiling removed under dust control, findings photographed and priced with you.

AI concept: New rigid insulation and wiring in a basement remodel
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Weeks two to four

Repairs and rough-in

Mold and damp insulation cleared, walls insulated, wiring and ducts redone, rough-in inspected.

AI concept: Remodeled basement family room with new flooring
AI-generated concept

Weeks five to seven

Finish and walkthrough

Drywall, ceiling, flooring and trim, lights and outlets live, final inspection, walkthrough with you.

What sits behind old basement walls

Behind half the paneling we remove, the insulation is damp against the concrete.

Basements finished decades ago used methods we now know trap moisture. These six findings come up most when we strip one, each shown to you in photos, priced as its own line and approved before we fix it.

52%

Damp fiberglass against concrete walls

Batts pressed on cold concrete collect condensation and mold. We remove them and use rigid foam that does not hold water.

37%

Wiring added without permits

Extension-style wiring, open splices and ungrounded outlets are common. We rewire those circuits to current code.

33%

Stained ceiling tiles from a leak above

The drop ceiling hid a slow drip from a pipe or bathroom. We find and fix the leak before the new ceiling goes up.

29%

Mold on the back of carpet pad

A cold slab under carpet makes the pad damp. We remove it, treat the slab and lay a floor that tolerates moisture.

24%

Bedroom with no legal way out

A room called a bedroom with no egress window cannot be listed as one. We price the window and well to make it legal.

18%

Old 9 by 9 inch floor tiles

Tiles of that size in older basements may contain asbestos. We test before removal and use a licensed abatement crew if needed.

What replaces the old finishes

Every replacement is chosen to survive a basement, and named in the estimate.

The old basement failed because upstairs materials went below grade. We list the product for each layer, so you can see the rebuild is not a repeat of the old mistakes.

AI concept: Mineral wool insulation board on a basement wall
AI-generated concept

Mineral wool board

Rockwool Comfortboard on the concrete does not absorb water, resists mold and keeps its insulating value if it ever gets wet.

AI concept: Paperless drywall installed in a basement
AI-generated concept

Paperless drywall

Georgia-Pacific DensArmor Plus has a fiberglass face instead of paper, which gives mold nothing to feed on in damp spots.

AI concept: Rigid core vinyl plank flooring over concrete
AI-generated concept

Rigid core vinyl plank

Mohawk SolidTech or similar rigid core planks are fully waterproof, feel warmer than tile underfoot and click together over a slab.

AI concept: Slim LED wafer lights in a low basement ceiling
AI-generated concept

Slim LED lighting

Halo or Juno wafer lights need only an inch of depth, so they fit under ducts and beams where old can lights would not.

AI concept: Sound insulation batts between basement ceiling joists
AI-generated concept

Sound insulation

Rockwool Safe'n'Sound in the ceiling and interior walls cuts footsteps from upstairs and keeps a media room from carrying.

AI concept: Whole-basement dehumidifier near a utility room
AI-generated concept

Dehumidifiers

A Santa Fe or Aprilaire whole-basement dehumidifier holds humidity near 50 percent, which stops the musty smell from coming back.

Written into every contract

Six promises you can hold us to.

Price lock

The approved price is the final price. Change orders only with your written approval.

On-time or we pay

A credit for every working day of delay we cause. Weather and inspections excepted, in writing.

Clean site, every day

Dust barriers, floor protection and a clean-up before we leave. Your home stays livable.

Daily update guarantee

A text or email every working day with photos and tomorrow's plan, or the day is free.

10-year warranty

Workmanship warranty in writing, transferable to the next owner, backed by a fixed address.

Milestone payments

A small deposit, then you pay only for work that is already completed, inspected and photographed.

Price my remodel with these guarantees

Who is in your house

Three named people redo your basement, start to walkthrough.

Tear-out is dusty, so we seal the stairwell and run air scrubbers. Every person on the crew is background-checked and introduced before day one, and you get a text when anyone new is coming.

AI-generated role illustrations. People shown are fictional, not photographs of your assigned crew.

AI concept: Fictional remodeling professional illustrating a project role
AI-generated concept

Basement remodel supervisor

Opens the test cut, prices findings, updates you daily.

AI concept: Fictional remodeling professional illustrating a project role
AI-generated concept

Lead carpenter

Strips old work, reframes, insulates and hangs doors.

AI concept: Fictional remodeling professional illustrating a project role
AI-generated concept

Licensed electrician

Replaces old wiring and grounds every new outlet to code.

Illustrative project scopes

Basement remodeling: scope and budget examples.

Planning examples with illustrative budgets and durations. These are not completed customer jobs, invoices or promises about your project.

AI concept: Paneled den, cosmetic update
AI-generated concept

Paneled den, cosmetic update

Example budget
$21,600
Example duration
4 weeks
Record type
Illustrative scope
AI concept: Strip and rebuild, 900 sq ft
AI-generated concept

Strip and rebuild, 900 sq ft

Example budget
$58,900
Example duration
7 weeks
Record type
Illustrative scope
AI concept: New layout with rebuilt bath
AI-generated concept

New layout with rebuilt bath

Example budget
$97,300
Example duration
10 weeks
Record type
Illustrative scope

Your basement is not average

Your old basement has a history. Here is how it changes the price.

The three tiers above are where we start. These are the cases we see most with basements that were finished years ago, and what each one does to scope, cost or time.

Inherited from the last owner

When you did not do the old work, you do not know what is behind it. We open one wall section before pricing, check the town's permit records, and tell you which parts of the old finish can be kept safely.

Check my inherited basement

Paneling from decades ago

Thin wood paneling was often nailed straight to furring strips on the concrete. We remove it, check the wall for moisture and cracks, and plan insulation that suits a wall that breathes through the seasons.

Price my paneled basement redo

A musty smell that lingers

A smell that lingers after cleaning comes from damp insulation, carpet pad or a hidden leak. We find the source with a meter and a test cut, fix it first, and add a dehumidifier so the smell does not return.

Find the source of my basement smell

The kids have outgrown it

The old playroom with carpet and toy shelves can become a teen room, a gym or a guest suite. We keep the framing that still works, change the rooms that do not, and add outlets and storage for the new use.

Rework our basement for older kids

Updating without a full rebuild

If the walls are dry and the wiring is sound, paint, new flooring, a new ceiling and LED lights can change the room for a fraction of a rebuild. We only suggest this after checking what is behind the paneling.

Price a lighter basement update

A relative will live down there

Turning an old rec room into a room for a parent or a grown child means a legal bedroom, a working bathroom and separate heat control. We price each piece so you can see what a comfortable suite really costs.

Price a basement room for a relative

Old work done without permits

Unpermitted basements can cause real trouble at sale. We open the walls enough for the inspector, correct whatever does not meet code, and close the permit, so the finished space is on record when you sell.

Get my unpermitted basement fixed

It should feel like upstairs

Low ceilings, small windows and dark corners make a basement feel like a basement. We raise what we can, use slim lights, lighter floors and larger egress windows, so the space reads as part of the house.

Make my basement feel like upstairs

What this service is

Basement remodeling, and how it differs from finishing.

Basement remodeling is the renovation of a basement that was already finished, replacing outdated or failing paneling, carpet, ceilings, insulation, wiring and layouts with materials suited to below-grade space, and correcting hidden moisture, mold or code problems found along the way. ProBuild Remodeling performs it as a licensed general contractor with permits under our license.

It covers cosmetic updates when the old framing is sound, full strip-and-rebuild projects back to the concrete, and new layouts that move walls, rebuild a bathroom or make a bedroom legal. It includes tear-out, disposal, repairs of what is found and new finishes. Turning a bare, never-finished basement into living space is the separate basement finishing service.

It is for homeowners who bought a house with an old finished basement, families whose basement smells musty or no longer fits how they live, and owners whose past work was never permitted. It is not the service for active flooding, which needs basement waterproofing first.

Terms on a basement remodel estimate

Test cut
A small opening made in an old wall before pricing, to see the insulation, studs and moisture behind the finish.
Furring strips
Thin wood strips fastened to a concrete wall to hold paneling or drywall. They trap moisture against the wall.
Mineral wool
Insulation made from spun stone. It does not absorb water or feed mold, so it suits basement walls.
Abatement
Safe removal of materials such as asbestos floor tile by a licensed crew, following state and federal rules.
Legalizing a room
Bringing an existing room up to code with egress, ceiling height and alarms so it can be called a bedroom.
Air scrubber
A fan unit with a HEPA filter that cleans the air during tear-out, so dust and spores stay out of the house.
Grounded outlet
A three-prong outlet wired with a ground conductor. Older basement wiring often lacks one, which code requires.
Closed permit
A permit that the building department has inspected and signed off, so the work shows as approved on record.

Basement remodel questions

Eight questions about redoing an old basement, answered plainly.

How much does it cost to remodel a finished basement?

A cosmetic update of 700 to 1,000 square feet costs $15,000 to $30,000. A strip and rebuild back to the concrete costs $35,000 to $70,000. Moving walls, rebuilding a bathroom or legalizing a bedroom runs $75,000 to $120,000 or more.

Why does my finished basement smell musty?

Usually because something behind the finishes is damp: fiberglass against concrete, carpet pad on a cold slab or a slow leak from above. Air fresheners do not fix it. The source has to be found, removed and dried.

Can I keep the old paneling and just paint it?

Yes, if the wall behind it is dry and the paneling is solid wood or a firm veneer. We check first with a moisture meter and a small test cut. Painting over damp paneling traps the problem and the smell.

Do you need to remove everything to find mold?

No. We start with a moisture meter, the smell, and one small test cut in the likeliest spot. If that shows mold or wet insulation, we price removing that wall section or the whole wall, depending on how far it runs.

What if the previous owner finished the basement without a permit?

It is common. We open enough of the walls for an inspector to see the framing, wiring and plumbing, correct what does not meet code, and close out a permit, so the space is recorded properly when you sell.

How long does a basement remodel take?

Three to four weeks for a cosmetic update, six to eight for a strip and rebuild, and nine to eleven for a new layout. Each schedule includes a short buffer after tear-out for what old basements reveal.

Will you test old floor tiles for asbestos?

Yes. Old 9 by 9 inch tiles and their black adhesive may contain asbestos. We send a sample to a lab before touching them. If positive, a licensed abatement crew removes them or we cover them with a new floating floor.

Is it cheaper to remodel than to finish a bare basement?

Not always. Tearing out old work adds labor and disposal, and fixing what it hid adds more. A strip and rebuild often costs close to finishing from bare concrete, while a cosmetic update costs much less when the old work is sound.

Basement remodeling near you

Your remodeling address, within our service area.

Old basements are redone by nearby crews who know local permit records and building rules, working under the license your state requires. Every number is posted on our licenses page.

  • Maine
  • New Hampshire
  • Massachusetts
  • Rhode Island
  • Connecticut
  • New York
  • New Jersey
  • Pennsylvania
  • Delaware
  • Maryland
  • Virginia
  • North Carolina
  • South Carolina
  • Georgia
  • Florida
  • Check your remodeling address

Free basement remodel estimate

Tell us what the old basement looks like. We will find out what is behind it.

Send the your answers and a photo. A supervisor who redoes basements replies within 5 minutes during business hours and schedules a walkthrough with a test cut.

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Images marked as AI concepts illustrate remodeling ideas, materials and conditions. People shown are fictional role illustrations, not actual ProBuild employees. Images are not photographs of completed ProBuild projects or verified before-and-after pairs.

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