A gut renovation strips a house, or part of one, down to the structure: walls to the studs, floors to the subfloor, and the old wiring, plumbing and ductwork out. Then everything is rebuilt, often with a new layout. It costs more and takes longer than a standard remodel, so it makes sense when the problems sit behind the walls: failing systems, damaged framing, hazardous materials, or a floor plan that cannot be fixed with new finishes.
Norman Builders is a design-build remodeler based in Newton, NH, renovating homes in the Merrimack Valley, the North Shore, the Seacoast and southern New Hampshire since 2007. Many homes here are 100 to 200 years old: structurally sound, but not built for how families live now. As our whole-house renovations page puts it, with our team and in collaboration with designers and architects, "we can develop a plan to gut it to the studs completely." This guide explains what a gut renovation involves, what it costs, how long it takes, and how to decide whether you need one.
What Is a Gut Renovation?
A true gut renovation usually includes:
- Removing plaster or drywall down to the studs
- Removing flooring down to the subfloor
- Taking out all cabinets, fixtures and appliances
- Replacing or substantially updating the wiring and electrical service
- Replacing supply and drain plumbing
- Replacing or reworking heating, cooling and ductwork
- Adding insulation while the walls are open
- Repairing whatever structural damage turns up
It can cover the whole house or just one area. A gut of one or two bathrooms, or of a kitchen, follows the same idea on a smaller scale.
Gut Renovation vs. Standard Remodel
| Standard remodel | Gut renovation | |
|---|---|---|
| Scope | New finishes, fixtures, cabinets; minor layout changes | Everything down to the structure; layout often redesigned |
| Systems | Mostly left in place | Wiring, plumbing and HVAC replaced or reworked |
| Permits | Fewer, depending on scope | Building, electrical, plumbing and mechanical permits and inspections |
| Living at home | Often possible | Usually not, for a whole-house gut |
| Timeline | Weeks (a basic bathroom about 3 to 5 weeks, per our renovation process guide) | Months (a whole-home renovation about 4 to 12+ months; a full-gut bath 6 to 10 weeks) |
| Best for | Sound houses that look dated | Older houses with failing systems, damage or a layout that does not work |
When a Standard Remodel Is Not Enough
- Wiring: knob-and-tube wiring, an undersized panel or too few circuits for modern kitchens and electronics.
- Plumbing: galvanized steel supply pipes or old cast iron drains that leak, corrode or clog.
- Structure: sagging floors, rotted sills or joists, or water damage you keep patching.
- Layout: small closed-off rooms, a kitchen with no room to work, too few bathrooms. Opening walls means moving the systems inside them.
- Energy: little or no insulation in the walls, which is easiest to fix when they are open.
- Hazardous materials: lead paint is common in homes built before 1978, and the EPA's Renovation, Repair and Painting Rule requires firms that disturb it in those homes to be lead-safe certified. Older flooring, insulation and pipe wrap can contain asbestos, which should be tested before it is disturbed.
If only one or two of these apply to one part of the house, a targeted renovation may do. Our Haverhill first-floor renovation removed interior walls for an open plan and rebuilt the kitchen on the main level, without taking on the whole house.
How Much Does a Gut Renovation Cost?
National figures give a starting point. According to This Old House's home renovation cost guide (updated March 2026, using Angi data), renovation runs about $15 per square foot for basic updates, $60 for a comprehensive renovation with moderate-quality materials and $150 for premium finishes and structural changes. A gut renovation belongs at the top of that scale, because it pays for structural work and new systems as well as new finishes. Our own whole-home and main-floor renovations, listed below, had budget bands from $200,000 to $1,000,000.
Price the Gutting and the Rebuild Separately
Ask for demolition, debris removal and any hazardous-material work as their own lines, apart from the rebuild. It makes estimates easier to compare, and it shows how much of the budget goes to work you will never see.
What Costs the Most
- New plumbing, electrical and HVAC throughout
- Structural changes, such as removing bearing walls, and repairs found after demolition
- Kitchens and bathrooms, which combine cabinets, tile, fixtures and several trades
- Lead or asbestos removal and mold remediation
- Design, engineering and permits
Plan a Contingency
This Old House recommends adding 10% to 15% to a contractor's estimate. On a gut renovation of an old house, plan toward the top of that range. For full cost ranges by scope, see how much it costs to renovate a whole house; for setting and managing the money, see our whole house renovation budget guide.
From Our Projects
These are Norman Builders whole-home and main-floor renovations, with budget bands as published on each project page:
- Whole-home renovation, Andover, MA (2026, $1,000,000, 2,900 sq ft): custom kitchen, spa-inspired primary bath with a curbless shower, mudroom, built-ins, wide-plank white oak floors and energy-efficient windows and doors throughout.
- Luxury whole-home renovation, North Andover, MA (2023, $700,000, 3,000 sq ft): redesigned kitchen with a walnut island, a family-room fireplace wall, a primary bath and mudroom storage.
- Coastal-inspired renovation, Andover, MA (2026, $200,000): walls opened between kitchen, dining and family room, two islands, a fireplace surround, a mudroom and a powder room.
Is It Cheaper to Renovate or Rebuild?
Renovating is usually cheaper when the foundation and frame are sound, because you keep them. When a house needs structural repair everywhere plus new systems and a new layout, the cost can approach new construction, and building new may be the better choice. We do both, so we can price both; see our new home construction page.
How Long Does a Gut Renovation Take?
Our renovation process guide puts a whole-home renovation at about 4 to 12 months or more. Before construction there is design, selections, permits and ordering, and custom cabinets and windows can take weeks to arrive. Old houses add time once they are opened up. A Newburyport client whose 120-year-old house we renovated wrote that "once the walls were opened up there were many obstacles to be negotiated to meet the design specifications," and that "work never stopped from October 1st thru the end of the job six months later."
Living Through It
For a whole-house gut, plan to move out for at least part of the job. An Andover client whose project included structural work, plumbing, HVAC and sewer work wrote: "With two little kids we needed to move out of our house for 4 months." Budget for rent and storage, move valuables out before demolition, and agree with your contractor how you will get updates and when decisions are due.
Hiring the Right Team
- Look for whole-house experience, not just single rooms. Ask to see completed projects of a similar scope.
- Ask for an itemized estimate with demolition, systems, allowances and exclusions spelled out.
- Get the change process in writing: how changes are priced and approved before work is done.
- Check registration and insurance. In Massachusetts, contractors doing residential remodeling generally need Home Improvement Contractor registration, and structural work needs a Construction Supervisor License. New Hampshire has no statewide general contractor license, so ask for insurance certificates and references.
- Know who runs the job day to day and how often you will meet.
With design-build, one team designs and builds, so the plan is priced as it is drawn.
Frequently Asked Questions About Gut Renovation
How can I ensure I stay within my budget?
Fix the scope before demolition, compare itemized estimates that cover the same work, get allowances in writing, and keep a contingency of 10% to 15% (This Old House's guidance) that is only for problems found behind the walls. Avoid adding 'while we're at it' work mid-project unless it is priced in writing first.
How much should I budget for unexpected costs?
This Old House suggests adding 10% to 15% to a contractor's estimate. For a gut renovation of an older house, plan toward the top of that range, because once walls and floors are opened it is common to find rot, old wiring or plumbing that has to be replaced.
Is it better to live elsewhere during a gut renovation?
For a whole-house gut, usually yes. Water, power and heat are shut off for stretches, there is dust everywhere, and the crew works faster in an empty house. If only part of the house is gutted, you may be able to stay in the rest; ask your contractor before you sign.
What are potential unexpected issues during a gut renovation?
Rotted framing or subfloor from old leaks, knob-and-tube or undersized wiring, corroded galvanized or cast iron pipes, lead paint or asbestos, missing insulation, and framing that does not meet today's code. Most cannot be seen until demolition.
How long will my gut renovation take?
Our renovation process guide puts a whole-home renovation at about 4 to 12 months or more, and a full-gut bathroom at 6 to 10 weeks. Design, permits and material lead times come before construction, and older houses add time once the walls are open.
Will a gut renovation increase my property value?
It usually makes a house more valuable than it was, because buyers pay for updated systems, kitchens and baths. Whether you get back what you spend depends on the neighborhood and how far you go beyond what nearby homes offer. If resale is the goal, ask a local agent what renovated homes on your street sell for before you set the budget.
Thinking About a Gut Renovation?
Tell us what is not working in your house and we will walk it with you and talk through whether a gut renovation, a partial renovation or a smaller remodel fits. Call Norman Builders at (978) 833-7337 or request an estimate. You can also read what past clients say on our customer reviews page.
