Quick Summary
Mostly, but not entirely, and any contractor promising a rewire with no openings at all is promising something the construction usually will not allow. New cable is routed through attics, crawl spaces, closets and existing wall cavities wherever it can be, and small targeted openings are cut where it cannot. What decides the ratio is the building rather than the electrician: whether the house is raised or on a slab, whether there is attic access above the ceilings, whether the walls are drywall or plaster, and whether the framing has fire blocking in the way. Big Easy Electricians rewires across Orleans, Jefferson, and St. Tammany parishes and prices the making good as part of the job rather than as a surprise. Estimates are free.
Last Updated: August 2026
On This Page
- Can a House Be Rewired Without Removing Drywall?
- What Does Fishing a Wire Actually Mean?
- Which Parts of the House Make It Easy or Hard?
- Does Plaster Change the Answer?
- What Openings Are Usually Unavoidable?
- Does a Raised House Make It Easier Than a Slab?
- What Are the Alternatives Where Fishing Will Not Work?
- How Do You Get a Realistic Answer for Your Own House?
- Frequently Asked Questions
This question is nearly always really a question about disruption and cost, and it deserves a direct answer rather than reassurance. The honest version is that the number of openings is mostly a property of the house, can be estimated closely from a survey, and should appear in the quote, which is something an electrician working across the metro can establish during the survey.
Can a House Be Rewired Without Removing Drywall?
Largely yes on a house that cooperates, and never completely. The realistic description is a rewire with limited, deliberate openings rather than a gutted interior: cable routed through concealed spaces wherever possible, and small cuts made at the points where there is no other route.
What separates a good job from a destructive one is planning the route before cutting anything. An electrician who surveys the attic, the crawl space, the closet backs and the existing device boxes first will find paths that one who starts at the wall will not.
The claim to be skeptical of is a flat promise of no damage. New cable has to reach every device in the scope of the work, and where a route genuinely does not exist, the choice is an opening or an unnecessarily long detour. Both are fine. Pretending neither will happen is not.
What Does Fishing a Wire Actually Mean?
Feeding new cable through an enclosed space using flexible rods or a fish tape, without opening the surface along its length. The cable enters at one accessible point, travels inside the wall or ceiling cavity, and emerges at another, typically an existing device box.
It works well going vertically inside a stud bay from an attic or a crawl space, and it becomes difficult as soon as the run has to cross framing. What stops a fish is almost always something solid in the cavity:
- Fire blocking between studs, which is common in older framing and invisible from outside
- Top and bottom plates that have to be drilled from above or below
- Insulation, particularly blown-in material that has settled into the cavity
- Existing plumbing, ductwork, or old wiring already occupying the route
- Blocking added during a previous remodel that nobody documented
Where cable does pass through framing it has to be protected against fasteners driven later, which is why plates go on the studs at those points. That detail is invisible once the wall is closed and is one of the things an inspector will look for on the way through.
Which Parts of the House Make It Easy or Hard?
Anywhere with a concealed space above or below is easy. Ceilings under an accessible attic, walls that run up into that attic, and floors over a crawl space are all straightforward, because the cable can travel horizontally out of sight and drop or rise into position.
| Where the cable has to go | Usually fishable | Why |
|---|---|---|
| Ceiling under an accessible attic | Yes | The run travels above and drops into position |
| Wall running up into that attic | Yes | A vertical drop inside the stud bay |
| Floor over a crawl space | Yes | The run travels underneath and rises where needed |
| Interior wall with neither above nor below | No | Nothing to feed from, so the framing has to be crossed |
| Kitchen or bathroom wall | Rarely | Cabinetry and tile occupy the surface |
| Insulated exterior wall | Sometimes | Settled blown-in insulation can block the cavity |
The hard areas are consistent across this housing stock. Interior walls on a middle floor with no space above or below, kitchens and bathrooms where cabinetry and tile occupy the wall, exterior walls that are insulated and often furred out, and any wall a previous remodel has already run something through.
Stairwells and hallways sit in between and often turn out to be the useful route, because they connect levels vertically and are usually finished in materials that are easy to open and make good. A survey that has not looked at those is not a survey. This is also where adding circuits for a home office is often cheapest to combine with the rewire.
Does Plaster Change the Answer?
Yes, in both directions. Plaster and lath is less forgiving to open than drywall, breaks beyond the cut line if it is handled roughly, and takes a skilled repair rather than a patch and a sand. In a historic property the making good can be a larger cost than the electrical work.
It also changes what is behind the wall. Older construction here often has shiplap or diagonal sheathing behind the plaster, and balloon framing without the fire blocking that later methods use, which can make a vertical run from the attic to a first-floor device unexpectedly straightforward.
The practical consequence is that plaster houses reward planning and punish improvisation more than drywall ones do. Every opening should be deliberate, sized for the work, and placed where a plasterer can make it disappear, which usually means fewer and slightly larger rather than many and small.
What Openings Are Usually Unavoidable?
A small number, in predictable places. Where a run has to cross framing with no access above or below, at junctions the code requires to remain accessible, and at the panel end where several circuits converge and the wall has to take them all.
The typical pattern on a house that fishes well is a series of hand-sized openings at plate level, one or two larger ones near the panel, and the existing device boxes reused wherever they are sound. Everything else stays closed.
What makes this manageable is that the locations are decided at survey rather than discovered at work. A quote that lists where the openings will be, and who is responsible for repairing and repainting them, is a quote you can compare. One that does not mention them has simply moved the cost rather than removed it, and settling that in advance is part of what to settle before electrical work starts.
Does a Raised House Make It Easier Than a Slab?
Usually, and it is one of the biggest single factors in this market. A raised house gives a crawl space under the whole floor, so cable can travel horizontally underneath and rise into walls at the point it is needed, which removes most of the reasons to open a wall at all.
Slab construction removes that option entirely. Everything has to go up into the attic and come back down, so a device on an interior wall of a slab house with a ceiling above is reachable, and one on an exterior wall behind cabinetry may not be without an opening.
Neither is a barrier, and both are knowable before anyone quotes. Where a slab house also has a low or inaccessible attic over part of its footprint, that specific area is where the openings will be, and saying so in advance is the difference between a planned job and an argument halfway through.
What Are the Alternatives Where Fishing Will Not Work?
Several, and they are legitimate rather than compromises. Surface raceway in a garage, utility room or workshop where appearance matters less. Rerouting a circuit to approach a device from a different direction. Relocating a device slightly to a position that can be reached.
The other common answer is scope rather than method. A partial rewire that replaces the circuits which genuinely need replacing, leaving sound ones alone, often avoids the worst routes and is frequently the right call on a house that is not uniform, though it depends on where the bad circuits actually run. Adding a subpanel closer to the load can also shorten difficult runs, which is covered in when a subpanel is the better answer.
What is not an alternative is leaving a run unprotected, splicing outside an enclosure to avoid a difficult pull, or burying a junction box behind a finished surface. Those turn a routing problem into a defect that an inspection will find, and they show up in the repair calls that come in most often.
How Do You Get a Realistic Answer for Your Own House?
Have the routes surveyed rather than the rooms counted. The answer depends on access above and below, on the framing, on where the panel sits relative to the rooms, and on what previous work has already put in the walls, and none of that can be judged from a room count or a photograph.
A useful survey opens the attic hatch and the crawl space, pulls the covers off a sample of devices, checks the panel location against the rooms that need circuits, and looks for evidence of earlier remodeling. It should end with a route plan and a list of expected openings.
The document to ask for is that list, because it is what makes competing quotes comparable and what stops the making good from arriving as an extra later. The work itself sits under house rewiring, new circuits fall under installation work, and the condition assessment that decides how much needs doing is a documented inspection.
Frequently Asked Questions
Can every room be rewired without opening the wall?
No. Rooms with accessible space above or below usually can, while interior walls with neither, and walls behind cabinetry or tile, generally need at least one opening to get cable across framing.
Who repairs the openings afterward?
That depends entirely on the contract, which is why it belongs in the quote. Some electricians patch and leave the finish to a decorator, and others price the making good as part of the work.
Is fishing wire safe in an old house?
It is normal practice, and the care needed is about what else is in the cavity, since old wiring, plumbing and ductwork all share those spaces and none of them is visible from outside.
Can I live in the house during a rewire?
Often yes, and it depends on the scope and on the contractor’s own safety arrangements rather than on scheduling alone. Where it is workable, the sequence is planned so power is lost room by room rather than all at once.
Does a rewire mean new outlets everywhere?
Existing boxes are often reused where they are sound and correctly located, though a rewire is the natural moment to add the outlets a modern house needs and to correct any that sit awkwardly.
Will insulation in the walls stop the cable?
It can, particularly blown-in material that has settled, and that is one of the things a survey looks for before promising a route through an exterior wall.
Is a partial rewire worth doing?
Often, because houses here are rarely uniform and circuits added during later remodels are frequently sound while the original ones are not. What defines the scope is what the assessment found rather than the age of the work on its own.
Get the Routes Surveyed Before Anyone Quotes
How much of a house can be rewired without opening walls is a fact about the building, and it can be established in a single visit by someone who looks in the attic and the crawl space rather than at the rooms. Big Easy Electricians surveys the routes, lists where openings will be needed, and prices the making good rather than leaving it to appear later. The estimate is free. Call 504-226-7555 or describe the property on the contact page, including whether it is raised or on a slab and whether the attic is accessible, since those two answers settle most of it. Homeowners still deciding whether to hire the work out will find the reasoning in why a licensed electrician matters in this market.