Table of Contents
- Rough-in happens after demolition and framing and before insulation and drywall; walls stay open until inspections pass.
- Plumbing, HVAC and electrical trades share limited space, so the layout must be coordinated before anyone cuts or drills.
- Licensed tradespeople and the design professional handle filings and sign-offs; your contractor sequences them.
- Photograph every wall before closing it; those photos are your record of what is inside.
- Closing walls early to save time is how a small defect becomes a demolition job.
Demolition is the dramatic part of a gut renovation. Rough-in is the part that decides whether the finished apartment works. It is when every new wire, drain, supply line, gas pipe, duct and sprinkler head is placed inside walls and ceilings that are still open, and when the inspectors get their last look before drywall hides everything for the next fifty years.
This guide explains the rough-in stage for owners, board members and anyone trying to read a contractor's schedule: what is installed, in what order, what is inspected, what can go wrong, and what to photograph before the walls close. Details vary with the building and the municipality, and costs here are 2026 planning ranges as of October 2026, not quotes.
1. What Rough-In Means, and Where It Fits
A gut renovation moves through recognizable phases: protection and surveys, hazardous-material work, demolition, structural work and framing, rough-in, inspections, insulation, drywall, finishes and punch list. Rough-in sits in the middle, and it is the last phase where changes are cheap.
At rough-in the trades install everything that will live behind the finished surfaces:
- Electrical: service, panels, feeders, branch circuits, boxes, low-voltage cabling.
- Plumbing: drain, waste and vent piping, hot and cold supply, gas lines, shower valves and pans.
- HVAC: ducts, refrigerant lines, condensate drains, exhaust fans, and the heat pump or boiler connections.
- Fire protection and life safety: sprinkler piping where required, smoke and carbon monoxide device wiring.
What is not installed yet: fixtures, faucets, tile, cabinets, devices and finished flooring. That is the "finish" stage. The distinction matters, because rough-in is priced and scheduled differently, and mistakes in it are far more expensive to repair than a wrong faucet.
2. The Rough-In Sequence, Trade by Trade
The best rough-in schedules respect a simple rule: the least flexible system goes first. Drain lines need slope. Ducts need space. Wires can bend. The typical order below follows that logic.
- Framing and blocking. New partitions, soffits, furred walls and blocking for heavy fixtures and grab bars go in first. Locations for plumbing walls and chases are fixed here.
- Plumbing drains and vents. Cast iron or approved plastic drains, vents and stack connections are set to slope. Slab and joist penetrations are laid out carefully so that structure is not compromised.
- HVAC. Ducts, line sets and exhaust runs are routed. These are bulky and take priority over smaller lines.
- Plumbing supply and gas. Hot and cold lines, shower valves, water heater connections and gas lines are installed and pressure-tested.
- Electrical. Boxes, cable and conduit are installed last because they are the most flexible. Panels and feeders are often set earlier.
- Fire-stopping and sleeves. Penetrations through rated floors and walls are sealed using approved materials.
- Inspections. Trades and the design professional coordinate sign-offs before anything is covered.
- Insulation and close-up. Only after approvals do insulation, vapor barriers and drywall begin.
Why the order is rarely perfect
In real apartments, access, delivery and inspection timing interrupt this sequence. A project manager keeps the plan intact by walking the space with each trade before work begins and marking layout on the floors and studs. That coordination is not glamorous, but it is the difference between a clean job and a day-long argument about who gets to use a stud bay.
3. Electrical Rough-In in Detail
New electrical service is one of the most valuable upgrades in an older home. Pre-war apartments and many older houses were wired for far fewer circuits than a modern household uses.
What gets installed
A typical electrical rough-in includes a new panel or sub-panel, dedicated circuits for the kitchen, laundry, bathrooms and any high-draw appliances, lighting circuits, receptacles at code spacing, and low-voltage wiring for data, doorbell and audio. Smoke and carbon monoxide devices are wired in as required. If you plan induction cooking, a heat pump or EV charging, say so before layout, because those loads change the panel size and feeder.
Layout decisions to make before wire is pulled
- Switch and outlet heights for your furniture plan.
- Lighting layout, including recessed fixtures and ceiling height limits.
- TV, data and smart-home locations.
- Under-cabinet and island power.
- Future needs, such as an extra conduit run you can pull wire through later.
Where electrical rough-in goes wrong
The most common problems are boxes set at the wrong depth for the final wall surface, circuits shared across too many rooms, missing fire-stopping at penetrations and failure to label the panel. In a co-op or condo, shared shafts and riser capacity can also limit what the unit may draw, so confirm with the managing agent before design is final.
4. Plumbing and Gas Rough-In in Detail
Plumbing rough-in is where old buildings reveal their age. Galvanized supply lines, cast iron stacks that have been patched for decades and lead service lines in some older homes are all common. A gut renovation is the right time to replace what you can reach.
Drains, vents and stacks
Every fixture needs a trap, a vent and a properly sloped drain. Moving a bathroom or kitchen away from the existing stack adds length, slope, framing and cost. In multifamily buildings, stack work may require coordination with the neighbors above and below and a shutdown window agreed with the board.
Supply lines and shower valves
New copper or approved PEX supply lines are run to each fixture, with shutoffs placed where you can reach them. Shower valves and pans are set at precise depths so that tile and waterproofing finish flush. This detail is easy to get wrong and expensive to fix after tile.
Gas
Gas lines, if you keep gas, are installed and tested by licensed professionals. Under Local Law 102 of 2025, residential gas detectors are required near gas-fed appliances beginning January 1, 2027, so plan their power and placement now if your project will be completed near that date.
Waterproofing starts here
Wet rooms are protected by pans, membranes and curb details. Our bathroom gut renovation guide covers how waterproofing connects to rough plumbing and why inspection photos matter.
5. HVAC, Ventilation and Fire Protection
Ventilation is the system owners forget until the layout is done. Ducts need space, and space in an old building is precious. Decide your heating and cooling approach before framing is final: ducted systems need soffits or ceiling cavities, while ductless wall units need refrigerant lines and condensate drains.
Kitchen exhaust, bathroom fans and dryer vents must route to the exterior or approved shafts, which in a co-op may require board approval. Local codes affect how much outside air you need and where it can enter. The EPA's page on indoor air quality offers general background on why ventilation matters in tightly sealed renovated homes.
Fire protection varies by building: many high-rises require sprinkler heads and fire-stopping that must be rough-inspected before ceilings close. Houses mostly need smoke and carbon monoxide devices and proper fire-blocking in framing. Your design professional specifies what applies to your filing.
6. Permits, Licensed Trades and Inspections
In New York City, most gut renovation work requires a Department of Buildings permit. Alterations are filed through DOB NOW: Build by a New York State registered Design Professional acting as Applicant of Record, either a Registered Architect or a licensed Professional Engineer. The DOB's page on obtaining a permit explains the process in general terms.
Electrical and plumbing work in NYC is generally performed by licensed tradespeople, who also handle their own filings and sign-offs. Your general contractor does not replace those licensed trades. It sequences them. Inspections for these trades take place before walls are closed, and the exact inspections depend on your permit. Your design professional and trades coordinate them.
Outside New York City, rules differ:
- Long Island: the town, village or city building department issues permits and inspects. Verify requirements with the municipality.
- New Jersey: the local municipal construction office issues permits under the Uniform Construction Code, with separate subcode inspections, typically by electrical, plumbing, building and fire subcode officials.
A new Existing Building Code, enacted by Local Law 33 of 2026, is scheduled to take effect July 17, 2027 and will govern alteration applications after that. Until then, current rules apply. Not sure what your job needs? Start with our permit checker.
7. Inspection Day: A Checklist Before the Walls Close
Treat the inspection as a team event, not a surprise. The week before:
- Confirm that all trades finished and cleaned up debris from the open walls.
- Make sure fire-stopping and sleeves are complete.
- Confirm pressure tests were done and recorded.
- Check that every box, valve and cleanout location matches the drawings.
- Photograph every wall, ceiling bay and floor penetration with a tape measure in the frame.
- Verify that the permit is posted and the licensed trades' paperwork is on site.
- Confirm access, including elevator reservations and building contact for the inspector.
| Item | Who checks | When |
|---|---|---|
| Plumbing pressure test | Plumber and inspector | Before insulation |
| Electrical boxes, wiring and grounding | Electrician and inspector | Before insulation |
| Fire-stopping at penetrations | Contractor and inspector | Before drywall |
| Framing and blocking for fixtures | Contractor | Before drywall |
| Insulation and air sealing | Contractor and design professional | Before drywall |
If a rough-in inspection fails, the usual outcome is a list of corrections and a re-inspection. Scheduling the re-inspection is what costs time. Your contractor should tell you the same day what failed and when the next slot is.
8. What Rough-In Costs, and Where the Money Is
On a gut renovation, rough-in is not usually a separate invoice. It sits inside the all-in range for a full NYC gut of about $250 to $500-plus per square foot as a 2026 planning range, with higher-end or structural scopes reaching $500 to $1,000. Design, engineering and permit fees often add roughly 15 to 25 percent. Selective demolition and haul-away alone run about $8 to $30 per square foot depending on access and hazmat. Plumbing and electrical rough-in make up a significant share of the mechanical budget, and they scale with the number of wet rooms, the length of runs and the building's access rules.
Where owners get squeezed:
- Relocating a kitchen or bathroom far from existing stacks.
- Adding a second laundry or bar sink on a different floor.
- Upsizing electrical service in a building with limited riser capacity.
- Hidden conditions such as failed stacks, abandoned gas lines or uninsulated shafts.
- Re-inspection delays when the first inspection fails.
N.Y. Renovation Services prices rough-in as a clear line in an itemized quote, with allowances called out by name. A written quote governs the final number. You can see how rough-in fits in the full budget in our NYC renovation cost guide for 2026, and you can request a quote to have your own scope priced.
9. Why Licensed Coordination Beats a Patchwork Crew
A common way to get rough-in wrong is to hire each trade separately and hope they cooperate. The plumber sets a drain where the electrician needs a stud bay. The ductwork lands where the cabinet maker wants to hang a wall unit. No one owns the layout, and the problem surfaces only when the inspector or a tile setter finds it.
An in-house design-and-build team removes that gap. At N.Y. Renovation Services, one project manager owns the sequence from blueprints to the final coat of paint. We coordinate the licensed electrician and plumber, schedule inspections with the design professional, walk every wall with a camera before close-up, and keep a record of what is behind each surface. We also handle permitting and co-op or condo board paperwork when it applies, and we plan around building hours, elevator reservations and noise limits.
Compare that to the risks of an unlicensed or patchwork approach:
- Failed inspections that reset the schedule.
- Insurance and board problems if uncertified work is discovered.
- Leaks and shorts found after tile, cabinetry and paint are installed.
- Disputes between trades about whose error it was, with you paying for the rework.
Our pricing is transparent, contracts are detailed, and there are no hidden fees. We donate 5 percent of total project cost to a nonprofit of your choice. For the full process around rough-in, read our complete 2026 gut renovation guide.
10. Neighborhoods and ZIP Codes We Serve
Rough-in conditions differ across the area we serve.
- Chinatown (Manhattan): 10013, 10002. Mixed-use walk-ups, older tenement stock and commercial-residential buildings. Shared risers, narrow stairs and ground-floor commercial tenants often shape rough-in sequencing and shutdown notices. See our Chinatown co-op and condo gut renovation page.
- Midwood (Brooklyn): 11230. Detached and semi-detached homes and pre-war co-ops. Houses often have knob-and-tube remnants and older steel drains; co-ops add board rules.
- Kew Gardens (Queens): 11415. Pre-war co-ops, Tudor buildings and detached homes, where plaster, masonry walls and thick floors make routing a challenge.
- Annadale (Staten Island): 10312. Detached homes and townhouse complexes, where homeowner associations may add rules for exterior work.
- Oceanside (Nassau County, Long Island): 11572. Capes, colonials and waterfront pockets. Flood-zone rules may affect where mechanical equipment can be located. Permits come from the town building department.
- Hackensack (Bergen County, NJ): 07601. Mixed housing, condos and older homes. Permits come from the local construction office with subcode inspections.
For borough-specific information, see our pages for gut renovation contractors in Queens, Manhattan, Brooklyn and the Bronx.
11. Related Reading and Planning Tools
If rough-in is one chapter in a bigger plan, these pages fill in the rest.
- The cost of larger houses and townhouses is covered in our brownstone gut renovation cost guide.
- A realistic calendar for your project is easier with the renovation timeline planner.
- If your project includes a bathroom, our bathroom remodeling page shows the finish scope that follows rough-in.
A few questions to ask yourself before the walls close: Did you place every outlet where the furniture will be? Did you confirm the shutoff valves are accessible? Did you photograph every bay? Did you confirm the plan for kitchen exhaust? Ten minutes of checking now saves a drywall repair later.
12. Next Steps: Get a Free, Itemized Estimate
N.Y. Renovation Services offers a free estimate because the simplest way to avoid rough-in surprises is to have the scope written down before demolition starts. We visit, review drawings, check building rules, and give you an itemized estimate that separates demolition, structure, rough-in, inspections, finishes and permits.
To get started:
- Collect floor plans, photos and your building's renovation rules, if any.
- List which rooms get new plumbing or electrical loads.
- Request your free estimate or call (347) 455-1741.
- We schedule a site visit and deliver an itemized written quote.
N.Y. Renovation Services serves Manhattan, Brooklyn, Queens, the Bronx, Staten Island, Long Island and nearby New Jersey, Monday through Saturday, 8:00 AM to 5:00 PM. Phone or text works.
Safety Note: All work follows OSHA 30 safety and EPA Lead-Safe practices for pre-1978 homes. Check local permit requirements before starting.
James - Lead Renovation Editor. With over 20 years in renovation and construction, James writes and edits our guides. More about James