# Commercial Repiping in Philadelphia

> Commercial repiping in Philadelphia: metallic water pipe required outside homes and apartments, corner stores with apartments above, L&I fees, after-hours work.

URL: https://philadelphiafreedomrepipe.com/commercial-repiping/

Water supply piping in stores, offices, restaurants and mixed-use corner buildings replaced in the metallic pipe the Philadelphia code requires, scheduled around business hours.

Last Updated: October 26, 2026

**P-605.4** Philadelphia code section requiring metallic water supply piping in occupancies other than one- and two-family dwellings and apartments

**$189** L&I alteration permit, other occupancies, for the first 7 fixtures; $22.50 for each one after

**$126** L&I fee for each water line, waste line or stack repaired or replaced in other occupancies

**4 ft** Minimum copper or similar metallic pipe at a water heater's inlet and outlet under Philadelphia's EZ standards

[Philadelphia Freedom Repipe](https://philadelphiafreedomrepipe.com/) repipes the water supply in small commercial and mixed-use buildings across Philadelphia and nearby Delaware, Montgomery and Bucks County suburbs: corner stores with apartments above, storefront offices, small restaurants and converted rowhouses with a business on the ground floor. The job is the same as in a house, old supply pipe out and new pipe in from the main shutoff to each fixture, with two differences that change everything else. The pipe has to be metallic, and the water-off windows have to fit around a business.

Licensed and insured contractors carry out the work; inside the city, a Philadelphia licensed master plumber oversees the job and pulls the L&I permit. Where a project needs engineered drawings or a design professional, the scope says so and names who provides them.

## Why commercial space needs metallic pipe

Philadelphia’s plumbing code, amended effective April 1, 2024, draws a line by occupancy. Section P-605.4 says that any water supply piping supplying or located within occupancies other than one- and two-family dwellings and apartments shall be metallic piping, and P-605.3 applies the same rule to water distribution pipe. A store, office, restaurant or any other non-residential use falls on the metallic side of that line. In practice that means copper for most small commercial repipes.

L&I’s own approved scopes show how the rule reads on a permit. Commercial and mixed-use permits state that all piping for conveyance and supply for the commercial space shall be metallic, while one- and two-family scopes in the same records name PEX. The difference is the reason a corner property costs more to repipe than the rowhouse next to it with the same fixture count. The guide to [whether PEX is allowed in Philadelphia](https://philadelphiafreedomrepipe.com/guide/is-pex-allowed-in-philadelphia/) covers the rule in full, and the [copper repiping](https://philadelphiafreedomrepipe.com/copper-repiping/) page covers the material.

Other rules follow from the same occupancy line. Flexible water connectors are allowed only in one- and two-family dwellings and apartments, so a commercial sink or equipment connection is made with rigid metallic pipe or a listed fitting instead. Where an occupied floor sits more than 75 feet above fire-access level, metallic pipe is required throughout under P-605.4.1. A pending update to the Philadelphia code, Bill No. 250645, would also require pipe 3 inches and larger to be ductile iron to the meter; its enactment had not been verified when this page was written, so check with L&I before planning a large service.

## Corner stores with apartments above

The mixed-use corner property is the commercial building Philadelphia has most of: a store or bar on the ground floor and one or two apartments above, often in a building that started as a rowhouse. Its plumbing is usually a single main from the meter feeding both uses, with the apartment’s riser running up through the store’s ceiling or a back room.

That layout puts the material rule at its sharpest. The store side has to be metallic. The apartment side is a dwelling, where nonmetallic pipe is allowed, but any pipe serving or running through the store sits within the commercial occupancy. A riser that crosses the store ceiling to reach the apartment is therefore planned in metal, and the apartment’s own branches may be PEX or copper. Because the rule turns on where each pipe runs, L&I should confirm the apartment side before materials are ordered, and the quote should say which runs are metallic.

The other gain from repiping a corner building is separation. Labeled shutoffs that isolate the store from the apartments let a leak upstairs be stopped without closing the business, and the reverse. The [apartment building repiping](https://philadelphiafreedomrepipe.com/multi-unit-repiping/) page covers buildings with more than one apartment above.

## Scheduling around the business

A house repipe is scheduled around the people living there. A commercial repipe is scheduled around opening hours, deliveries and the residents upstairs. The usual approach does everything that can be done with the water on during the day, and moves cutovers and the noisiest cutting to closed hours: early mornings, evenings, or the days the business does not open.

Business water-off windows go in writing: which fixtures lose water, when, and for how long. A restaurant’s prep sinks and restroom have to be back before it opens; a retail store may only need its restroom. Where stock or equipment sits under the work, it is covered or moved before the ceiling opens. Press-connect copper fittings help in occupied commercial space because they need no torch near stock and ceilings, and the Philadelphia code allows them above ground. Inspections still run on the City’s schedule, so the plan has to leave room for them before ceilings close.

After-hours work changes the price, and the quote should say which hours are planned. Nothing about the schedule is assumed; it is set on the walk-through with whoever runs the business.

## Permit and fees in the other-occupancy column

Replacing water piping in Philadelphia needs an L&I permit, with a licensed master plumber overseeing the work. L&I’s [fee summary](https://www.phila.gov/media/20260729134349/PG_012_INF_Summary-of-construction-permit-fees-Eff-1.1.2025-Rev-7.2026.pdf) puts commercial work in the other-occupancies column:

| L&I permit line | One- and two-family | Other occupancies |
| --- | --- | --- |
| Alterations to existing buildings | $50 for the first 7 fixtures, $22.50 each after | $189 for the first 7 fixtures, $22.50 each after |
| Repair or replacement of water lines, waste lines, stacks | $37 | $126 each |
| Water heater | $31 | $37 per heater |

A $100 filing fee, applied toward the final fee, plus a $3 city surcharge, a $4.50 state surcharge and $4 per plan for record retention are added. L&I’s EZ permit, which needs no plans, covers alterations in buildings with four or fewer dwellings up to four stories; whether a given commercial or mixed-use repipe fits it, or needs plans, is L&I’s call. The [Philadelphia repipe permit guide](https://philadelphiafreedomrepipe.com/guide/philadelphia-repipe-permit/) and the guide to [who can do plumbing work in Philadelphia](https://philadelphiafreedomrepipe.com/guide/who-can-do-plumbing-work-philadelphia/) cover the filing and the license.

In the suburbs, townships enforce the Pennsylvania Uniform Construction Code, which adopted the 2021 International Plumbing Code effective January 1, 2026, and each township or borough’s own permit and contractor rules apply. Norristown, for one, separates a residential contractor license for single-family dwellings and duplexes from a master plumber license for non-residential work.

## What moves a commercial repipe price

There is no reliable published range for commercial repiping. The drivers are clear:

| Driver | Why it moves the price |
| --- | --- |
| Metallic pipe throughout the commercial space | Copper costs more than PEX as material and takes more fittings |
| Fixture and equipment count | Each sink, restroom, prep station and equipment connection is a branch; it also sets the permit fee |
| Apartments above | A separate riser, separate shutoffs and residents to schedule around |
| Ceiling and wall finishes | Drop ceilings open easily; plaster, tile and finished storefronts do not |
| Working hours | Closed-hours work and short windows add days |
| The main shutoff and service line | A seized [main shutoff](https://philadelphiafreedomrepipe.com/main-water-shutoff-replacement/) or a lead service line adds scope at the start |

## Related resources

- [PEX vs copper for a repipe](https://philadelphiafreedomrepipe.com/guide/pex-vs-copper-repipe/), and why the choice is made for you in commercial space
- [Copper pinhole leaks](https://philadelphiafreedomrepipe.com/guide/copper-pinhole-leaks/) and their several causes
- [Whole-house repiping](https://philadelphiafreedomrepipe.com/whole-house-repiping/) for the residential side of a building
- [Repiping cost in Philadelphia](https://philadelphiafreedomrepipe.com/guide/repiping-cost-philadelphia/), with the residential ranges and fees

## What's included

- A walk-through of the commercial space, any apartments above, and the main from the meter
- Metallic supply piping for everything serving or running through the commercial space
- Branches to sinks, restrooms, prep areas and equipment connections in the scope
- Water heater connections with the metallic section the code requires
- Labeled shutoffs that let the business and each apartment be isolated separately
- A schedule built around opening hours, with water-off windows in writing
- The L&I permit in the other-occupancy column, pulled by a licensed master plumber
- A pressure test before ceilings and walls close, then a flush after cutover

## Material and permit rules by what the building is used for

|  | House or apartment only | Corner store with apartment above | Store, office or restaurant only |
| --- | --- | --- | --- |
| Water pipe allowed | PEX or copper | Metallic for anything serving or inside the commercial space; confirm the apartment side with L&I | Metallic |
| L&I alteration fee | $50 for the first 7 fixtures (one- and two-family) | $189 for the first 7 fixtures (other occupancies) | $189 for the first 7 fixtures (other occupancies) |
| Flexible water connectors | Allowed where accessible | Allowed in the dwelling only | Not allowed |
| Scheduling | Around the people living there | Around the business and the residents above | Around opening hours |
| Typical cost | Published ranges on the cost guide | No published range; priced from the scope | No published range; priced from the scope |

## Guides for this work

- Learn [Is PEX Allowed in Philadelphia?](https://philadelphiafreedomrepipe.com/guide/is-pex-allowed-in-philadelphia/)What the Philadelphia Plumbing Code says about PEX water pipe: where it is allowed, where metal is required, the rules at the water heater and the fittings, the pending code bill, and how the suburbs differ.
- Decision Guide [PEX or Copper: Which Is Better for Repiping a Philadelphia House?](https://philadelphiafreedomrepipe.com/guide/pex-vs-copper-repipe/)How PEX and copper compare for a Philadelphia repipe: what the city code allows, how each handles Philadelphia water, cold basements and rodents, what each means for the walls, and which way each moves the price.
- Learn [Do You Need a Permit to Repipe a House in Philadelphia?](https://philadelphiafreedomrepipe.com/guide/philadelphia-repipe-permit/)How the L&I plumbing permit works for a repipe in Philadelphia: when one is needed, who can apply, what the EZ permit covers, the published fee lines and surcharges, and what happens at inspection.
- Decision Guide [What Causes Pinhole Leaks in Copper Pipe, and Should You Repair or Repipe?](https://philadelphiafreedomrepipe.com/guide/copper-pinhole-leaks/)Why copper water pipe develops pinholes, what Philadelphia's water does and does not explain, how to read the pattern of leaks, and how to decide between a spot repair, a partial repipe and a whole-house repipe.
- Learn [Who Can Do Plumbing Work in a Philadelphia House?](https://philadelphiafreedomrepipe.com/guide/who-can-do-plumbing-work-philadelphia/)Who is allowed to do plumbing work in Philadelphia: what a master plumber license takes, where journeymen fit, why a home improvement registration is not a plumbing license, what a homeowner can do, and how the suburbs handle it.

## 

1. First call You describe the house: rowhouse, twin or detached, how many floors and bathrooms, what the pipe looks like where you can see it, and what made you call. That sets up the walk-through.
2. Assessment The walk-through starts at the meter and main shutoff, traces the pipe up every floor, checks pressure and flow, and maps the routes and the openings. You get a written scope that says what is replaced and what stays.
3. The work A licensed master plumber pulls the L&I permit. New lines go in while the old ones keep the house running, then each section is cut over during a planned water-off window.
4. Completion The new piping is pressure tested and inspected, then flushed. Shutoffs are labeled, openings are closed to the finish the quote names, and you get a list of anything old that stayed in service.

## What this work looks like

New copper water lines on hangers along the ceiling of a shop back room

A stainless steel utility sink with new copper hot and cold supply lines and shutoff valves

A tank water heater in a basement with copper connections and a small expansion tank

Copper branch lines with brass valves and a tag along the wall of a building basement

## Commercial repiping questions

### Is PEX allowed in a Philadelphia store, office or restaurant?

No. Philadelphia's code section P-605.4 requires metallic piping for any water supply piping that serves or sits within an occupancy other than a one- or two-family dwelling or an apartment. A store, office or restaurant falls in that group, so its supply piping is copper or another metallic pipe the code lists.

### What does L&I charge for a plumbing permit on a commercial repipe?

L&I's fee summary lists alterations in other occupancies at $189 for the first 7 fixtures and $22.50 for each one after, against $50 for a one- or two-family dwelling. Repair or replacement of a water line, waste line or stack is $126 each in other occupancies. A $100 filing fee, applied toward the final fee, and small surcharges are added.

### Can a commercial repipe be done while the business is closed?

Often, yes. Most of the work can be planned for closed hours, evenings or days the business does not open, with the water-off cutovers placed in those windows. Inspections still run on the City's schedule, and after-hours work can change the price, so the quote should say which hours are planned and what that adds.

### Does the apartment over a corner store need metallic pipe too?

The pipe that serves or runs through the store does. Philadelphia's material rule allows nonmetallic pipe in apartments, so the apartment's own branches may be PEX, but a line that crosses the store ceiling to reach the apartment sits within the commercial space. Approved L&I scopes for such buildings state that all supply piping for the commercial space is metallic. Confirm the plan with L&I.

### Why are press fittings used on commercial copper repipes?

Press fittings join copper with a crimping tool instead of a torch, so there is no open flame near shelving, ceilings or stock, and joints go faster in a tight window. Philadelphia allows press-connect joints above ground only. Soldered copper is also fine; the choice depends on access, the space and the schedule.

## Related services

### Copper repiping

Rigid copper supply lines for mixed-use buildings and other occupancies where Philadelphia requires metal, and for houses whose owners choose it, joined by press or solder with care around old framing.

### Multi-unit repiping

Supply risers and the branches into each apartment replaced one stack at a time, with water-off windows planned around the people living there and the material the code allows for the building.

### Whole-house repiping

Every hot and cold supply line from the main shutoff to the fixtures, replaced in the material the Philadelphia code allows for the building and pressure tested before the walls close.