New Construction Plumbing in Central Maryland
From Underground to Trim Out, No We Handle Every Phase
Building a new home, adding an addition, or putting up a commercial building? Every new structure needs a plumber who understands the full scope: underground plumbing, rough-in, top out, and trim out. Bailey Bros. works with homeowners, builders, and general contractors across Harford County, Baltimore County, Anne Arundel County, Howard County, and Baltimore City.
What We Fix, Install, and Build
From emergency calls to full installations, here’s how we help.
Emergency
Plumbing
Burst pipes, gas leaks, sewer backups, and flooding — 24/7, including nights, weekends, and holidays. We dispatch fast and fix it right.
Drain & Sewer
Clogged drains, sewer line repair and replacement, camera inspections, hydro jetting, and underslab plumbing. We clear the blockage and fix the cause.
Water Heaters
Tank and tankless water heater repair, replacement, and new installation. We work with all major brands and offer same-day service on most repairs.
Water Quality
Whole-house water filtration, water softeners, well pump repair and replacement, and water testing. Clean water for your family starts here.
Commercial
Plumbing
Grease trap cleaning and installation, backflow prevention and annual testing, hydro jetting, and scheduled maintenance plans for restaurants, offices, and property managers.
Water & Mold Remediation
Full-service water damage restoration and mold remediation — demo, structural dryout, air scrubbing, and rebuild. One company from leak to finish.
Emergency
Plumbing
Burst pipes, gas leaks, sewer backups, and flooding — 24/7, including nights, weekends, and holidays. We dispatch fast and fix it right.
Drain & Sewer
Clogged drains, sewer line repair and replacement, camera inspections, hydro jetting, and underslab plumbing. We clear the blockage and fix the cause.
Water Heaters
Tank and tankless water heater repair, replacement, and new installation. We work with all major brands and offer same-day service on most repairs.
Water Quality
Whole-house water filtration, water softeners, well pump repair and replacement, and water testing. Clean water for your family starts here.
Commercial
Plumbing
Grease trap cleaning and installation, backflow prevention and annual testing, hydro jetting, and scheduled maintenance plans for restaurants, offices, and property managers.
Water & Mold Remediation
Full-service water damage restoration and mold remediation — demo, structural dryout, air scrubbing, and rebuild. One company from leak to finish.
Not sure which service you need?
- hOW CAN WE HELP?
A Plumber Who Understands the Build Process
New construction plumbing is not the same as service plumbing. It requires reading blueprints, coordinating with other trades, meeting inspection timelines, and knowing how to install systems that will pass code the first time. A missed inspection or a failed pressure test can hold up an entire project. The plumber you choose for new construction needs to keep up with the build schedule, not slow it down.
Bailey Bros. Plumbing & Drain Services handles new construction plumbing for residential and commercial projects across Central Maryland. We work directly with homeowners building custom homes, general contractors managing multi-phase builds, and developers putting up commercial buildings. Our scope covers every phase of the plumbing timeline, from underground sewer and water taps through final fixture installation and inspection.
In Maryland, all plumbing work must be performed by a licensed plumber, and new construction plumbing requires permits and inspections at multiple phases. Performing plumbing work without a license carries fines up to $5,000 per violation. We handle the plumbing permits, schedule the inspections, and make sure the work passes on the first walk-through. Maryland License #74826.
Our team is led by a Master Plumber and Master Gas Fitter with 28 years of experience in both residential and commercial new construction plumbing. Every job is backed by a 1-year labor warranty. Financing is available through Wisetack for homeowner-direct projects.
Why Choose Bailey Bros.
24/7 Emergency Response
We pick up. We dispatch. Day, night, weekends, holidays. No exceptions.
3,000+ Projects Completed
Two decades of work in Harford County homes and businesses. We've seen it and fixed it.
Master-Level Credentials
MD Master Plumber · Master Gas Fitter · Backflow Certified. This isn't a crew — it's a qualified team.
1-Year Labor Warranty
Every job we do is backed by a full one-year labor warranty. If something isn't right, we make it right.
When You Need a New Construction Plumber
A new home needs a complete plumbing system designed from scratch: water service line, sewer connection, supply and drain rough-in for every kitchen, bathroom, and laundry room, plus water heater, hose bibs, and gas lines. We handle the plumbing for your new house from the ground up.
A room addition, a second story, or a new wing needs plumbing tied into your existing system. We extend supply and drain lines, rough-in new fixtures, and make sure the additional load doesn't overwhelm your current infrastructure. If the addition includes a bathroom or kitchen, that's full plumbing for an additional scope.
If you're a builder or GC managing a residential or commercial project and need a plumber for general contractor coordination, we show up on schedule, meet inspection windows, and don't hold up the next trade. We've worked with contractors across the I-95 corridor for years.
Restaurants, office buildings, retail spaces, and medical facilities all have specific plumbing requirements. Commercial new construction plumbing includes larger pipe sizing, grease traps, backflow preventers, multiple restrooms, and commercial water heater systems. We handle it.
If your plumber dropped off the job, missed inspections, or isn't keeping up with the build timeline, we can step in. We assess where the project stands, pick up where they left off, and get the plumbing back on schedule.
Before anything gets built, the lot needs connections to municipal water and sewer. We coordinate the sewer tap and water tap with local utilities, handle the underground plumbing, and get the connections inspected and approved.
New Construction Plumbing Phases
Underground Plumbing
The first phase. This includes the sewer line from the building to the public main (or septic), the water service line from the meter to the building, and any underground drain lines beneath the slab or crawl space. Underground plumbing for new construction is installed before the foundation is poured and must pass inspection before the build continues.
Rough-In Plumbing
The second phase. Rough-in plumbing includes all supply lines, drain lines, and vent stacks installed inside the walls and floors before drywall goes up. This is where every fixture location is set: toilets, sinks, showers, tubs, dishwasher, water heater, laundry, and hose bibs. Rough-in must pass a plumbing inspection before the walls can be closed.
Top Out Plumbing
Top out plumbing connects the vent stacks through the roof and completes any above-ceiling work. This phase ties together the rough-in system and prepares it for the final inspection before trim out begins. In some jurisdictions, top out is inspected separately from rough-in.
Trim Out Plumbing
The final phase. Trim out is when all visible fixtures are installed: faucets, toilets, shower heads, garbage disposals, dishwasher connections, water heater hookup, and outdoor hose bibs. This is the last step before the plumbing system is fully operational and ready for the final inspection.
Why Bailey Bros. for New Construction
We Stay on Schedule
In new construction, the plumber controls the timeline at multiple points. If the underground isn’t done, the slab can’t be poured. If rough-in isn’t done, drywall can’t go up. We understand the build sequence and coordinate with your schedule so the project keeps moving.
We Pass Inspections the First Time
Every phase of new construction plumbing requires a plumbing inspection before the next trade can proceed. A failed inspection delays the entire project. We know Maryland plumbing code, we prepare for inspections properly, and we pass the first time.
Master Plumber and Master Gas Fitter on Staff
New builds often need both water and gas systems. Our team includes a licensed Master Plumber and Master Gas Fitter, so we handle water supply, drain and sewer, and gas line piping under one scope. No need for a separate gas contractor.
We Handle Permits and Coordination
We pull the plumbing permits, schedule the inspections with the local authority having jurisdiction, and coordinate with the utility companies for sewer and water taps. You don’t have to chase paperwork. We handle it.
Residential and Commercial Experience
We’ve completed new construction plumbing for custom homes, home additions, multi-unit residential projects, and commercial buildings across Central Maryland. Whether it’s a single-family home in Bel Air or a restaurant build-out in Baltimore, we have the experience to handle it.
What New Construction Plumbing Includes
A complete new construction plumbing scope covers every component of the building’s water, drain, sewer, and gas systems from the ground up. Here’s what a typical residential new build includes.
The project starts with a plan review. We review the architectural and mechanical drawings, verify fixture locations, size the supply and drain systems, and identify any gas line requirements. Once the scope is set, we pull the plumbing permit and begin work.
Underground work comes first: sewer line to the main or septic, water service line from the meter, and any under-slab drains. After the slab is poured and framing begins, we move to rough-in: supply lines, drain lines, and vent stacks for every fixture in the building. Gas lines for water heaters, furnaces, ranges, dryers, fireplaces, and generators are run during this phase. After rough-in passes inspection and drywall is hung, we return for trim out: installing all visible fixtures, connecting appliances, and completing the final inspection.
For commercial projects, additional scope may include grease trap installation, backflow prevention, commercial water heater systems, and multi-restroom rough-ins. We size and install commercial systems to meet the building’s intended use and local code requirements.
Hear It From Your Neighbors
Very Professional and gets the job done! Bailey Bros was recommended to me by a friend who is a general contractor. They came and were very transparent with everything that needed to be done. They were professional and courteous as they explained everything before and during the process. They had to dig a very deep trench to access my sewer line and they returned the following days to finish, re-seed and straw my yard. Thank you! I have peace-of-mind knowing the task was done right.
I was having problems with my toilet and was looking for a plumber. I called Bailey Bros. and spoke with Ray on the first call. He came to my home and fixed the issue. He was very professional and easy to deal with from the first conversation I had with him. He was great! I will only call Bailey Brothers for any plumbing issues I have in the future.
Had these guys install a hot water heater for me. I bought the heater and they were gracious enough to install it. They were friendly, responsive and the least expensive after a comprehensive search. Significantly less expensive. They were thorough and explained everything. Shawn (my tech) was charming. Someone you’d be happy to go out and have a drink with. They have a 5 star rating. They ran a little late, but for the savings and quality of work, it was well worth it. The basement was a little cleaner after their work than before they arrived. I highly recommend them.
Thank you Shawn and Mike! My water heater busted on a Saturday and they were able to install a new one within a few days! 🥰 you guys are awesome! It’s so much better than the old one from 1999! 🫠
New Construction Plumbing Questions
How much does new construction plumbing cost?
Cost depends on the size of the building, the number of fixtures, whether gas lines are included, and the complexity of the sewer and water connections. We provide a detailed estimate after reviewing the plans. Financing is available through Wisetack for homeowner-direct projects.
How long does new construction plumbing take?
The plumbing timeline for new construction spans the entire build. Underground takes 1 to 3 days. Rough-in takes 2 to 5 days depending on the size. Trimming takes 1 to 2 days. The time between phases depends on the build schedule and inspection availability.
Do you work with general contractors?
Yes. We work with GCs, builders, and developers on residential and commercial projects. We coordinate our schedule with the build timeline and communicate directly with the project manager. We’re a plumber for general contractor teams who need reliable trade partners.
Do you pull the plumbing permits?
Yes. We handle all plumbing permits and schedule inspections with the local authority. In Maryland, plumbing permits are required for new construction, and inspections are required at multiple phases. We manage the entire process.
Can you handle both water and gas for a new build?
Yes. Our Master Gas Fitter handles all gas piping alongside the water and drain systems. Water supply, sewer, drain, vent, and gas are all under one scope. No need for a separate gas contractor.
Do you handle additions and partial new construction?
Yes. Home additions, second-story additions, garage conversions, and new wings all require plumbing tied into the existing system. We handle the extension, rough-in, and trim out for any additional scope.
What areas do you serve for new construction?
We serve Harford County, Baltimore County, Baltimore City, Anne Arundel County, and Howard County. We work on projects from Aberdeen to Laurel along the I-95 corridor, and from Annapolis to Towson across the Greater Baltimore area.
What's the difference between rough-in and trim out?
Rough-in is everything behind the walls: supply lines, drain lines, vent stacks, and gas piping installed before drywall. Trim out is the final phase, when all visible fixtures are installed: faucets, toilets, shower heads, disposals, and appliance connections. This happens after drywall is up and the walls are finished.
Where We Work
Bailey Bros. Plumbing & Drain Services is based at 2714 Pulaski Hwy #4, Edgewood, MD 21040. We’re a service-area business, meaning we come to you. Our Edgewood location puts us in the center of the I-95 corridor, giving us fast access to communities across five counties.
We serve Harford County, Baltimore County, Baltimore City, Anne Arundel County, and Howard County, from Bel Air and Aberdeen to Towson, Baltimore, Annapolis, Columbia, and communities throughout the I-95 corridor. See all service areas
- Harford County
- Baltimore County
- ANNE ARUNDEL COUNTY
- Baltimore City
- HOWARD COUNTY
- BONUS I-95 CORRIDOR
