Second floor additions and rear additions are our specialty. Over 300 residential additions completed across Chicagoland — full-scale home expansions, not just single room tack-ons.
Adding a second floor is one of the largest residential projects a homeowner can undertake — and the plumbing is one of the most complex pieces. New bathrooms, laundry, kitchenettes, and full master suites all require DWV stack extensions, new supply runs, and careful coordination with the structural work below.
We have done this over and over again across Chicagoland. We know how to sequence the rough-in with framing, how to tie into your existing stacks correctly, and how to get inspections passed on schedule so the project keeps moving.
Rear additions — expanding the back of the home for a new kitchen, family room with a full bath, or an expanded master suite — are where we earn our reputation. These projects require tying into the existing system at multiple points and running new lines through the home with minimal disruption.
We plan every rear addition carefully before we cut a single pipe — mapping the existing system, identifying the cleanest tie-in points, and protecting your finished living spaces in the process.
300+ Additions Completed
Over 300 residential additions across Chicagoland. That is not a single-room tack-on number — that is full-scale second floors, rear additions, and major home expansions across Chicago city and every collar county.
That volume of experience means we have seen every configuration, every challenge, and every code variation across the metro area. We know how additions in Chicago city differ from the suburbs. We know which municipalities require what at inspection. And we know how to tie new plumbing into old systems — cleanly, permanently, and to code.
Before any addition work begins, we assess your existing system — water pressure, drain stack capacity, and the condition of your current plumbing. This prevents surprises mid-project and ensures the addition integrates cleanly with your home.
Residential addition plumbing requires permits in Chicago and every Chicagoland municipality. We pull every permit and schedule every inspection. An un-permitted addition is a serious liability when you sell your home.
Addition Types We Handle
Full second floor additions including new bathrooms, master suites, laundry rooms, and all plumbing rough-in coordinated with framing and structural work.
Rear home expansions for kitchens, family rooms, master suites, and more. Careful tie-in to existing systems with minimal disruption to your finished spaces.
Full bath rough-in within any addition — DWV stack extension, supply lines, and all fixture connections including luxury freestanding tubs and bidets.
Sink relocations, dishwasher connections, pot filler rough-in, and gas line extensions for expanded or added kitchen spaces.
Complete plumbing for in-law suites and accessory dwelling units — bathroom, kitchenette, and laundry with their own permitted rough-in.
Outdoor kitchen rough-in, exterior hose bibs, irrigation connections, and gas line extensions for fire pits, grills, and outdoor heating.
Related Services
Building a new home? We handle complete new construction plumbing from foundation to fixture trim.
Learn More →Freestanding tubs, bidets, steam sauna connections, and full fixture upgrades.
Adding bathrooms or a suite? You may need a larger water heater. We assess and install the right unit.
Learn More →Get a detailed, estimate from Chicago's most thorough plumbing contractor.