Custom Home Additions & Garages in Irwin, PA
JP Construction does custom home additions and garages in Irwin and the rest of Westmoreland County. Licensed and insured, with free estimates.
Room additions, second stories, and attached or detached garages, matched to the house that is already there.
Irwin sits right next to our shop. Most of the housing is pre-war to mid-century, which means a lot of our work here is additions, garages, porch rebuilds, and full restorations on older homes. We have been doing custom home additions and garages here since 2015, and the same project manager runs your job from the first site visit to the final inspection.
- Licensed & Insured
- Free Estimates

Custom Home Additions & Garages Built for Irwin Properties
A few things come up again and again on Irwin jobs: older homes on stone or brick foundations that need a look before addition work, and narrow lots that make second-story additions more practical than ground-floor ones. We plan for both before we price the work, and we know what the local building department wants to see on a permit application, which keeps the review from dragging on.
Common challenges we address here
- Older homes on stone or brick foundations that need a look before addition work
- Narrow lots that make second-story additions more practical than ground-floor ones
- Lead paint and asbestos in pre-1978 homes where we tie in
Seasonal Considerations
A lot of Irwin's older homes have little insulation, so when we open a wall for an addition in winter we tent and heat the tie-in to protect the existing house. Spring and fall are the easiest seasons to build here.
Area Context
How We Handle Custom Home Additions & Garages in Irwin
Assess & Design
We assess your existing structure and lot, discuss the scope, and coordinate with a licensed designer on permit-ready drawings.
Permit & Approve
We handle all permit applications and manage any HOA approval requirements before a single shovel hits the ground.
Foundation & Frame
New footings, slab or foundation, and framing are built and integrated with your existing structure while your living space stays protected.
Tie In & Finish
Mechanical systems are connected by licensed subs and finishes are carefully matched to your existing home.
Custom Home Additions & Garages in Irwin: Common Questions
Ask Us AnythingMost custom home additions & garages jobs in Irwin run from $35,000 to $350,000 depending on scope, size, and site conditions. We will come out, look at the property, and give you a written estimate at no charge.
Yes. Irwin is part of our regular service area. We can usually get out for an estimate within the week.
Yes. JP Construction is licensed in Pennsylvania and carries general liability and workers' compensation coverage on every job. We have been working in Westmoreland County since 2015.
Two we see often: older homes on stone or brick foundations that need a look before addition work, and narrow lots that make second-story additions more practical than ground-floor ones. A lot of Irwin's older homes have little insulation, so when we open a wall for an addition in winter we tent and heat the tie-in to protect the existing house. Spring and fall are the easiest seasons to build here. We plan for these before we price the job.
Yes. In addition to Irwin, we serve Westmoreland County, including nearby communities. Contact us to confirm coverage for your specific location.
Irwin Borough issues its own building permits; coordination with Westmoreland County is required for some project types; historic character of some blocks may trigger zoning review. We handle the permit application and the inspections as part of the job.
What Irwin Customers Say
JP Construction built our two-car garage from the ground up and it came out better than we imagined. They pulled all the permits, kept us informed throughout, and finished on schedule. Quality workmanship and zero headaches.
We added a master suite and laundry room to our 1980s colonial. JP Construction matched the roofline and exterior perfectly, and neighbors have asked us if the house was always that size. Their crew was on-site consistently and that level of involvement made all the difference.
Getting permits for our older home was intimidating, but JP Construction navigated the whole process without any delays. The addition came out exactly as designed. Honest pricing, clear communication, real craftsmanship.
Custom Home Additions & Garages in Every Area We Serve
Select your community for pricing and details specific to your area.
Primary Service Area
