Home addition built by AllTrades Contracting Group with matching siding and a new gable roof
Penn Township · 15636

Additions & ADUsin Harrison City, PA

The house was right when you bought it. Now a parent may need to move closer, the kids have outgrown the family room, or the stairs are starting to matter. Our carpenters measure the lot against Penn Township's yard rules, then build the room the family needs onto the house you already have.

Harrison City Additions

Houses that fit once,families that kept growing.

Seventy percent of the 15636's homes date from the eighties, nineties and 2000s, and four in five stand alone on a lot of their own. Owners who bought them young are now planning for parents, teenagers and their own later years.

  1. A first-floor suite for later

    About half the homeowners in the 15636 are between 45 and 64. In a house where all the bedrooms are upstairs, many start asking about a bedroom, bath and closet on the main floor while they're still years from needing it.

    How we build it

    We add the suite off a quiet side of the house with a curbless shower, wide doorways and a short, level path from the kitchen. Blocking goes in the bathroom walls now, so grab bars can be mounted later without opening tile.

    Primary suite additions
  2. Room for a parent, close by

    Close to 30% of households in the 15636 count someone 65 or up. Bringing a parent home often means a bedroom, bath and small living room of their own, with a door they can close and the family a few steps away.

    How we build it

    A suite built into the house's own plan, joined by a hall or shared entry, with a step-free bath and space for a chair and a TV. We go over any kitchenette with the township before design, since that's where zoning questions start.

    In-law suites
  3. A family room off the kitchen

    More than one 15636 home in three has four bedrooms, and nearly 30% of households have kids, and a family room sized for a smaller household can feel tight. Owners want a bigger room where everyone can be together after dinner.

    How we build it

    We push out the back wall beside the kitchen, carry the floor level straight through, and match the roof pitch and siding outside. A wide opening joins the rooms, with a beam sized to take the load the old wall carried.

    Room additions
  4. A garage with a room above

    Some Harrison City families run out of garage before they run out of yard: two cars, bikes, a mower and the holiday bins. Some ask for a bonus room or office over a new garage while the framing is up.

    How we build it

    An attached garage is designed with the house's yard setbacks in mind; a detached one has its own, at least 10 feet from side and rear lines. The floor above is framed for living space, insulated over the bay and reached by a full stair.

    Garage builds
  5. A sunroom on the back

    Owners with a deep back yard and a deck that gets used three months a year ask for a room with glass on three sides that works in March and November too, not a porch that sits closed for the winter.

    How we build it

    We set footings below frost on ground that's often clay here, frame insulated walls and a real roof, and run heat in from the house. Windows are flashed into the walls, and the grade outside is shaped to carry spring water away.

    Sunrooms
  6. Building up when the yard won't

    On a quarter-acre lot in Penn Township's denser residential district, the required side and rear yards may not leave space for a wing. Owners there ask whether the house can take a second floor over a garage or a one-story wing.

    How we build it

    An engineer checks whether the walls and footings below can carry a new floor. If they can, we frame it, roof it for a western Pennsylvania winter's snow, and tie the new siding and trim into the old so the house reads as one.

    Second-story additions

Homes and households: ACS 2020–2024 (U.S. Census Bureau) for the 15636, rounded. Yard rules: Penn Township Zoning Ordinance, Chapter 190.

The rest of the job

How it runs, what it costs and who builds it are on our main additions & adus page.

Adding On in Penn Township

Permits, yard linesand what counts as a second home.

An addition here is shaped by three things: the township's permit office, the yard and coverage limits for your zoning district, and how the code treats a suite with its own kitchen.

  1. 1 officePermits, zoning and inspections

    One township office

    Penn Township's own permit office handles additions, its staff inspect each stage, and crews can't work overnight. Our Harrison City kitchen remodeling page has the details. Drawings and forms are ours to prepare and submit.

    Penn Township rules, explained
  2. 40 ftRear yard, both home districts

    How close you can build

    Both residential districts keep a 40-foot rear yard. Rural Resource lots need 20 feet at each side and cap coverage at 30%; Mixed Density lots need 15 feet and allow 35%. Bay windows and eaves may reach up to 24 inches into a yard. Your lot's district comes off the map before we sketch.

    Penn Township zoning map (PDF) (opens in a new tab)
  3. CC · ICDistricts that list conversion units

    A suite, not a second unit

    The zoning code calls a separate unit inside a house a conversion apartment and lists it only in the commercial and industrial districts, not the two residential ones. The code treats a unit as one with separate places to sleep, cook and wash, so we design in-law suites into the main house and confirm the kitchen with the zoning officer.

    Penn Township Code (opens in a new tab)

Addition Questions

Harrison City additions,the first five questions.

What owners here ask before we put a shovel in the yard. For the full process, see our additions and ADUs page.

Ask a Question
[ 01 ]What does an addition cost in Harrison City?

Size, foundation and the roof tie-in decide most of the number. A one-room addition on a flat lot is the simpler case; a second story, a suite with its own bath or a hillside foundation adds to it. Your price comes in writing after a visit to the lot.

Addition price ranges
[ 02 ]Can we build a rental apartment onto our house?

In Penn Township's residential districts, probably not as a separate unit: the zoning code lists conversion apartments only in its commercial and industrial districts. A family suite that's part of the house is a different plan. We ask the zoning officer before you pay for drawings.

Penn Township Code (opens in a new tab)
[ 03 ]Is old mining a concern for a new foundation?

It's worth checking. Confirmed mining runs beneath the village on DEP's map, and a regular policy excludes ground that sinks from old workings. Search your address while the plans are still drafts, and weigh the state's separate subsidence policy, which can cover the addition along with the house.

Mined ground near Harrison City
[ 04 ]Our back yard is wet every spring. Can we still build there?

Usually, with the right footings and drainage. Soils around Harrison City hold water high from January to April, and seeps are common on the slopes. We dig test holes, set footing drains, and grade the new corner so water runs past the addition, not into it.

What we check first
[ 05 ]Can we keep living here during the build?

Almost always. Footings, framing and the roof go up outside your walls, and nobody's sawing at night under township rules. The disruptive stretch is opening the old wall into the new room, so we build and close in the addition first and keep that step short.

How an addition comes together

Verified Google Reviews

The word fromhomes and job sites.

5.0 out of 5 · 17 reviews

Written by the homeowners we've worked for across Westmoreland County. Every one verified on Google, every one pulled from the real feed.

“I couldn't recommend the All Trades team more! They did a wonderful job on the drywall and tile for a bedroom and bathroom remodel. They were responded to me quickly, were kind and easy to work with, efficient and attentive to detail. They checked in along the way to make sure we were on the same page about the project. I couldn't be happier with how it turned out!”

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Jenna Gorsich

Sep 2026

“I would highly recommend AllTrades Contracting Group. They were easy to work with. Very reliable and dependable! Brison and Vinny were very detail oriented! I am so pleased with my new bathroom!!! I will definitely be calling them again in the near future for other projects!! Thank you!!”

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Gina Krejdovsky

Aug 2026

“James and Brison did an excellent job on a small repair for me. They got me scheduled with very short notice, were very professional and prompt. The repair I needed looks great. I appreciate they still put so much care into a small job and my house is all the better for it. 10/10 would definitely hire again.”

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C. K.

Jul 2026

“What a fantastic experience from start to finish! From the initial quote to the completed project, everything exceeded my expectations. The team was professional, communicative, and provided valuable input and recommendations throughout the entire process. Their attention to detail and commitment to quality truly stood out. I highly recommend this business to anyone looking for reliable, high-quality contracting services!”

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Andora Weglein

Jul 2026

“My wife and I have been kicking around the idea to get our master bathroom remodeled for the last couple of years but never pulled the trigger. While getting a roof repair done due to some windstorms, I asked the gentleman for some bathroom remodel references and he gave me AllTrades contact info. I met with James and he was really good about understanding what we wanted to do. He allowed us to feel comfortable and confident in his teams ability to get us what we wanted. Once we agreed on the quotes (very detailed and broken down) the work started within days. This was a full gut and remodel which involved moving some plumbing and closing up a window and cutting in a new one on a different wall. The two gentleman doing the job were fantastic. Super nice and cordial to my whole family. Brison and Vinny, thank you for making my family feel safe while you were transforming our bathroom into a much more functional and beautiful space! This group does all kinds of work as isn't limited to just bathrooms. I recommend you at least speak to them and get some quotes for any work you are looking to get done.”

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Justin

Jun 2026

“I've had the pleasure of working with James for half a decade now. He's a professional, timely, down to earth, and his attention to detail is unmatched.”

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Western Nights

Apr 2026

“I couldn't be more impressed with the work they have done. The quality and attention to detail is outstanding, and everything was completed with true craftsmanship and care. The team was professional, efficient, and clearly takes pride in what they do. The final result exceeded expectations, and it completely transformed the space. Highly recommend to anyone looking for top-notch remodeling work. You will be in great hands!”

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Ethan Kisan

Mar 2026

“James and his team are amazing!”

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Thor Chandler

Mar 2026

“Excellent office build out work on all accounts! From commercial spaces to residential work this group is professional, fast and affordable. Give them a shot!”

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Max Kisan

Mar 2026

“Dependable work at a great price. I would highly recommend giving these guys a call.”

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Genre Baker

Mar 2026

“James, Brison and their team are exceptional. From start to finish you won't find someone as good as these guys. Attention to detail and their quality of work speaks volumes about these guys characters. 10 stars.”

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Jared G

Mar 2026

“These guys do fantastic work!!”

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Autumn Hodgkiss

Mar 2026

“James and Brison are the best! I've been working with them for 2 years, and it's been nothing but a great experience! I'm so excited to continue following them on this new business venture. These guys really know what they're doing and have a passion for what they do. Guaranteed high quality work from the best in the business!”

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Victoria Breeding

Mar 2026

“I've had the pleasure working with James and Brison in the past! I have nothing but good things to say about them work ethic, customer service, and craftsmanship! 10/10”

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Cody Smith

Mar 2026

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