Home Additions Experts
Expert Home Additions Services
GS Construction & Remodeling specializes in professional Home Additions. As a father-son team, we bring decades of combined experience to every project.
From the first walkthrough to the last punch-list item, Greg or Patryk runs your Home Additions project themselves. That means a scope written out line by line instead of one number, permits pulled and handled with your village, and the same faces on site rather than a crew you've never met.
- Specialized Home Additions expertise
- On-site supervision for every project
- Transparent pricing with no surprises
- Quality craftsmanship guaranteed
"Your Home Additions project deserves the best—we deliver it."
Neighborhoods & landmarks near our Forest Park home additions
Madison Street dining and shopping district, CTA Blue Line Forest Park terminal, Forest Home Cemetery and the Haymarket Martyrs' Monument, Ferrara Candy Company factory on Harrison Street, Park District of Forest Park Aquatic Center, Forest Park Public Library, Proviso Math and Science Academy, The Altenheim, Des Plaines River
Neighborhoods we work in
- Downtown Forest Park
- The Park
- Circle Avenue
- Harlem Avenue
Home additions in Forest Park, IL
Expanding a home in Forest Park often means working with the distinct architecture of its early 20th-century housing stock. Many bungalows and worker cottages feature compact footprints, making additions a strategic way to gain essential square footage without sacrificing yard space. We frequently add to the rear of these homes, extending kitchens, creating new family rooms, or incorporating much-needed primary suites. For two-flats, adding a third story or expanding a unit horizontally can transform the property's utility and value. The goal is always to integrate seamlessly with the existing structure, respecting the original character while delivering modern functionality and comfort.
What Forest Park homeowners ask for
Forest Park homeowners frequently seek two-story additions to expand upwards on smaller lots, often adding extra bedrooms and a second full bathroom. Primary suite additions, incorporating a larger bedroom, walk-in closet, and spa-like bathroom, are also very common. We also see demand for expanded kitchen-dining areas, pushing out the rear of the house to create open-concept living spaces that better suit contemporary family life.
About Forest Park
Forest Park packs its housing into 2.4 square miles along the Des Plaines River, and the stock is genuinely old: nearly half of the village's homes were built before 1940, with a median build year of 1949.
Queen Annes and frame worker cottages share the oldest blocks with brick two-flats and Chicago-style bungalows, while condo buildings — roughly a quarter of all housing units — line the busier corridors. Families here get District 91 schools, the selective-enrollment Proviso Math and Science Academy, Madison Street's restaurant row, and the CTA Blue Line's western terminal.
The earliest subdivisions with Queen Annes, worker cottages, brick two-flats, and Chicago-style bungalows often present tight lot lines and existing rooflines that require careful design to tie into new additions. Later condo buildings along busier corridors suggest a different approach, where vertical expansion or strategic interior reconfigurations might be more feasible due to shared walls and site constraints. Expanding the footprint of these homes means considering the compact layouts and integrating new spaces that complement the existing foundation and structure. The village's review process for exterior changes will focus on how additions integrate with the established character of these distinct housing styles. Any plumbing-heavy work must also factor in the village's ongoing lead service line replacement program, which could influence tie-ins for new bathrooms or expanded kitchens.
Home additions in Forest Park require comprehensive plan review by the Building Department, covering structural integrity, foundation work, new roofing, and all new plumbing and electrical systems. GS Construction & Remodeling manages the full application process, including architectural plans, and coordinates all required inspections from foundation through final sign-off.
How your Forest Park project runs
ProcessThe same six stages on every job — free in-home estimate through warranty.
Free in-home estimate
Greg or Patryk — the owners, not a salesperson — walk your space, take real measurements, and give you honest feedback on what your budget buys.
Itemized scope & contract
Labor, materials, demolition and disposal priced line by line, not one mystery number. Payment terms and warranty are in the written contract.
Design & selections
Bring your own designer, use our architects and designers, or choose everything yourself. Selections are scheduled ahead so lead times never stall the site.
Permits & scheduling
We pull and manage building, plumbing and electrical permits with your village — typically 1–2 weeks — and hand you a written schedule before demo day.
The build, owner-supervised
Long-standing trade partners working in sequence under daily owner supervision. Your client portal shows the schedule, change orders and current balance.
Walkthrough & warranty
We walk the finished job together, close out every punch-list item, hand over manufacturer paperwork, and your written workmanship warranty starts. Our commitment never expires.
Testimonials
Your Neighbours in Forest Park Love Us
Real reviews from homeowners. Ask us for live phone references.
I cannot say enough good things about GS Constructions / Greg and Patryk Szady. From the start, their proposal and cost estimate was broken down, item by item, which most contractors don't do. It allowed us to alter our project to fit our budget. Patryk also took the time to explain costs to us and help us get what we wanted for the price we could afford. Once we hired GS, they kept to their timeline, and they focused on our project. Each day we knew when to expect workers (who came on time!) and at the end of each day, we could see real progress. The crews that came to do the work were courteous, respectful of our space, and they cleaned up after themselves. Patryk and Greg didn't just show up once or twice; they were there throughout the project, and were alway helpful in answering questions, addressing concerns, and making it feel like my project was their main focus. Most importantly, the finished product was beyond our expectations. Patryk and Greg really pay attention to detail and are willing to go the extra mile to make things perfect. From exact tile or light placement, to thinking about how cabinets will sit near a doorway, to vent color, they thought of and addressed issues I hadn't even considered, and they made it look perfect, even when that meant more work for them. When I picked a paint color I ended up not loving, they offered to repaint even though it was my mistake. When I picked a wall mounted faucet known for being difficult, they spent hours trouble shooting water pressure and placement in order to get it just right. When the project was all done, Patryk and Greg followed up a few weeks later to make sure we were happy, and come back and address small punch list items that we realized only after living in the space again. It is this kind of attention to satisfaction and attention to detail that is rare to find in this industry, and it makes Patryk and Greg an absolute pleasure to work with. I have recommended them to others we have been equally happy. TL;DR: GS Construction was on time and on budget, and their prices are competitive and fair. Their work was absolutely beautiful, and we couldn't be more pleased. After this experience, I honestly would not use anyone else. I will be a returning customer for life.
Before & After & Timelapse
What homeowners near Forest Park say
“I cannot say enough good things about GS Constructions / Greg and Patryk Szady. From the start, their proposal and cost estimate was broken down, item by item, which most contractors don't do. It allowed us to alter our project to fit our b...”
“GS Construction worked on my condo renovation. Patryk had wonderful insight on details that that other potential contractors didn't even think of. They took all surprise issues in stride, and solved them before I even knew about the issues!...”
“You will not regret choosing GS Construction & Remodeling. We are beyond happy with our condo remodel, and it is all thanks to Greg, Patryk, and their team of hardworking and meticulous professionals. We completely remodeled our two bedroom...”
Home Additions stories from the blog
Kitchen Remodel · Barrington, IL
A Bright, Hardworking Kitchen Renovation in Barrington, IL
This kitchen renovation in Barrington, IL, completed in 2021, shows the kind of bright, hardworking space we love to build, centered around a striking gray island.
Sep 4, 2026
Kitchen Remodel · Hoffman Estates, IL
Hoffman Estates Kitchen & Wet Bar: A Bright, Cohesive Renovation
We transformed a kitchen, wet bar, and living room in Hoffman Estates, IL, creating a bright, updated space with white shaker cabinets and granite counters.
Sep 4, 2026
Kitchen Remodel · Palatine, IL
Palatine Kitchen Renovation: Dark Wood, Granite, and a Mosaic Accent
This Palatine kitchen renovation showcases rich dark wood cabinetry, elegant granite countertops, and modern stainless steel appliances.
Sep 4, 2026
Budgeting first? See real 2026 price ranges in our home additions cost guide — and what your Forest Park permit will add in our permit guide.
Completed projects around Forest Park
GS Construction crews have completed 66 projects within 10 miles of Forest Park — part of 429 completed projects across 69 Chicago-area ZIP codes. The map below shows real project density from our records, not a service-area claim.
More Remodeling Services in Forest Park
Contact GS Construction
Let's Build Beautiful Spaces Together
GS Construction is a father-and-son construction company, and home additions in Forest Park is work Greg and Patryk run themselves. Expect clear communication, quality craftsmanship, and a straightforward plan—reach out today to schedule a free in-home consultation and get a detailed estimate and honest feedback.
- Telephone
- (224) 735-4200
- [email protected]
- Service Area
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Service Area
Forest Park and surrounding Chicagoland areas