#1 Chicago General Contracting Contractor: Pegasus Construction
Finding the right contractor to build an addition on your Forest Glen, Chicago home can be a challenge. It’s important to thoroughly vet and interview your options before deciding who to hire.
To ensure that you find a contractor that meets your needs and budget expectations, download our free 3-Step Guide to Choosing A Remodeling Contractor.
Whether you decide to hire our team at Pegasus Construction or another local remodeler, you can use this helpful guide to be confident knowing you have your bases covered.
A successful home remodel starts with a clear plan. With hundreds of satisfied Forest Glen, Chicago customers, our proven 6-Step Design-Build Process ensures a smooth and stress-free remodeling experience.
1 in 3 remodels exceed their budget—but yours doesn’t have to. At Pegasus Construction, we’ve created a budgeting system to eliminate surprise costs, with our projects averaging just a 5% variance from the initial budget to the final price.
Feel confident knowing your home remodel is managed by experts. Each project is assigned a dedicated team, led by an experienced master carpenter, ensuring timely completion. While other companies face delays of weeks or months, our projects average less than a 2-day difference from the original schedule.
Forest Glen’s housing is mostly large Tudors, Georgians, ranches, and mid-century custom homes on deep, wooded lots on the Far Northwest Side. Many owners add on rather than leave, and that means working within city setbacks and the existing structure.
If you find yourself needing more living space and want to expand your home rather than upsize, a single-level addition is the place to start.
The most cost-effective way to add living space, a single-level addition attaches to the side of the home. They typically require expanding the home’s foundation, and are most often used for expanding kitchens, living rooms, or home offices.
Single-level additions are typically limited by lot size and setback laws. For this reason, these additions are better fit for homes on larger lots.


Want to expand your home without expanding its footprint? Many homeowners don’t realize it’s possible to expand their living space by adding a second story.
Although often more expensive than single-level additions, second-story additions can be a great solution for homeowners who need additional living space but don’t have enough yard space to build out.
Second-story additions tend to be more technically challenging, as they require extensive engineering and planning to ensure that they don’t disrupt the design or aesthetic of the existing structure.
For some homeowners, a basement addition is the best way to expand their living space. This often involves either raising the home or digging out the crawl space.
Homeowners who go this route often use their basement for additional bedrooms, a recreational space, or an Accessory Dwelling Unit (ADU).
Basement additions are among the most expensive methods of adding onto a home. Extensive manual labor, planning, and permitting all contribute to the high cost of basement additions.

At Pegasus Construction our mission is to change the lives of homeowners by helping them expand their homes with custom home additions built just for them. However, we also recognize that not every home addition project is the right fit for our team. Here is how to tell if Pegasus Construction is or isn’t a good fit for your home addition project.
Schedule an advisory call with a Design Consultant
Invite us to your home for an initial evaluation
Align on a budget and meet to discuss the design
Hear that this client had to say!
“…I felt truly heard and valued during our conversation. I came to your company with questions about our projects, and Greg provided thoughtful, flexible scenarios and options to help us achieve our goals. He genuinely seemed to care about me and my family as real people.”
Common Forest Glen additions are primary-suite additions, kitchen and family-room expansions, and second-story or dormer additions on ranches and mid-century homes. On Forest Glen’s deep lots there’s often room to build out as well as up.
Yes, and additions get more review than interior work. Any addition needs a permit and zoning review from the Chicago Department of Buildings at 121 N. LaSalle Street, covering setbacks and lot coverage. We handle the drawings, submission, and inspections.
Forest Glen lots have side-, front-, and rear-yard setbacks plus lot-coverage limits. Before we design anything we pull your lot’s zoning so the addition is something the City will actually approve.
Often yes — adding up is a common way to gain bedrooms and a primary suite. The key is whether the existing foundation and framing can carry the load, so we evaluate the structure before promising a second story and reinforce where needed.
Yes, that’s one of the most common Forest Glen additions. We add a primary bedroom, bath, and closet either over the existing footprint or as a rear addition, designed to match the home and pass Chicago’s review.
Forest Glen additions vary widely — a room addition might start around $110,000, while a large primary-suite or full second-story addition can run $325,000 or more. We give you a fixed, itemized number once the design is set.
Plan on roughly 5 to 10 months from design to finish, including Chicago zoning and permit review. We give you a real schedule up front, not an optimistic guess.
That’s the goal. Forest Glen is full of well-kept Tudors, Georgians, ranches, and mid-century homes, and a good addition should match the masonry, rooflines, and proportions so it reads like original construction.
Choosing the right contractor for your remodel can be simple. Use our free guide to walk you through 3 easy steps to select the perfect contractor.