#1 Chicago General Contracting Contractor: Pegasus Construction
Finding the right contractor to build an addition on your Gold Coast, 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 Gold Coast, 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.
Outward additions aren’t how Gold Coast homeowners expand their space — the neighborhood is built vertically. Full-unit renovations, interior reconfigurations, and scope projects that maximize existing square footage are the norm. Pegasus Construction works in Gold Coast condos, co-ops, and greystone units, handling City of Chicago permits and building management coordination for major interior projects.
Major renovation projects in Gold Coast co-ops and condos require City of Chicago permits, building board approval, and compliance with each building's specific renovation rules. We navigate all of this — permit filings, board submissions, contractor insurance requirements — so homeowners don't have to.
Greystone buildings in the Gold Coast have plaster walls, original hardwood, and century-old structural details that require careful handling. We've renovated units in Gold Coast historic buildings and know how to work within their constraints without damaging the fabric of the structure.
Gold Coast homeowners who want to add functional space typically do it by reconfiguring what they already have — combining rooms, converting ancillary spaces, or opening up floor plans that were never designed for contemporary living. We design and build these projects to Gold Coast standards, every time.
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
Many vintage Chicago bungalows, two-flats, and greystones in River North Chicago are built on foundations capable of supporting an upper level, but it requires a structural assessment. Pegasus works with licensed engineers to evaluate your existing framing, foundation, and load paths before committing to a design. We will not promise a second story until we know the structure can handle it.
Often yes. Converting an existing attic with dormers can add significant livable square footage at 30 to 40 percent lower cost than a ground-up addition because the foundation and exterior walls already exist. Pegasus will price both options so you can compare real numbers before deciding.
In River North Chicago, home additions typically run $150 to $250 per square foot for a fully finished, permitted addition including framing, mechanical, electrical, plumbing, and finishes. Complexity and site access affect where you land in that range. You receive a detailed estimate before any contract is signed.
Permit approval through the Chicago Department of Buildings in River North Chicago typically takes four to eight weeks depending on project complexity and current review volume. Pegasus submits complete, code-compliant drawings the first time to avoid back-and-forth that delays the clock. Permit timelines are built into the project schedule from day one.
Matching vintage Chicago bungalows, two-flats, and greystones requires attention to roof pitch, exterior materials, window proportions, and trim profiles. Pegasus sources the same siding species, brick veneer, and roofing materials as your existing home wherever possible so the addition looks like it was always there.
The Chicago Department of Buildings in River North Chicago enforces setback requirements limiting how close structures can be to property lines, and zoning codes cap total lot coverage. Pegasus researches your specific parcel restrictions before design begins so there are no scope surprises after plans are drawn.
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.