Professional Home Extensions That Seamlessly Expand Your Living Space
Your family is growing, but your home doesn't have to feel cramped. A well-planned home extension adds the space you need while increasing your property value — often by far more than the cost of construction. At Mimar Construction, we specialize in designing and building home additions throughout Ridgewood, Montclair, Greenwich, and communities across Northern NJ and CT that look like they were always part of the original home.
With 30 years of residential construction experience, we understand the unique challenges of building additions in established neighborhoods. From navigating zoning requirements and setback restrictions to matching existing rooflines, siding, and interior finishes, our team handles every detail so the transition between old and new is invisible.
Whether you need an extra bedroom, an expanded kitchen, a family room addition, or an entire second story, Mimar Construction manages the entire project from initial design through final walkthrough — on time, on budget, and built to last.
Types of Home Additions We Build
Every home and every family is different, which is why we offer a full range of addition types tailored to your specific needs:
- Single-Story Additions — Ground-level bump-outs and extensions for expanded kitchens, master suites, family rooms, or home offices. These are typically the most cost-effective way to add significant square footage.
- Second-Story Additions — When your lot doesn't allow horizontal expansion, building up is the answer. We add full or partial second stories with proper structural reinforcement, giving you bedrooms, bathrooms, and bonus spaces without sacrificing yard space.
- In-Law Suites & Accessory Dwelling Units — Self-contained living spaces with private entrances, kitchenettes, and bathrooms for aging parents or adult children. We handle all ADU zoning requirements.
- Garage Additions & Conversions — New attached garages, detached garages, or conversions of existing garage space into finished living areas.
- Sunroom & Four-Season Room Additions — Light-filled living spaces that connect your home to the outdoors year-round, with proper insulation and heating for our Northern climate.
Our Home Addition Process
Building an addition is a major investment, and our structured process ensures a smooth experience from start to finish:
- Design Consultation — We visit your home, discuss your needs and vision, review your property's zoning constraints, and begin conceptual design. We work with trusted architects and can manage the design process for you.
- Permits & Engineering — We prepare and submit all required permit applications, structural engineering plans, and zoning documents. We handle the municipal process so you don't have to.
- Foundation & Framing — From excavation and footings to framing and tie-in with your existing structure, we build with precision to ensure structural integrity and seamless integration.
- Mechanical & Finishes — Electrical, plumbing, HVAC extensions, insulation, drywall, trim, flooring, and painting — all coordinated by our experienced project managers.
- Final Walkthrough — We complete a detailed punch list, obtain final inspections, and walk you through your new space to make sure every detail meets your expectations.
Frequently Asked Questions About Home Extensions
Home additions require building permits in every municipality we serve. Depending on the scope and your location, you may also need zoning variances, planning board approval, architectural review board approval, and permits for electrical, plumbing, and mechanical work. In towns like Ridgewood, Short Hills, and Greenwich, there are often specific architectural and historical preservation guidelines as well. Mimar Construction handles the entire permitting process on your behalf, from application preparation to final inspections.
Timeline varies with the size and complexity of the addition. A single-story room addition typically takes 3 to 5 months from permit approval to completion. A second-story addition usually takes 5 to 8 months. The permitting process itself can add 4 to 12 weeks depending on the municipality. We provide a detailed project timeline during the planning phase and keep you updated throughout construction with regular progress reports.
In Northern NJ and CT, home addition costs typically range from $250 to $500+ per square foot depending on the type of space (bathrooms and kitchens cost more than bedrooms), the level of finishes, structural requirements, and site conditions. Second-story additions are generally more expensive per square foot than ground-level additions due to structural reinforcement needs. We provide detailed, transparent estimates so you understand exactly where your investment goes.
This is our top priority. We go to great lengths to match existing rooflines, siding materials, window styles, trim profiles, and interior finishes so the addition looks original to the house. We source matching materials, replicate architectural details, and blend interior flooring and trim seamlessly. Many of our past clients' neighbors can't tell where the original house ends and the addition begins — and that's exactly the result we aim for.
The foundation type depends on the size and purpose of the addition. Full basement foundations are common for larger additions and provide additional storage or living space. Crawl space foundations work well for smaller additions and are less expensive. Slab-on-grade foundations are used for certain ground-level additions. A second-story addition may require reinforcing the existing foundation. Our structural engineers assess your specific situation and recommend the most appropriate and cost-effective foundation solution.
"We added a two-story addition to our 1960s colonial and Mimar made it look like it was built with the original house. The roofline matches perfectly, the siding is seamless, and the interior flows naturally. Our neighbors are amazed. The whole process was professionally managed from start to finish."
Home Extension Service Areas
We build home additions throughout Northern New Jersey and Connecticut, including: