Does your home need more space to fit your current lifestyle? Instead of selling and relocating, you can expand your existing home with a thoughtfully designed and expertly crafted Cape Cod home addition. McPhee Associates is an award-winning home addition contractor serving Cape Cod. Our in-house architectural designers, interior selections team, and field supervisors work together to create seamless, functional additions that elevate the way you live.
If you are considering a home addition on Cape Cod, here are a few key factors to keep in mind. For an in-depth look at timelines, costs, and permitting, see our online guide.
Explore Our Cape Cod Home Addition Projects
As a full-service design-build company, we manage every phase of the addition, from concept and design to construction and finishing details. Below are several recent home addition projects on Cape Cod that showcase our craftsmanship and integrated approach.
Channelside Charmer | Harwich Port
This Harwich Port addition and renovation was designed to capture harbor views and expand space for family gatherings. A 235-square-foot first-floor addition created room for a mudroom, pantry, and great room. Upstairs, an 1,840-square-foot expansion added a new living room with a balcony, custom boat bar, office, and bedroom. A new porch and strategically placed windows maximize natural light and coastal views.
Bay Breeze Oasis | Dennis
This 1960s Cape Cod cottage was transformed into a contemporary year-round home with a large kitchen addition, enhanced ceiling height, and a reimagined floor plan. Removing a central fireplace opened the living space, and combining bedrooms allowed for a spacious primary suite with a Nantucket dormer. Outdoors, the home now features a built-in pool and a 200-square-foot cabana, ideal for entertaining.
Classic Cape Reimagined | East Orleans
A new addition expanded this 1950s Cape, improving both flow and functionality. The project introduced a vaulted kitchen, mudroom, powder room, and two-bay garage with finished space above. A private, year-round in-law suite, connected through the mudroom, features a vaulted living room, wet bar, bedroom, and full bath. Classic shingles and antique slate roofing allow the addition to blend seamlessly with the original structure.
Historic Chatham | Chatham
This 1850s half Cape was updated for modern living while respecting its historic details. The kitchen expansion added a wet bar, breakfast nook, and half bath with laundry and direct access to the deck and outdoor shower. Removing a second-floor bedroom enabled the creation of a spacious primary suite and allowed for an upgraded guest house within zoning constraints.
Classic Ranch | East Dennis
A modest addition enhanced this 1960s ranch without altering its charming profile. Expanding the primary bedroom allowed for a vaulted ceiling, added storage, and a spacious en-suite bath. Opening the kitchen, dining, and living areas improved circulation, while a 12-foot sliding door now connects the interior to a larger deck and patio, perfect for Cape Cod summer living.
Planning Your Cape Cod Home Addition
Building a home addition requires thoughtful coordination of design, zoning, and construction. As a seasoned home addition contractor, we guide you through each step.
Design & Integration
A successful addition should complement your home’s existing architecture, rooflines, materials, and interior flow. Whether you are expanding a kitchen, creating a primary suite, adding a garage, or building an accessory dwelling unit (ADU), our design-build firm ensures seamless integration.
Zoning & Permitting
Cape Cod’s zoning regulations include considerations such as lot coverage, conservation guidelines, height limits, and FEMA floodplain rules. Working with an experienced home addition contractor helps streamline approvals and avoid costly delays.
Structural Work & Site Preparation
From excavation and foundations to framing and roofing tie-ins, structural integrity is the backbone of any addition. Gable extensions, dormers, and reconfigured rooflines can dramatically improve both space and curb appeal.
Functionality & Storage
Every addition should enhance daily living. Consider circulation, natural light, storage, outdoor access, and multigenerational needs. Features such as vaulted ceilings, built-in cabinetry, and expanded entryways can significantly increase usability and value.
Frequently Asked Questions
Costs vary depending on the size of the addition, foundation requirements, finishes, and structural considerations. On Cape Cod, zoning requirements, coastal regulations, and specialized craftsmanship can also influence the overall investment. To ensure transparency, we provide a detailed budget during the design phase.
Yes. All Cape Cod additions require zoning review and building permits. If your home is in a historic district, flood zone, or conservation area, additional approvals may be required. Our team manages the entire permitting process for you.
Absolutely. Our design-build team ensures the new addition blends seamlessly with your home’s architecture, including rooflines, materials, windows, and interior finishes, so the expanded space feels original to the property.
Primary suites, kitchen expansions, ADUs, and garage additions with finished space above typically offer strong long-term value. These additions enhance both functionality and resale appeal.
Yes. We frequently design and construct ADUs and in-law suites that support multigenerational living, guest accommodations, or flexible long-term needs.
Some disruption is inevitable, but we take measures to minimize impact. This includes dust control, clear communication, consistent scheduling, and maintaining safe, organized work areas.
A design-build firm unifies design, budgeting, and construction under one team, reducing delays, miscommunication, and unexpected costs. It is the most streamlined approach for complex addition work.
About McPhee Associates | Cape Cod Home Addition Contractor
McPhee Associates has built Cape Cod home additions since 1972, designing and building expanded living spaces that blend seamlessly with the existing home. Our collaborative approach ensures that each addition enhances comfort, improves function, and reflects your style and lifestyle needs.
As a comprehensive design-build firm, we also offer custom homes, renovations, architectural design, property management, and real estate services. With all services under one team, homeowners benefit from a cohesive, streamlined experience from planning through completion.
Areas We Serve on Cape Cod
McPhee is based in East Dennis, in the Mid-Cape region of Cape Cod. We serve all of Barnstable County, including Provincetown, Truro, Wellfleet, Eastham, Orleans, Harwich, Chatham, Brewster, Dennis, Yarmouth, Barnstable, Sandwich, Mashpee, Falmouth, and Bourne.
Build Your Dream Addition
If you are ready to expand your home with expert craftsmanship and thoughtful design, McPhee Associates is here to help. Contact our team to begin planning your Cape Cod home addition today.
Resources
The Essential Guide to Cape Cod Home Additions
Are you looking to how to expand a Cape Cod house? Learn the latest ideas on how to plan, design, and build Cape Cod home additions.
Remodel vs. Rebuild: Which is Better for Your Home?
Remodel vs. rebuild? Discover the right choice for your home improvement project. Compare the pros and cons of making an informed decision.
Cape Cod Real Estate Fixer-Upper
Everything you need to know about buying, financing, and renovating Cape Cod real estate fixer-upper homes.
Timeless Home Remodeling Ideas for Luxury Living
Check out these timeless home remodeling ideas for luxury living. We hope these design solutions inspire your next project.