Home Additions & ADU Builder Florida

More Room. More Possibilities. More Home.

At Down East Contracting, Additions R Us isn't just a slogan—it's our specialty. Down East Contracting is a trusted home addition contractor specializing in high-quality residential additions throughout Florida's Treasure Coast. Whether you're planning a master suite addition, garage addition, in-law suite, second-story addition, or a complete Accessory Dwelling Unit (ADU), our experienced team manages every phase of the project—from design and permitting to construction and final finishes.

As a full-service design-build contractor, we simplify the building process by providing expert planning, transparent communication, and exceptional craftsmanship. Our goal is to create seamless additions that blend perfectly with your existing home while increasing property value and functionality.

Interior view of a house under construction, showcasing wooden framing, exposed ceiling beams, and unfinished walls. Construction materials and tools are visible.

Attached Home Additions

Need more room without moving? Our custom attached additions are designed to integrate perfectly with your existing home.

  • Family Room Additions

  • Master Suite Additions

  • Second Story Additions

  • Home Office Additions

  • In-Law Suites

Interior view of a house under construction with exposed wooden framing, large windows, and skylights, showing the roof and wall structures.

Detached Additions

Create additional living and recreational space while maintaining privacy and flexibility.

  • Detached Living Quarters

  • Home Offices

  • Studio Spaces

  • Hobby Workshops

  • Recreation Buildings

A view from inside a bedroom looking out a window showing green bushes and a clear blue sky.

Pool Houses

Transform your backyard into a luxury retreat with a custom-designed pool house.

  • Entertaining Spaces

  • Outdoor Kitchens

  • Changing Rooms

  • Bathrooms

  • Storage Areas

  • Covered Patios

A tropical house with a thatched roof, surrounded by lush green and flowering plants, with a swimming pool in the foreground and a clear blue sky overhead.

Garages & Accessory Structures

From practical storage solutions to custom-designed specialty buildings, we construct structures that enhance your property.

  • Detached Garages

  • Multi-Car Garages

  • Storage Buildings

  • Workshops

  • Barns

  • Custom Accessory Structures

Accessory Dwelling Units (ADUs)

Generate rental income, accommodate family members, or add flexible living space with a professionally built ADU.

  • Detached ADUs

  • Backyard Cottages

  • Guest Homes

  • Rental Units

  • Multi-Generational Living Spaces

Down East Contracting, licensed General Contractor, located in Jensen Beach Florida serving the Treasure Coast and Palm Beach County

Florida Home Additions Built the Right Way

  • Every great addition starts with a conversation. We'll meet with you to discuss your goals, lifestyle needs, budget, and vision for the project. During this phase, we evaluate your property, review potential options, and provide expert guidance to help determine the best approach for your addition or accessory structure.

  • Once we understand your vision, our team works with you to develop a customized design that complements your home's architecture and maximizes your available space. We carefully consider functionality, aesthetics, structural requirements, and budget to create a plan that fits both your property and your lifestyle.

  • Construction projects require careful coordination before breaking ground. We handle the permitting process, assist with required documentation, and coordinate with local building departments to help keep your project moving smoothly. We also finalize schedules, order materials, and prepare the site for construction.

  • This is where your vision becomes reality. Our experienced craftsmen and trusted trade partners work diligently to deliver exceptional results while maintaining a clean, organized, and safe job site. Throughout construction, we keep you informed of progress and ensure every phase meets our quality standards.

  • Before we consider the project complete, we conduct a detailed walkthrough with you to ensure every aspect of the addition meets your expectations. We review finishes, functionality, and workmanship, address any final details, and make sure you're completely satisfied with your new space. Our goal is simple: deliver an addition that looks like it was always meant to be part of your home.

During the Construction Phase

Once your permits are approved and construction is ready to begin, Down East Contracting manages every phase of the build from start to finish. As a full-service home addition contractor and design-build contractor, we coordinate every trade to ensure your custom home addition is built efficiently, safely, and in full compliance with the Florida Building Code. Every addition is completed using code-compliant and hurricane-resistant construction practices designed for Florida homes

  • Foundation Construction – Site preparation, excavation, footings, reinforcement, and engineered concrete foundations designed to support your floor plan expansion and meet structural engineering requirements.

  • Framing & Roofing – Precision framing, structural tie-ins, roof framing, sheathing, and roofing systems that integrate seamlessly with your existing home while maintaining structural integrity and curb appeal.

  • Exterior Construction – Installation of stucco, siding, fascia, soffits, hurricane-impact windows and doors, exterior trim, weatherproofing, and durable exterior finishes built for Florida's climate.

  • Mechanical Systems – Professional installation of electrical, plumbing, HVAC, ventilation, and other critical building systems before inspections and interior finishes begin.

  • Interior Finishes – Complete drywall installation and finishing, insulation, flooring, interior painting, trim and molding, cabinetry, lighting, plumbing fixtures, HVAC finish work, and premium interior finishes that make your new living space move-in ready.

Areas We Serve

We proudly provide custom home additions throughout:

  • Jensen Beach

  • Palm City

  • Stuart

  • Hobe Sound

  • Jupiter

  • Jupiter Farms

  • Palm Beach

  • Port St. Lucie

  • Fort Pierce

  • Vero Beach

Let’s Work Together

If you're interested in working with us, complete the form with a few details about your project. We'll review your message and get back to you within 48 hours.

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