MA Properties Inc.

13646 Mira Montana Drive, Del Mar, CA 92014
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https://onmaproperties.com/services/adu-construction
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MA Properties Inc. is a Del Mar-based ADU contractor building accessory dwelling units and backyard cottages throughout North County, including Encinitas, Solana Beach, Cardiff-by-the-Sea, and Rancho Santa Fe, from foundation to finished, coastal-ready structures.

MA Properties Inc. – ADU Contractor in Del Mar, CA

About MA Properties Inc.

ADU Construction in Del Mar and North County

MA Properties Inc. is a Del Mar-based contractor that builds accessory dwelling units (ADUs) for homeowners throughout the coastal North County area. As an ADU contractor, the company handles construction from the ground up, covering the foundation, framing, weather-tight shell, and finished exterior of each structure. Projects are carried out with licensed craftsmanship and a focus on clear communication with property owners throughout the build.

For homeowners considering a backyard cottage builder for their property, MA Properties Inc. manages the process so that the new structure fits the existing lot and is built to withstand coastal conditions. The company typically begins with an on-site consultation, and many estimates are informed by 3D scanning of the property before work begins. Services include the construction of new ADUs and backyard guest houses, with owner Gustavo Mello involved during major phases of each project. Written estimates are based on an on-site review rather than flat online pricing. MA Properties Inc. serves Del Mar, Encinitas, Solana Beach, Cardiff-by-the-Sea, and Rancho Santa Fe.

The Building Process

As an ADU builder, MA Properties Inc. follows a consistent sequence of phases on each project, from the initial foundation pour through to final finishes:

  1. Foundation — Site preparation, utility rough-ins, and a level concrete slab designed for coastal conditions.
  2. Framing — Structural walls, roof, and openings laid out to support living space, natural light, and overall flow.
  3. Weather-tight shell — Installation of barrier materials, roofing, windows, and doors so the unit is sealed before interior finishing starts.
  4. Finish and site work — Siding, trim, porch construction, and hardscape work to complete a backyard cottage ready for use.

Because materials, drainage, and detailing require extra attention near the ocean, the company builds with longevity in mind, aiming to hand over a finished unit that can be used for guests, family members, or as a rental.

Frequently Asked Questions

What is an ADU?

An accessory dwelling unit is a secondary living space located on the same property as the main home, often used as a backyard cottage, in-law suite, or rental unit.

How long does an ADU take to build?

Timelines depend on permitting, site conditions, size, and finish selections. Following an on-site consultation, MA Properties Inc. outlines a realistic schedule within a written proposal.

How much does an ADU cost?

Costs vary based on size, finishes, utility connections, and lot conditions. The company does not publish flat online pricing; instead, a written estimate is provided after a property review.

Where does MA Properties Inc. build ADUs?

Projects are completed in Del Mar, Encinitas, Solana Beach, Cardiff-by-the-Sea, and Rancho Santa Fe, with owner Gustavo Mello involved through the major phases of construction.

Services

MA Properties Inc. performs the following services

  • Construction
  • Feasibility & Site Assessment
  • Finishing & Fit-out
  • 3D renderings & floor plans

MA Properties Inc. Reviews

Talyssa D'avila

2026-09-08
"Ive had the pleasure of working with Gustavo on past projects and have always been impressed by his work ethic. He is hardworking, reliable, detail-oriented, and committed to quality craftsmanship. Gustavo communicates clearly, takes pride in his work, and gives every project his personal attention. I highly recommend Gustavo and MA Properties and would gladly work with him again."

Janelle Pegg

2026-05-21
"Gustavo and his team once again exceeded my expectations on my recent project. This is my second time using MA Properties for workupgradesrepairs at a rental property, and both times I needed the work done in a very short time frame. Gustavo to the rescue! He came out right away to assess the situation and to talk me through a plan and a timeline for repairs. He and his team got started right away and they were professional and courteous and kind, always checking if I had any questions and if I was satisfied with the progress of the work being done. They finished on time and on budget and the quality of the drywall repairs, texturing, painting and window sill repairs was exceptional. I am so grateful to have found Gustavo and to have him as a resource to help me with my various property needs. The first project was a tenant turnover and involved replacing bathroom counter tops and sinks, installing a kitchen back splash, repairing closet doors and touching up paint. This second project involved drywall repairs, texturing and paint and had to be done in a very narrow time window in order to close escrow on time and with thorough documentation for the buyers. I could not ask for better than Gustavo and his team and will always use them for future needs. Looking forward to some bathroom renovations in the future on my primary residence and will definitely be having MA Properties do the work. Thank you Gustavo!"

Victoria Gladden

2026-04-17
"I had a fantastic experience working with MA Properties and Gustavo. From start to finish, the process was seamless, professional, and exceeded my expectations. Gustavo did an incredible job showcasing my condo the photos turned out amazing and truly captured the space, natural light, and upgrades. The attention to detail in the presentation made a huge difference and really highlighted the best features of the property. Communication was consistent and transparent throughout, and I always felt informed and supported at every step. Its clear Gustavo takes pride in his work and genuinely cares about getting the best outcome for his clients. If youre looking for someone who knows how to market a property effectively and make it stand out, I highly recommend MA Properties and Gustavo."

Nancarrow Realty Group

2026-03-17
"At Nancarrow Realty Group, we work with a wide range of vendors, and Gustavo Mello of MA Properties consistently stands out as one of the very best. We regularly refer Gustavo to our clients for projects of all sizes, and the feedback we receive is overwhelmingly positive. Clients consistently comment on his professionalism, reliability, quality of work, and the care he brings to every job. He is a true professional in every senseorganized, communicative, detail-oriented, and respectful of both the home and the people in it. In an industry where consistency can be hard to find, Gustavo is a breath of fresh air. We trust him with our clients, which is the highest endorsement we can give. It is truly our privilege to recommend Gustavo Mello and MA Properties."

SD Sold Sisters

2026-03-17
"I cant recommend Gustavo and MA Properties highly enough. He has completed multiple projects across several of my propertiesfrom smaller handyman tasks to a full laundry room remodeland every single experience has exceeded expectations. His scope of work for me has included installing French doors, refinishing floors, bathroom work, caulking, and handling dozens of repairs across a rental property. No matter the size of the project, his attention to detail and quality of work are consistently outstanding. What truly sets Gustavo apart is his professionalism and the way he shows upnot just for me, but for my clients as well. As a real estate broker with very high standards who works with a wide range of vendors, I can confidently say he is top-tier. I refer him to my clients often and always with complete confidence. His job sites are impeccably clean and organized from start to finish, with careful attention to protecting the home throughout the process. I fully trust him and his team in my home at any time. His entire crew is friendly, respectful, and a pleasure to work with. Gustavo services my properties in Solana Beach, Encinitas, and Carlsbad, and I recommend him without hesitation to anyone looking for reliable, high-quality work."
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Specifics

Licensed

Opening hours

Monday 8:00AM - 5:00PM
Tuesday 8:00AM - 5:00PM
Wednesday 8:00AM - 5:00PM
Thursday 8:00AM - 5:00PM
Friday 8:00AM - 5:00PM
Saturday 8:00AM - 12:00PM
Sunday -

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