Looking for a smart way to expand your living space, generate rental income, or create a private retreat for loved ones? A granny flat in San Diego may be the perfect solution. Also known as an ADU (Accessory Dwelling Unit), a granny flat is a fully functional living space built on the same property as your primary residence—complete with its own entrance, kitchen, bathroom, and living area.
At Coast Design Build, we specialize in designing and building custom granny flats that fit your lifestyle, property layout, and long-term goals. Whether you’re planning for aging parents, grown children, guests, or rental tenants, our team will help you maximize your space with a beautiful and efficient design.
What is a Granny Flat?
A granny flat is a self-contained secondary unit built on a residential lot. It can be attached to your main house, built above a garage, or stand alone in the backyard. In San Diego, granny flats are gaining popularity due to housing demand, flexible zoning laws, and their many uses:
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Private housing for elderly parents
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Independent space for young adults or guests
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Home office or creative studio
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Short-term or long-term rental unit
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Onsite caregiver or nanny accommodation
With the right design and construction team, a granny flat becomes a functional, stylish, and value-adding part of your property.
Why Build a Granny Flat in San Diego?
San Diego homeowners are increasingly choosing granny flats as a smart investment for both lifestyle and financial benefits. Here’s why:
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Affordable housing solution: With rising home prices, a granny flat offers an affordable way to add livable space without buying a new home.
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Rental income: San Diego’s competitive rental market makes ADUs a great way to earn passive income.
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Family convenience: Keep aging relatives close by while giving them privacy and independence.
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Property value: A well-designed granny flat can significantly increase the resale value of your home.
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Zoning support: San Diego has relaxed ADU regulations, making it easier and faster to get your project approved.
With Coast Design Build, you get a partner who understands local codes, permit processes, and design strategies to ensure a smooth and successful project.
Custom Granny Flat Design & Build Services
At Coast Design Build, we offer complete granny flat design and construction services in San Diego. From initial consultation to final walk-through, we manage every step of the process with transparency and care.
Our services include:
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Site evaluation and planning
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Architectural and structural design
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Permit acquisition and city approvals
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Foundation and construction work
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Plumbing, electrical, HVAC, and insulation
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Interior finishing, kitchens, and bathrooms
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Landscaping and exterior matching
Whether you’re building a compact studio or a two-bedroom unit, we tailor the design to fit your property, budget, and vision.
Why Choose Coast Design Build?
With years of experience and a portfolio of successful projects, Coast Design Build is your trusted partner for granny flat construction in San Diego. Here’s what sets us apart:
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Local expertise: We understand San Diego’s ADU regulations, neighborhood styles, and permitting process.
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Design-focused approach: Every granny flat we build is functional, modern, and visually integrated with the main home.
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Licensed and insured: Our team is fully licensed, insured, and committed to safety and quality workmanship.
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Transparent process: Clear timelines, accurate quotes, and open communication from start to finish.
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Client-first mindset: Your needs, vision, and satisfaction are always our top priorities.
Popular Granny Flat Styles in San Diego
We offer a range of styles to suit your property and preferences, including:
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Detached backyard cottages
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Garage conversions
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Above-garage suites
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Attached side units
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Modern prefab or modular ADUs
From sleek, contemporary finishes to cozy traditional charm, we build granny flats that feel like home.
Start Building Your Granny Flat Today
Ready to add value, comfort, and flexibility to your San Diego property? Contact Coast Design Build to schedule your free consultation. Let’s explore your options and create a custom granny flat that meets your needs today—and adapts to your future.