Additions & ADUs in San Diego County

Open-concept kitchen and dining area with a view into a bedroom. The kitchen has gray cabinets, a white island with a fruit bowl, and stainless steel appliances. The dining table has a wooden top with yellow chairs, and there is a large abstract painting on the wall.

Expand Your Home Without the Runaround—Clear Scope, Open Markup, Owner-Led Oversight

Additions and ADUs are high-impact projects—and they’re also the easiest to derail if the plan, permitting, and sequencing aren’t tight. Magnify runs additions and ADU builds with radical transparency, strong communication, and craftsmanship-led execution—so you know what you’re building, what it costs, and what it takes to finish well.

We serve San Diego County’s coastal + north county + key inland neighborhoods, including 92109, 92106, 92107, 92103, 92122, 92130, 92118, 92037, 92014, 92075, 92024, 92007, 92008–92011, 92067, 92091, 92127–92131, 92064, and 92104 (plus select secondary areas by fit).

How Magnify Is Different
(Especially for Additions & ADUs)

  • Homeowner Advocate (We protect your outcome and your budget)

    Additions and ADUs can attract vague estimates, optimistic timelines, and surprise costs. We advocate for you by pressure-testing the plan, flagging risks early, and giving clear options (with real pros/cons) so you don’t get backed into decisions mid-build.

  • Radical Transparency (Disclosed markup + written approvals)

    We keep pricing clear, documented, and defensible. If we’re running cost-plus, you’ll see real invoices and our fee/markup disclosed up front. If anything changes—scope, cost, or schedule—it’s updated in writing. No verbal change orders. No mystery numbers.

  • Permitting + Process Discipline (Because “almost permitted” isn’t permitted)

    These projects live and die on planning and approvals. We coordinate the steps, manage the documentation, and keep the build aligned with the permit set and inspection sequence—so you don’t end up with expensive rework.

  • Craftsmanship + Coordination (It has to match your home)

    A new addition or ADU shouldn’t feel like a bolt-on. We care about transitions, rooflines, finish continuity, and the small details that make the new space feel like it belongs.

Learn More About How We Can Help You

Questions We Often Get About Additions & ADUs

  • Yes—either with your architect/designer or through a design-assist approach. The goal is to get a plan that’s buildable, permit-ready, and aligned with budget.

  • Yes. Permitting is a core part of additions/ADUs. We manage permit submissions, revisions, and inspection scheduling as part of the project plan.

  • Depending on fit, we can do fixed-price or cost-plus. If cost-plus, our fee/markup is disclosed up front and you’ll have invoice-level transparency. If fixed-price, scope clarity and written change control still apply.

  • Site and utility realities: existing conditions, trenching, tie-ins, structural requirements, and inspection sequencing. We try to surface these early and build the schedule around what’s real—not what’s convenient.

  • Yes—and often that’s the smartest way. When designed as one integrated plan, it reduces duplication and helps the finished property feel cohesive.

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Ready to experience the Magnify difference?

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