Martin Architecture, AIA-registered firm on State Street in Carlsbad Village, has designed custom residences and historic-home renovations across coastal North County since 2004. Custom home designs specify fixture locations, supply-line routing, and drain placement during schematic development, coordinating mechanical layouts with plumbing contractors including Vanguard Plumbing & Drains before construction-document release. The firm's historic-preservation portfolio includes period-correct material restoration and adaptive reuse of pre-war structures in La Jolla and along the Carlsbad coastline, maintaining compliance with the Secretary of the Interior's Standards for Rehabilitation. Design and permit packages for ADUs, JADUs, and garage conversions include structural plans and Title 24 energy reports—the complete submittal set required for City of Carlsbad building-department approval. Site-plan development on custom residential lots integrates building footprint, setback calculations, and grading contours with landscape plans from designers including Sand and Soleil Landscape, particularly on sloped parcels requiring retaining-wall coordination. The firm's most technically demanding commissions involve seismic retrofit of unreinforced-masonry historic residences requiring steel moment-frame insertion and foundation underpinning beneath occupied structures.