Paradise Valley Residence
A 1980s house reimagined in a warmer, more cohesive language, with a new kitchen and primary suite, custom millwork throughout and two new fireplaces.
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Julia Costa Design, bespoke architecture and interiors
Warm, enduring homes and hotels, with the architecture and interiors designed as one.
Julia Costa Design is a full-service boutique studio for architecture and interiors, founded by licensed architect Julia Costa. Plans, millwork, lighting, finishes and furnishings are resolved together, and Julia stays personally involved from concept through construction.
Meet the studioSelected work
Private residences and hospitality projects from the studio, 2024 to today.
An additional portfolio of completed luxury residential, multifamily, hospitality and workplace projects is available to prospective clients on request.
Ocean City Mansion
A full-gut renovation of a historic boutique hotel, with interiors, FF&E, branding and procurement carried from first concept through installation.
View projectWoodstown Residence
A new, classically proportioned house, with the interiors developed alongside the architecture from space planning through a sealed permit set.
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Every project from the studio, by type.
Construction drawings
The Paradise Valley interior set, in the order it’s drawn: demolition and partitions, ceilings, lighting and power, finishes, enlarged plans and elevations, millwork details and schedules.
Client Visualization
Woodstown ResidenceView the project
Concept through construction
One studio carries a project through every phase, so decisions made in the plan are still intact on installation day.
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Study
Every project starts with the site and the brief: existing conditions, zoning and feasibility, circulation and the relationships between rooms.
- Site and zoning analysis
- Feasibility and massing
- Space planning
- Existing conditions
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Design
Architecture and interiors develop together, tested in 3D and refined down to the millwork profile and the placement of every light.
- Schematic design
- Design development
- 3D visualization
- Custom millwork
- Lighting and finishes
- Furnishings
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Document
Drawings that builders can price and build from, coordinated with consultants and carried through permitting.
- Construction documents
- Sealed permit sets
- Interior elevations and details
- Consultant coordination
- Permitting
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Deliver
Furniture, fixtures and equipment are specified and purchased, and the studio stays involved on site through installation.
- FF&E specification
- Procurement and purchasing
- Construction administration
- Installation coordination
For hospitality clients, the studio also develops branding and a cohesive visual language across the property.
Julia Costa
Licensed architect and founder
Julia Costa Design is a full-service boutique architecture and interiors firm, specializing in thoughtfully crafted residential and hospitality environments. The studio blends architecture, interiors and meticulous detailing to create spaces that are both timeless and deeply personal.
Before founding the practice in 2024, Julia was a Project Architect at a high-end architecture firm in Philadelphia, working across luxury residential, hospitality and commercial design: custom homes, boutique coworking environments, hotels and restaurants.
The studio is intentionally small. Julia stays personally involved from concept through construction, so every project receives the care, creativity and attention it deserves.
Great design comes from close collaboration, thoughtful communication and direct involvement in every phase of a project.
- Founded
- 2024
- Principal
- Julia Costa, licensed architect
- Disciplines
- Architecture, interior architecture and design, FF&E and procurement, construction administration
- Project types
- Private residences, renovations and boutique hotels
- Recent work
- Arizona and New Jersey
The Edit
The pieces Julia loves, from her own living room to her favorite designer finds, gathered where you can shop them.
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On ShopMy The Living Room Edit Pieces from Julia’s own living room Shop the edit (opens in a new tab)
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On ShopMy Designer Finds Her favorite designer pieces Shop designer finds (opens in a new tab)
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On LTK Julia on LTK Her storefront of everyday picks Visit the storefront (opens in a new tab)
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On Amazon Amazon Home Finds Home favorites, easy to order Shop home finds (opens in a new tab)
These links open Julia’s storefronts on ShopMy, LTK and Amazon. Some are affiliate links, so Julia may earn a commission on purchases.
Julia, et cetera.
Follow along for projects, finds and the rooms in between.
Begin a project
Tell us about the place, your timeline and how you hope it will feel to live or stay there. The studio is intentionally small, so Julia leads every project personally.
Or write to the studio
hello@juliacostadesign.com