3 Best Interior Architects in Philadelphia

Finding interior architects in Philadelphia starts with matching the studio’s experience to the project itself. Some options focus on contemporary homes and complex renovations, while others handle institutional, commercial, multifamily, or infrastructure work.

Before making contact, clarify the project scope, site constraints, regulatory requirements, and whether you need an integrated landscape or interior design approach. A patient process, careful execution, and a clean handover can also matter throughout a renovation.

How this list is ordered

A reputation that holds up over time, real focus on this service and a clear account of how they work: that is how this guide to interior architects in Philadelphia was built and ordered.

Some businesses pay for a fuller profile or a featured position. It is only open to those that have already passed our selection, and it is always marked.

Our top picks

Choose a business to go straight to its entry.

Always by Design

5.018 reviews

Contemporary home designComplex renovations and additions

Toner Architects

4.613 reviews

Perkins Eastman

4.48 reviews

Large multifamily and mixed-use developmentsCampus, transportation, and infrastructure projects

Compare the 3 local options

Always by Design

5.018 reviews

771 S 2nd St Apt G, Philadelphia, PA 19147, United States

Best suited to

Contemporary home designComplex renovations and additions

Always by Design focuses on contemporary and modern residential architecture in Philadelphia, with a process built around direct collaboration with homeowners. Ed Barnhart works from the larger vision down to details such as light, materials, circulation and everyday comfort, helping turn an initial idea into a coherent home.

The practice has handled whole-house renovations, additions, decks, solariums, stairways, elevators and new beach homes, including projects with tight sites or distinctive existing conditions. It also provides on-site services and online appointments for clients who want close guidance through design and construction decisions.

Toner Architects

4.613 reviews

1901 S 9th St #425, Philadelphia, PA 19148, United States

Toner Architects provides full-service architecture and interior design for residential, commercial, and adaptive reuse projects in Philadelphia and the surrounding region. The team brings design creativity together with a grounded understanding of construction complexity, project costs, zoning, and buildability.

Services can cover everything from a focused interior decision to a complete design process, including concept development, documentation, project administration, and interior detailing. The firm also helps clients plan future development, navigate zoning or variance processes, and coordinate cohesive spaces from structure through finishes.

Why it stands out

Sustainable, people-focused design

Perkins Eastman

4.48 reviews

1216 Arch St #8, Philadelphia, PA 19107, United States

Best suited to

Large multifamily and mixed-use developmentsCampus, transportation, and infrastructure projects

Perkins Eastman’s Philadelphia studio works across multifamily and mixed-use, hospitality and resort, college and university, commercial and office, and transportation and infrastructure projects. Its long-standing local presence has contributed to the city’s skyline through sustainable, people-focused design.

The studio’s Human by Design approach emphasizes curiosity, discipline, collaboration, and care, while its landscape architecture specialty integrates buildings with nature-based public-realm design. The scale and breadth of the practice suit complex projects where architecture, infrastructure, sustainability, and the experience of people moving through a place must align.

A quick comparison of the options

#	Business	Rating	Reviews	Best suited to
#1	Always by Design	5.0	18	Contemporary home design
#2	Toner Architects	4.6	13	—
#3	Perkins Eastman	4.4	8	Large multifamily and mixed-use developments

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Mapping interior architects in Philadelphia

Philadelphia’s options are best compared by project scope rather than by a single design style. The available profiles cover residential renovations, custom homes, commercial and institutional work, large developments, and projects connected to campuses, transport, or infrastructure. Use the map to identify which office is practical for your site and meetings, then confirm its current service area before traveling. For complex projects, convenience also includes access to the right consultants and experience with local regulations.

What each one offers

Contemporary home designUseful for homeowners seeking a cohesive modern interior and architectural approach.
Complex renovations and additionsSuitable when an existing property needs a substantial reconfiguration, extension, or coordinated remodel.
Custom homes and renovationsA fit for clients planning a home from the early design stage through detailed renovation decisions.
Multifamily and mixed-use designRelevant to larger residential developments and buildings combining housing with commercial space.
Institutional and commercial designFor organizations planning workplaces, public-facing spaces, or other nonresidential interiors.
Complex sites and regulationsImportant when zoning, site conditions, approvals, or unusual constraints shape the design.

How to compare interior architects in Philadelphia

Send a short project brief with property type, approximate scope, and desired timeline.
Ask for examples comparable to your project, not only visually similar interiors.
Confirm who will manage permits, consultants, site coordination, and construction communication.
Discuss how the studio handles complex sites, additions, or regulatory constraints.
Clarify the design phases, expected deliverables, and how revisions are handled.
Ask how the team protects cleanliness and finishes during work on an occupied property.

Your questions answered

What should I ask an interior architect in Philadelphia first?

Start by explaining the property, the work you want completed, and any known site or approval issues. Ask whether the studio regularly handles that type of project, who will lead it, what the next design stage includes, and which consultants or contractors may be involved.

Are these professionals suitable for large developments?

Some profiles specifically relate to large multifamily and mixed-use developments, as well as campus, transportation, and infrastructure projects. Confirm the firm’s role, project scale, and coordination responsibilities before assuming it offers the same service as a residential interior specialist.

When should I involve an interior architect in a renovation?

Earlier is usually more useful, especially when walls, services, additions, finishes, or approvals may change the plan. Early input can help define the scope before construction decisions are fixed and can reveal whether you need architectural, interior, landscape, or specialist support.

How can I compare studios with different design styles?

Compare their process and relevant experience as well as finished images. Look for work involving a similar property type, level of complexity, and regulatory setting. Then ask how the team translates your priorities into materials, layouts, lighting, and practical maintenance decisions.