Belgravia Homes

Belgravia Homes is a Phoenix-based casita and ADU builder founded in 2025 by Chris Griffin and James Mack, two construction professionals with a combined 50 years of hands-on building experience. The company emerged from a deliberate decision to focus on custom residential construction, specifically casitas and secondary dwellings that add value and livability to properties across the Phoenix metropolitan area. The name itself reflects the firm's design philosophy, drawn from the London neighborhood of Belgravia, known for timeless architecture, attention to detail, and a commitment to enduring design. This intentional branding signals the company's approach: casitas and ADUs built not as temporary structures or afterthoughts, but as permanent, thoughtfully designed dwellings that belong on their properties.

Chris Griffin brings 25 years of professional construction experience as a licensed general contractor, with credentials spanning civil engineering expertise and three active contractor licenses. His background is diverse: he founded and operated Unique Landscapes and Custom Pools before moving into residential construction, and he built his own first custom home in 2007, an experience that cemented his passion for the craft of building. James Mack brings 20 years of hands-on field experience and has overseen the construction of more than 450 completed homes across Arizona, ranging from luxury custom residences to semi-custom builds. His expertise extends across design and technology consulting, giving the partnership both operational depth and architectural awareness. Together, they founded Belgravia Homes to bring their accumulated knowledge directly to homeowners who want a casita or ADU built well and managed with clear communication from the initial consultation through final inspection.

The geographic scope of Belgravia Homes is substantially broader than many local builders. The company serves Phoenix, Chandler, Scottsdale, Paradise Valley, Mesa, Peoria, Queen Creek, Fountain Hills, Gilbert, Casa Grande, and surrounding communities. This wide service area means homeowners across the greater Phoenix metropolitan region can work with the firm, from the urban core to the outer suburbs and eastward into the valley. The breadth of service territory reflects the firm's confidence in its ability to manage projects across different municipal permitting systems, varying neighborhood aesthetics, and diverse lot conditions. Each Phoenix area community has different building codes, HOA requirements, and local preferences, and Belgravia has mastered these regional differences, a practical asset for any homeowner beginning a casita or ADU project.

Belgravia Homes positions itself around a specific value proposition: transparency, quality, and clear communication throughout the construction process. In an industry where misaligned expectations and unclear timelines often create friction between builders and owners, the firm emphasizes direct, ongoing dialogue. The company's four-step process breaks casita construction into distinct phases: consultation, planning and architecture, construction oversight, and completion with final inspection. Each phase represents an opportunity for the client to remain informed and involved. The consultation phase allows the firm to understand your specific needs, property constraints, and vision for the casita. The planning and architecture phase ensures that designs are tailored to your property and preferences rather than applied as a template. Construction oversight maintains direct communication throughout the build, and the final inspection ensures the completed casita meets both code and your expectations.

What distinguishes Belgravia's positioning is the emphasis on permanent, detached casitas as dwellings designed to add flexibility and value to a property without altering the main home. This phrasing matters: the company frames casitas not as add-ons or temporary structures, but as complementary residential spaces that enhance the property. A properly designed and built casita can serve as a guest suite, a rental unit, a private space for aging parents, or future housing for a growing family. Belgravia's focus on this kind of permanent improvement suggests a builder interested in producing structures that retain and enhance property value over time, rather than cutting corners or building to minimum code. The company's mention of its founders building "over 450 completed homes" signals extensive production experience, meaning the firm has worked through the kinds of problems and refinements that come only with volume and repetition.

Pricing for casita construction in Arizona varies significantly based on size, layout, finishes, utilities, and site conditions, according to the firm's own guidance. Belgravia does not publish fixed pricing online, which reflects the reality that each property presents unique constraints and opportunities. A casita on a large lot with existing utilities might cost substantially less than one on a narrow lot requiring new utility runs and retaining walls. The company's approach is to discuss your specific project during the consultation and planning phases, then provide realistic cost estimates grounded in your property's particular situation. The firm offers guidance after reviewing individual requirements rather than quoting a standard price list, which is the appropriate approach for custom construction work where site specifics drive costs as much as square footage does.

Among Arizona's casita builders, Belgravia Homes operates from a position of established expertise and careful execution. The firm is younger than some local builders but draws on decades of construction experience from its founders. It competes by offering geographic convenience across a large service area, combining the architectural and design knowledge of its team with direct client communication and an explicit commitment to transparency. For homeowners in the Phoenix metro area who are deciding between multiple builders, Belgravia's combination of broad coverage, founder-level involvement, and a clear four-step process provides structure and accountability that many smaller or part-time builders cannot match.

Belgravia Homes is best suited for homeowners across the greater Phoenix area who are ready to invest in a permanent casita or ADU and want a builder who involves them throughout the process. If you value regular communication with your builder, work with architects or designers who want to collaborate on the design, and appreciate founders who remain directly involved in projects rather than distant managers, this is a strong option. The firm's emphasis on quality and permanence makes it a reasonable choice for homeowners who see their casita or ADU as a long-term property improvement, not a short-term project. If you're in any of the Phoenix area communities the firm serves and want a builder with genuine construction depth and an explicit commitment to clear communication, a consultation with Belgravia Homes will clarify what the build process looks like and what's possible on your property.