Summerlin Casitas + Home Additions
Designed and Built by Kingdom & Co.
Kingdom & Co. designs and builds detached casitas, guest houses, in-law suites, room additions, and second-story expansions across Summerlin and the wider Las Vegas Valley. Our Summerlin office on Alta Drive keeps our project managers close to every active site. We are the back-to-back NARI Remodeler of the Year winner and have been featured on HGTV’s Property Brothers, in the Architectural Digest AD PRO Directory, and by Martha Stewart’s editorial team.
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Summerlin Casitas and Additions We Build
Every Kingdom & Co. project is designed for the Summerlin home it lives on. We don’t have catalog plans or production layouts. Each casita, guest house, room addition, or second-story build is developed around your home’s existing architecture, your lot’s buildable envelope, and the Summerlin Community Association guidelines that govern your village.
Detached Casitas
Freestanding guest houses with bedrooms, bathrooms, kitchenettes or full kitchens, and private entrances. Designed for visiting family, multigenerational living, dedicated home offices, or extended-stay accommodations. Common on the larger Summerlin lots in The Ridges, Red Rock Country Club, and the older villages where setbacks allow freestanding construction.
Guest Houses
Detached living spaces designed primarily for hosting visitors — bedroom, bath, sitting area, and optional kitchenette. Built to integrate architecturally with your main home so the new structure reads as original to the property, not bolted on after the fact.
In-Law Suites
Connected or detached accessory dwellings designed for multigenerational living. Built to accessibility-friendly standards when needed for aging parents, with thoughtful floor plans that give both households privacy and connection.
Backyard ADUs
Custom-built Accessory Dwelling Units designed as private backyard living spaces — extra bedrooms, guest accommodations, home offices, or extended family quarters. Engineered to meet Summerlin Community Association standards and the City of Las Vegas building code from the first drawing.
Room Additions
Attached expansions that add bedrooms, primary suites, home offices, or living areas to the existing footprint. Common in Summerlin’s older villages where the original floor plan no longer fits how the household actually lives.
Second-Story Additions
Adding a partial or full upper level to single-story homes. Frequent in older Summerlin villages where lot coverage limits ground-level expansion. Designed to integrate with the existing roofline, materials, and architectural language so the new floor reads as part of the original structure.
Kingdom & Co. in Summerlin
Kingdom & Co. operates a dedicated Summerlin office on Alta Drive — placing our project managers, designers, and field teams within minutes of every active Summerlin site. We have completed luxury work across The Ridges, Red Rock Country Club, Summerlin South, The Hills, Queensridge, Tournament Hills, The Paseos, The Trails, and the original Summerlin villages.
Our Summerlin portfolio includes luxury remodels, custom kitchens, primary suite transformations, and the casita and addition work that defines this page. While each project is unique to the home and the homeowner, the through-line across every Summerlin project is the same: a single coordinated design-build team from the first sketch to the final walkthrough.
Casita and Addition Projects Across the Las Vegas Valley
Below are completed casitas from Kingdom & Co.’s portfolio across the Las Vegas Valley. While these specific projects span multiple neighborhoods, each one represents the kind of work our team delivers across Summerlin’s villages and gated communities.
Summerlin Casita and Addition Cost (2026 Estimates)
Every Summerlin casita and addition is custom-priced to the home, the lot, and the scope. The ranges below reflect what Kingdom & Co. typically delivers across Summerlin’s luxury market in 2026.
Detached
Casita
$250,000 – $600,000+ depending on size, finish level, and lot conditions. A casita with a full kitchen, bathroom, and finished interior at Summerlin’s luxury standard typically falls between $350,000 and $500,000 fully built.
Room
Addition
$300 – $500 per square foot of added space. A 400-square-foot primary suite addition at the upper end of that range lands around $200,000 fully built.
Second-Story Addition
$400 – $700 per square foot of added space. Higher per-foot cost than ground-level additions because of structural and roof-tie-in work. Common total ranges: $300,000 – $700,000+ depending on the size of the new floor.
Garage
Conversion
$80,000 – $200,000+ for converting unused garage bays into livable square footage — studios, home gyms, accessory dwelling units, or extended living areas.
Outdoor Living Structure
$40,000 – $300,000+ for covered pavilions, pool houses, and outdoor kitchens. Range depends on roofing, plumbing, electrical, and how integrated the structure is with the main home.
Final pricing is developed during the free in-home consultation based on your specific home, lot, and HOA constraints. We don’t quote against generic per-square-foot numbers — every Summerlin project gets a transparent cost breakdown before any design contract is signed.
Summerlin Community Associations and Architectural Review
A Summerlin casita or addition project moves through more architectural review than most other parts of the Las Vegas Valley. Summerlin enforces three layers of design standards, and the guard-gated communities add a fourth. Kingdom & Co.’s project managers handle every layer — submitted in parallel with City of Las Vegas permitting so approvals are secured before construction begins.
The Three Summerlin Community Associations
Summerlin North, Summerlin South, and Summerlin West each enforce their own architectural standards for casitas, additions, and exterior modifications. Setback requirements, lot coverage limits, height restrictions, exterior material standards, and roofline guidelines all vary by association. Kingdom & Co. has direct experience submitting to all three.
The Ridges
The Ridges Architectural Review Committee operates as a separate review beyond the broader Summerlin community standards. Their architectural guidelines are among the most detailed in the valley — exterior materials, color palettes, roof tile, and even landscape elements are reviewed in addition to the structural scope. Kingdom & Co. handles the full Ridges ARC application.
Red Rock Country Club
Red Rock Country Club enforces its own ARC review beyond the Summerlin community standards. The review process is similar in rigor to The Ridges, with additional standards specific to the community’s golf course and clubhouse-facing architectural character. Kingdom & Co. has completed work inside Red Rock CC and is familiar with the submission process.
Queensridge, Tournament Hills, The Paseos, and The Trails
Each of these Summerlin sub-communities maintains its own architectural standards. Older villages tend to enforce more restrictive lot coverage limits and stricter material guidelines than newer Summerlin South villages. Kingdom & Co. prepares each HOA application with architectural renderings, material specifications, and the level of detail every Summerlin ARC requires.
City of Las Vegas Permitting
Most of Summerlin falls within the City of Las Vegas, where building permits for additions are issued through the Development Services Center. Casitas, room additions, second-story builds, and garage conversions all require permits before construction begins. Kingdom & Co. manages the entire permit process from application through final inspection — including any revision cycles required by the plan reviewer.
Our Summerlin Casita and Addition Process
Every Kingdom & Co. Summerlin project moves through the same three-phase process. The structure is what allows us to deliver award-winning work consistently — and it’s what eliminates the most common source of frustration in casita and addition work: miscommunication between separate designers, architects, and builders.
Phase 1: Consultation
On-site visit at your Summerlin home. We walk the property with you, assess the existing home’s architecture and the lot’s buildable envelope, and discuss any HOA or zoning constraints specific to your village. We outline a realistic scope and budget range before any design work begins. This phase is free.
Phase 2: Design
Our in-house design team develops architectural plans, material selections, fixture specifications, and 3D renderings. Because our designers and builders work alongside each other from day one, every design choice is vetted for constructability and cost before it’s presented to you. Long-lead materials are specified during design so orders go in early and the trades have what they need when construction begins.
Phase 3: Construction
Summerlin Community Association submission, City of Las Vegas permitting, site preparation, foundation, structural work, mechanical and electrical installation, finishes, and final walkthrough. Kingdom & Co. self-performs finish carpentry and plumbing with our own crews, and partners with preferred outside vendors for custom cabinetry and other specialty fabrication. One project manager and one superintendent oversee every phase.
Ready to Start Your Summerlin Casita or Addition?
If you’re considering a detached casita, guest house, in-law suite, room addition, or second-story build in Summerlin, we’d welcome the conversation. Our design-build process starts with a free in-home consultation — we walk your property with you, assess what’s possible within your village’s standards, and develop a realistic scope and budget range before any design work begins.
Frequently Asked Questions
Yes. Casitas, room additions, and any construction that adds square footage to your property require building permits from the City of Las Vegas Development Services Center. The permit process covers foundation, framing, electrical, plumbing, and mechanical work. Kingdom & Co. handles the full permitting process as part of every addition project.
In most cases, yes. Summerlin’s three community associations — North, South, and West — require architectural review for additions, casitas, and detached structures. Guard-gated communities like The Ridges and Red Rock Country Club have additional review standards. Kingdom & Co. prepares and submits the full HOA application, including architectural renderings and material specifications, during the design phase.
A casita is a detached, standalone structure — typically a guest house with its own entrance, bedroom, bathroom, and sometimes a kitchen. A room addition is attached to the existing home, expanding its footprint with new bedrooms, living areas, or primary suites. Both require permits and HOA approval in Summerlin. Kingdom & Co. designs and builds both types.
It depends on your lot size, setback requirements, and lot coverage limits set by both the City of Las Vegas zoning code and your HOA. Larger lots in communities like The Ridges, Tournament Hills, and The Paseos are more likely to accommodate a detached casita. Kingdom & Co. evaluates buildable area and zoning constraints during the initial consultation.
Timeline depends on the scope of the addition and the HOA approval process. A single-room addition typically takes several months from design through completion. Larger additions and detached casitas that require new foundations, utilities, and roofing extend that timeline. HOA architectural review adds lead time at the front end. Kingdom & Co. provides a detailed project timeline during the design phase.
Kingdom & Co. builds casitas and home additions throughout Summerlin, including The Ridges, Summerlin South, The Willows, The Paseos, The Arbors, Tournament Hills, Red Rock Country Club, Country Club Hills, and Sun City Summerlin. Our Summerlin office is located on Alta Drive.
