Summerlin Casitas + Home Additions
Designed & 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 NARI Remodeler of the Year 2025 and 2026 Regional Winner, featured contractor of choice for eight HGTV Property Brothers homes, holder of an unlimited monetary limit on our Nevada State Contractors Board license, and listed in the Architectural Digest AD PRO Directory for 2024, 2025, and 2026. Complimentary in-home consultation for Summerlin homeowners.
Complimentary in-home consultation for Summerlin homeowners.
Nevada State Contractors Board Licenses #0091618 and #0091629 with an unlimited monetary limit — state-approved to design and build projects of any size.
Summerlin Casitas & 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.
Project Feature: The Aster
The Aster is a modern farmhouse casita Kingdom & Co. designed and built in the Lone Mountain neighborhood of northwest Las Vegas. Its scale, floor plan, and modern farmhouse detailing transfer directly to Summerlin lots.
Design & Features
Designed and built as a standalone casita addition, The Aster includes a fully equipped kitchen, contemporary bathroom, spacious open-concept living area, bonus room with vaulted ceiling, and attached garage. The modern farmhouse exterior showcases vertical board-and-batten siding in soft neutral tones, a dark gray roof, a covered front porch with timber columns, and lantern-style exterior lighting.
Inside, the kitchen pairs white shaker pantry cabinets with sage lower cabinetry, marble countertops, a marble waterfall island, a farmhouse sink, subway tile backsplash, and stainless steel appliances. French doors open to a covered patio. The contemporary bathroom features a marble vessel sink with waterfall faucet set against gray subway tile.
Why this translates to Summerlin
What transfers to Summerlin isn’t the farmhouse styling — Summerlin’s architectural language skews Mediterranean, Tuscan, Spanish, and contemporary rather than farmhouse. What transfers is the scope and use-case model: a fully self-contained detached structure with its own kitchen, bath, living area, bonus room, and attached garage, built on a lot with enough buildable envelope to support a true freestanding build. Larger lots in The Ridges, Red Rock Country Club, Tournament Hills, and the original Summerlin villages routinely support casitas at this scale, and Kingdom & Co. designs each one in the architectural language of the main residence — not in a borrowed style. The floor plan logic, the usable square footage, the attached garage integration, and the flexibility to function as a guest house, multigenerational living space, home office, or short-term rental all transfer directly to a Summerlin build.
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.
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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 complimentary 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. What you approve is what gets built and billed; any change order (a scope change you request or a genuinely unforeseen condition) is documented and approved in writing before work moves forward.
What Summerlin homeowners
need to know about
Casita & ADU rules in 206
Nevada AB 396 (2025) reshaped ADU rules statewide
Nevada AB 396, signed into law in 2025, standardized many ADU zoning, size, and permitting rules across Nevada municipalities — including the City of Las Vegas, which has jurisdiction over Summerlin. The law affects what size casita you can build, how it can be used, and in some cases, parking and setback requirements. Kingdom & Co. factors current AB 396 requirements into every Summerlin casita design.
Nevada ROAD Act (2025) reshaped permit timelines
Nevada’s ROAD Act imposed defined response windows on residential building permits across Nevada jurisdictions, including the City of Las Vegas. For Summerlin homeowners, that means more predictable permit timelines on casita and addition work — but only when the application is clean on first submission. Kingdom & Co. prepares complete permit packages designed to minimize revision cycles.
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 (complimentary)
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.
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.
Why Summerlin homeowners
choose Kingdom & Co.
- Design-build integration. Design, interior design, estimating, procurement, and construction all under one roof — no handoffs, no scope gaps, no finger-pointing when something needs attention mid-build.
- Dedicated Summerlin office on Alta Drive. Our project managers, designers, and field teams are minutes from every active Summerlin site.
- NARI Remodeler of the Year 2025 and 2026 Regional Winner. Back-to-back national-level industry recognition.
- Unlimited monetary limit license. State-approved to take on Summerlin casita and addition projects of any size — a credential most Las Vegas Valley builders don’t carry.
- Direct experience with all three Summerlin Community Associations plus The Ridges ARC and Red Rock Country Club ARC. Few firms in Las Vegas have submitted to all five.
- Member of the Southern Nevada Home Builders Association and the National Association of the Remodeling Industry.
- Transparent, line-item pricing. Full estimate during design, before any construction contract is signed.
- BBB A+ rating held since 2018.
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.
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Frequently Asked Questions
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.
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.
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.
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.
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.
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.
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.
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