What Fortress Development Group LLC Does
Fortress Development Group LLC is an ADU contractor serving Las Vegas and the surrounding Nevada communities. They specialize in accessory dwelling unit construction, handling everything from initial design through permitting and final build. Their services cover a range of ADU types, including detached ADU construction, garage conversion ADUs, attached ADUs, and backyard cottage construction projects.
An accessory dwelling unit is a self-contained secondary residence built on the same lot as a primary single-family home. It includes its own entrance, kitchen, bathroom, and sleeping area. In Las Vegas and across Nevada, ADU construction is permitted on most single-family residential lots, subject to local zoning and setback requirements.
ADU Types and Construction Costs
Fortress Development Group works with homeowners to identify the most suitable ADU type based on lot size, available space, existing structures, zoning regulations, and intended use. The most common options they build include:
- Garage conversion ADU — typically the most cost-effective option, ranging from $50,000 to $120,000
- Backyard cottage or compact detached ADU — generally ranging from $100,000 to $200,000
- Fully custom detached ADU — ranging from $200,000 to $400,000 or more depending on size, finishes, and site conditions
As an accessory dwelling unit builder, Fortress provides a free, itemized quote so homeowners understand the expected costs before making any commitments. Every project they take on is treated as a custom ADU construction engagement — they do not use pre-drawn plans or standard templates. Their team develops a tailored design for each lot, taking into account aesthetic preferences and intended use.
All ADU construction in Las Vegas requires permits from Clark County or the City of Las Vegas, depending on the property address. Permits are required for structural work, electrical, plumbing, and mechanical systems regardless of ADU type. Fortress manages the complete permit application process, including engineering drawings, permit submission, coordination with building departments, and all required inspections. Homeowners are not expected to navigate the regulatory process on their own.
Construction timelines vary by project type. A garage conversion ADU typically takes two to four months from permit approval to completion. A backyard cottage or small detached ADU usually takes four to six months. Larger custom ADU construction projects may take six to eight months or more. Fortress provides a detailed construction timeline before work begins and delivers regular progress updates throughout the build.
Service Area and Getting Started
Fortress Development Group LLC provides ADU construction services across a broad area of the Las Vegas valley and surrounding communities, including:
- Las Vegas
- Henderson
- Summerlin
- North Las Vegas
- Enterprise
- Spring Valley
- Green Valley
- Southern Highlands
- Paradise
- Whitney
- Boulder City
- Laughlin
On the question of rental use, Nevada and Clark County generally permit homeowners to rent accessory dwelling units, subject to applicable zoning rules and short-term rental regulations where relevant. Rental feasibility is addressed during the initial consultation, and projects are designed and permitted with the homeowner's intended use in mind.
A professionally built ADU adds livable square footage, creates rental income potential, and can broaden buyer appeal. For homeowners interested in moving forward, Fortress offers a free consultation and site assessment. Their ADU contractors visit the property, review feasibility, discuss goals, and outline the scope, timeline, and costs involved — with no obligation to proceed.
