ADU Design
Site evaluation, concept floor plans and construction-ready drawings shaped around your lot.
Serving Farmington and 23 nearby cities
ADU Builder in Farmington, UT
ADU design and construction for Farmington homeowners. A city with two very different housing eras, and an ADU decision that depends on which one your property belongs to.
No obligation. Every estimate starts with a straightforward conversation and a walkthrough of your lot.
Design → Permits → BuildDetached · Attached · Garage
Building ADUs in Farmington
Farmington is the seat of Davis County — about 24,500 people across 10 square miles at roughly 4,246 feet, with the Wasatch Mountains to the east and the Great Salt Lake to the west. Around 79% of housing is owner-occupied and the average household runs to 3.43 people, with nearly half of households including children under 18.
What makes Farmington distinctive for ADU work is the split between old and new. The Clark Lane Historic District preserves structures from the city’s earliest settlement, and the older streets around it carry deep lots, mature trees and outbuildings that have been there for generations. Then there is the newer development around Station Park and the transit corridor, where lot patterns are tighter, more uniform and more recently planned.
Those two contexts produce different projects. An older Farmington property often has room and an existing outbuilding worth assessing, but also mature landscaping to protect and utility runs that were never designed for a second dwelling. Newer subdivisions have modern services close at hand but less spare ground and firmer setbacks.
The city also experiences lake-enhanced snowfall, which is a genuine design input rather than a footnote — it shapes roof pitch, insulation and where an entrance sits relative to runoff.
What Shapes an ADU Project in Farmington
Two Housing Eras, Two Projects
Older streets near the historic district bring deep lots, mature trees and existing outbuildings. Newer development near Station Park brings tighter, more uniform lots with modern utility service close by.
Lake-Enhanced Snowfall
Farmington sees meaningful winter snowfall off the lake, which shapes roof pitch, insulation depth, gutter planning and where an entry door can sensibly sit.
Mountains East, Wetlands West
The city runs from the Wasatch foothills down to the western wetlands, so grade, drainage and ground conditions vary considerably across a short distance.
What we build
ADU Services in Farmington
ADU Construction
Full-scope building from foundation and framing through mechanical rough-in and final finishes.
Garage Conversion
Turning an attached or detached garage into a self-contained unit using what is already on site.
Detached ADU
Standalone backyard units with their own foundation, entrance and utility connections.
Attached ADU
Additions sharing a wall or roofline with the main house while staying fully self-contained.
ADU Remodeling
Updating an existing ADU, basement apartment or converted space to a livable standard.
Farmington Property Conditions to Plan For
What we assess on a Farmington property:
- Which part of the city you are in — historic-area lots and newer subdivisions raise different questions
- Existing outbuildings — older properties often have a structure worth evaluating before building anything new
- Mature trees and established landscaping — usually to be protected and worked around rather than removed
- Grade — properties closer to the eastern foothills carry more slope than those on the valley floor
- Snow load and runoff paths — roof design and entrance placement, given the local snowfall
- Utility routing on older lots — services on long-established properties were rarely laid out with a second dwelling in mind
Where an existing outbuilding or garage is sound, a conversion is usually the quickest route to a finished unit. Where the lot has room and you want genuine separation, a detached ADU is worth the extra. Either way it starts with design work on the actual property.
Need Help?
ADU Questions From Farmington Homeowners
What comes up most often when we walk properties in Farmington.
Are ADUs allowed in Farmington?
Utah state law makes internal ADUs a permitted use in most residential zones statewide. Detached units fall under Farmington City ordinance, and cities can apply parking, owner-occupancy and rental licensing requirements. Confirm the current position with Farmington City during planning — requirements change, and we help you work through the process.
My home is in an older part of Farmington. Does that complicate things?
It changes the questions rather than complicating them. Older lots are often deeper with more room to build, which is an advantage. What needs attention is protecting mature landscaping during construction, and the fact that utility service on a long-established property was not laid out with a second dwelling in mind, so runs can be longer than expected.
Can I convert an existing outbuilding?
Sometimes, and it is always worth assessing before committing to a new structure. What decides it is the foundation or slab, the wall and roof structure, ceiling height, and how far the building sits from water, sewer and electrical service. Some older outbuildings convert beautifully; others are cheaper to replace than to correct.
Does the snowfall really change the design?
Yes. Roof pitch, insulation depth, gutter and downspout planning, and where an entry door sits relative to drifting and runoff all get decided with the winter in mind. It is one of the clearest differences between building here and building somewhere with a milder climate.
How far is Farmington from your base?
A short drive north of Bountiful. Site visits are easy to arrange and travel does not add a premium to the estimate.
Nearby Areas We Serve
We work across South Davis County and the greater Salt Lake area. If your property is near Farmington, these are the neighbouring communities we cover:
- Centerville — immediately south
- Kaysville — directly north, with larger lots
- Layton — north, the largest city in Davis County
- West Bountiful — south on flat ground
- Bountiful — our base, south along the bench
The full list is on our service areas page.
Build an ADU in Farmington
Farmington properties fall into two camps, and knowing which one yours is in answers most of the early questions about what an ADU here would involve.
We design and build detached ADUs, attached ADUs, garage conversions and basement conversions, and we handle ADU remodels, throughout Farmington and Davis County.
Send us the address and we will come and look at what the property already gives you.