CA License #1119373Future Generation
Custom-designed detached ADU sited with full separation on a large rural Loomis lot.
Loomis · Custom ADU

A Loomis ADU drawn for your acre —
not a catalog.

Big rural lots, septic, horse setups and granite a few feet down don't fit a stock plan. We draw a bespoke unit for your parcel, then build it to final.

  • 30+ Years Experience
  • Licensed & Insured
  • 100+ 5-Star Reviews
ADU Estimator

Estimate Your ADU Project

ADU Type

Size — 400 sq ft

Estimated Cost

$134,000

Rental Income

$2,000/mo

Payback Period

6.3 yrs

Fast. Free. No obligation.

Trusted by homeowners across Sacramento & surrounding areas.

Custom ADU in Loomis — fast facts

CityLoomis
ADU typeCustom ADU
Contractor licenseCSLB #1119373
Free estimate(916) 677-9774

Last updated

Why custom in Loomis

When a stock plan can't read your land

A catalog detached plan is a rectangle that wants a flat, empty rectangle of dirt. Loomis hands you the opposite. These are the big rural-residential parcels off Taylor Road, King Road and through the Loomis Basin — an acre or more, horse properties, mature trees, real grade, and decomposed granite sitting a couple feet under. Custom answers what the catalog can't see. Our designer starts from your survey and the actual lot: Town of Loomis setbacks, where a slope rolls, the drip line on a tree you won't touch, and how far off the main house you want the unit. The reward for all that acreage is room to site a detached unit with genuine separation. The catch is the rock. Custom shapes a plan around both.

Custom ADU framed on a large Loomis lot, sited around existing mature trees.
  • Drawn around mature trees, a slope, a pool or a granite ledge
  • Designer works from your survey, not a fixed concrete pad
  • Big rural lots leave real room to set a unit apart from the house
The design phase

Design phase, site walk to permit

Custom is won in the drawings, so that's where the hours go. It opens with a site walk and a measure-up — and on a Loomis acre, a survey never tells the whole story. I want to see where the decomposed granite breaks the surface, how the grade moves, and where the septic field and leach lines sit before anything gets drawn. Then concept sketches. You react, we revise; most clients run two or three rounds before a floor plan feels right, and a handful push past five. Once the layout locks we move to construction documents: structural, Title-24, mechanical, plumbing, and the PG&E load calc. The honest part — this front end runs six to ten weeks before anything reaches the Town of Loomis counter. That's the trade for a unit nobody else owns.

Custom ADU floor plan and elevations laid out during the Loomis design phase.
  • Site walk and measure-up before a single line gets drawn
  • Two to five revision rounds until the floor plan is right
  • Full construction documents drawn in-house, then filed with the Town of Loomis
Matching the main house

Echoing a Loomis country home

A custom unit should look like it grew out of your house, not like it got parked behind it. Loomis works hard to hold its semi-rural character, and that shows up in the homes. Out along the Loomis Basin you get older country properties, board-and-batten, deep porches, metal roofs — places with a little Blue Goose, fruit-shed heritage in their bones. Closer to Taylor Road and the village core the homes run more traditional. We match roof pitch, pull the eave depth, copy the trim and source siding or a roof that reads the same from the drive. Going custom is the only way the ADU ends up belonging to the property. A copied stock elevation almost never does on a rural lot this open and this visible.

Custom ADU exterior detailed to match a Loomis country home's roofline and trim.
  • Country and board-and-batten match out in the Loomis Basin
  • Roof pitch, eave depth and trim drawn to your actual home
  • Materials picked so the unit reads as part of the property, not a bolt-on
Multi-gen + finishes

Multi-generational layouts done right

A lot of our Loomis custom work is families solving one exact problem — aging parents who want their own front door on the family land, or an adult kid who isn't leaving. That reshapes the plan. We draw zero-step entries, 36-inch doorways, curbless showers with grab-bar blocking already set in the walls, and a second primary suite so two generations each keep privacy. The detached state ceiling is 1,200 sq ft, and custom clients on these big lots tend to push right up against it — at that size you fit two real bedrooms, a full kitchen, a proper living room. Then there's finish level. Quartz, real oak floors, a tiled shower instead of a fiberglass insert. Custom is where the premium package actually fits, designed in from day one rather than bolted on at the end.

Aerial of a larger custom ADU near the 1,200 sq ft ceiling on a big Loomis lot.
  • Zero-step entries, wider doorways, curbless showers, grab-bar blocking
  • Second primary suite so two generations share without crowding
  • Quartz, hardwood and full tile drawn in, not added later
Build Smart. Invest Wise.

Build Your ADU.
Your Investment,
Your Future.

From design to move-in, we handle everything. Transparent pricing, on-time delivery, and uncompromising quality.

Custom Designs

Tailored to you

Built to Last

Premium materials

Fast Turnaround

On-time delivery

Full-Service

From start to finish

30+

Years of Experience

120+

ADU Projects Completed

100+

Happy Homeowners

Completed ADU built by Future Generation in Sacramento

Built for Value.
Designed for Life.

Trusted by homeowners across Sacramento & surrounding areas.

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Your Live Estimate

Detached ADU800 sq ftStandard

Estimated Construction Cost

$189,000

≈ $236/sq ft · all-in, turnkey

Est. Rental Income$2,800/mo
Annual Income$33,600/yr
Build Timeline5–7 months
Payback Period6.3 yrs

15.8% annual ROI

Based on local rents & your selections

Estimate for planning only. Final pricing depends on site conditions, lot, and city fees. Get an exact quote from our team — free.

Hi there!

I'm Tim, your ADU specialist.

I'll help you build smart and maximize your investment.

Tim, ADU specialist at Future Generation

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Tim, ADU specialist

“Every ADU we build is designed to add long-term value and open new possibilities for your property. Let's build something great together.”

— Tim, ADU Specialist

Custom Designs

Built to fit your property & needs

Turnkey Process

We handle permits, plans & everything

Built to Last

Quality craftsmanship that stands the test

Financing Made Simple

$0 Down Options. Build Now, Pay Over Time.

You shouldn't have to drain your savings to build wealth. We partner with trusted ADU lenders to find financing that fits — many homeowners build with little to nothing out of pocket.

Home Equity (HELOC)

Tap your existing equity at competitive rates — the most popular way to fund an ADU.

Renovation Loans

Finance the build against your home's projected after-completion value.

ADU-Specific Financing

Specialized lenders who underwrite based on the rental income your ADU will produce.

Cash-Out Refinance

Roll the project into a new mortgage and keep one simple monthly payment.

Estimate Your Monthly Payment

See what financing your ADU could look like — and how rental income can help cover it.

$180,000Loan amount

Credit Score

Very good · 700–739

Estimated Monthly Payment

$1,320/mo

At 7.99% APR over 30 years (illustrative)

  • Often offset by $2,000–$3,500/mo in rental income
  • No prepayment penalties with most partners
  • Pre-qualification with no impact to your credit

Illustrative only — not a loan offer. Actual rates and terms are set by third-party lenders based on your qualifications.

Frequently asked

Questions, answered

The most common things Sacramento homeowners ask before starting an ADU project.

  • Custom is the priciest path — no soft-pedaling it. For 2025-2026 we're seeing finished custom detached units in Loomis land roughly $389K to $585K depending on size, finish level and how rough the site is, call it $315 to $485 a square foot. Then there's the wildcard: rock. Loomis sits on granite and decomposed granite, so if a footing dig or a utility trench hits foothill rock and needs rock excavation, that's real money on top — a few thousand to well past $20K depending on how much and how hard. A 1,150 sq ft premium unit on a lot that fights you can run past $540K. You're paying for the design, the bespoke footprint, the finishes and the ground itself.
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(916) 677-9774
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Tim, ADU specialist at Future Generation

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Carrie Z
I had two bathrooms completely remodeled, two windows replaced and some siding. Everything stayed on track as planned and I absolutely love the end product. The communication was great.
Carrie Z · Google Review
9 min read1,989 words8 sections

Custom ADU design and construction in Loomis

Loomis lots don't take a stock plan. They're big rural-residential parcels — an acre or more, horse properties, mature trees, and granite a few feet under the dirt. That's when you build custom. We're a Sacramento design-build crew about 25 minutes southwest (CA license #1119373) that draws a bespoke ADU for your exact Town of Loomis parcel and then builds it — design through final inspection, one team the whole way. Call us at (916) 677-9774.

01Section

What actually makes an ADU custom

People throw "custom" around loosely, so let me draw the line the way we do. A stock or model ADU is a plan we've already drawn and built before — you pick a size, maybe swap a finish or two, and it drops onto a flat pad. It's the quickest, cheapest route, and for a clean rectangular backyard it's often the right call. We're glad to build those. But it isn't custom.

Custom means the design starts at zero, on your parcel, for your situation. Our designer takes the survey, the Town of Loomis setbacks, the tree locations, the grade, the decomposed granite, the septic field, the sight line from the main house, and how your family actually plans to live — then draws a unit that didn't exist until your lot called for it. The footprint bends to the constraints. The roofline answers your house. The interior answers your people. Nobody else has this plan.