CA License #1119373Future Generation
Custom-designed ADU on a Rocklin lot, shaped to the parcel and matched to the main house.
Rocklin · Custom ADU

A Rocklin ADU drawn for one lot —
granite and all.

Some Rocklin backyards sit on rock that no catalog plan accounts for. Our designer draws a bespoke unit around your lot, your house and your family — then we build it through keys.

  • 30+ Years Experience
  • Licensed & Insured
  • 100+ 5-Star Reviews
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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 Rocklin — fast facts

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

Last updated

Why custom in Rocklin

When a stock plan can't read the rock

Rocklin is The Granite City for a reason — there are old quarries downtown, and the bedrock that came out of them sits right under a lot of these yards. A catalog detached plan assumes a flat, diggable pad. Plenty of Rocklin lots don't give you one. We get calls where there's an oak you won't touch, a roll toward the back fence, or shallow granite that turns a routine footing trench into a rock-breaker job. Custom answers what the catalog can't see. Our designer starts from your real parcel — City of Rocklin setbacks, the grade, where the afternoon sun cooks the rear wall, the soil report — and shapes a unit to it. Stock makes your lot obey the plan. Custom makes the plan obey your lot.

Custom ADU framed on a Rocklin lot, sited around an existing mature tree.
  • Drawn around a mature oak, a slope, a pool or shallow-to-bedrock ground
  • Designer works from your survey and soil report, not a fixed concrete pad
  • The fix when no off-the-shelf footprint actually lands on the rock
The design phase

Design phase, site walk to permit

Custom is won or lost in the drawings, so we spend real hours there. It opens with a site walk and a measure-up. I've walked enough Rocklin backyards to know a survey never tells the whole story — especially here, where I want eyes on the ground before I trust a clean-looking pad. Then concept sketches. You react, we revise; most clients run two or three rounds before a floor plan feels right, a few push past five. Once the layout locks we move to construction documents: structural, Title-24, mechanical, plumbing and the PG&E load calc. Honest part — this front end runs six to ten weeks before a permit ever lands at the City of Rocklin counter. That's the trade for a unit nobody else owns.

Custom ADU floor plan and elevations laid out during the Rocklin 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 City of Rocklin
Matching the main house

Echoing a Whitney Ranch or Old Rocklin home

A custom unit should look like it grew out of your house, not like it got dropped behind it. Rocklin's split makes that real work. In the master-planned tracts — Whitney Ranch, Stanford Ranch, Sunset Whitney, Springfield — you're usually matching two-story stucco-and-tile production homes on flat-to-rolling HOA lots, so the unit's massing and roof have to answer a taller house. Step downtown near Front Street and the quarries and it's older Rocklin — smaller homes, lap siding, modest porches, narrower parcels. We match roof pitch, pull the eave depth, copy the trim and source siding that reads the same from the street. Custom is the only way the ADU ends up belonging to the property. A copied stock elevation almost never does.

Custom ADU exterior detailed to match a Rocklin home's roofline and siding.
  • Two-story match for Whitney Ranch, Stanford Ranch and Springfield tracts
  • Roof pitch, eave depth and trim drawn to your home
  • Cottage detailing for Old Rocklin near Front Street and the quarries
Multi-gen + finishes

Multi-generational layouts done right

A lot of our Rocklin custom work is families solving one exact problem — aging parents who want their own front door, or an adult kid staring at local rents near Sierra College who isn't leaving. That reshapes the plan. We draw zero-step entries, 36-inch doorways, curbless showers with grab-bar blocking already 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 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.

Aerial of a larger custom ADU near the 1,200 sq ft ceiling on a Rocklin 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 bolted on 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 Rocklin land roughly $385K to $580K depending on size, finish level and how rough the site is, call it $310 to $485 a square foot. The wildcard here is granite. A 1,150 sq ft premium unit that needs a rock breaker for footings and utility trenches can run past $530K. A stock plan on soft, flat ground would cost less. You're paying for the design, the bespoke footprint, the finishes — and on a rocky Rocklin lot, sometimes the excavator too.
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Save up to $5,000 on your detached, attached, or garage-conversion ADU. Permits and design included.

(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 read1,957 words8 sections

Custom ADU design and construction in Rocklin

Some Rocklin backyards just won't take a stock plan. There's an oak you won't cut, granite a couple feet down that the catalog rectangle never planned for, or parents moving in who need a unit drawn around them. 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 Placer County lot 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 Rocklin backyard with soft soil it's often the right one. 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 City of Rocklin setbacks, the tree locations, the grade, the soil report and how your family 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. Nobody else has this plan.