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Home Additions · Bay Area

More room, without moving.

A primary suite, a bigger kitchen, a home office or gym, a nursery or a guest room. We design the addition in 3D so it looks like it was always part of the house, engineer it, take it through permits and build it from foundation to finish.

  • Typical: $470 – $750 / sq ft
  • Designed in 3D first
  • Permits handled
Start your addition design Price your addition
New living space in a 500 sq ft San Jose addition with hardwood floors and large windows

What’s included

Everything, start to finish.

One contract and one project manager for the design, the permits and the build.

  • Feasibility & zoning review
  • 3D design & floor plans
  • Structural engineering
  • Permit drawings & approvals
  • Excavation & foundations
  • Framing, roofing & windows
  • Electrical, plumbing & HVAC
  • Interior finishes
  • Second-story & bump-out additions
Typical cost$470 – $750 / sq ft

Typical Bay Area range for a home addition, depending on structure, finishes and site conditions.

Typical timelineMonths

Design and permits usually take longer than construction. Planning carefully up front keeps the build on schedule.

Licensed & insuredCSLB #1064699

Bonded and insured California general contractor with an A+ BBB rating.

Three workers raising a framed wall for a rear home additioni

On the job

Built by the team that designed it.

The designer who drew your addition works with the crew that builds it. One project manager runs the job from demolition to final inspection, keeps your home protected and clean, and keeps you updated.

Cost planner · Home AdditionsTypical $470 – $750 / sq ft

Set the size and finish level for your addition and see a planning range in about a minute.

Price your addition

Gallery

Home Additions by Clever.

Real Clever projects from around the Bay Area. Tap any photo to enlarge.

Ideas

What kind of room do you need?

Every addition is designed to look like it was always part of your house.

Primary bedroom suite

A private retreat with its own bath and closet.

Family room

Room to gather that isn't the kitchen.

Kitchen bump-out

A bigger kitchen or breakfast nook without a full rebuild.

Home office or gym

Dedicated space for work or training.

Nursery or guest room

For a growing family or visiting relatives.

Mudroom or enclosed porch

A landing zone, or indoor-outdoor living.

Featured projects

Recent additions work.

All projects →

Open kitchen with sage-green cabinets, a large island and wide-plank floors in San Jose▶ Video tour
Whole-home remodel & addition · San Jose, CA

Whole-Home Remodel + 500 sq ft Addition in San Jose

A new foundation, a 500 sq ft addition, all-new systems and a custom kitchen, all under one contract.

See the project →

The Clever method

Design, permit and build: one team.

The same five steps on every project, so you always know what happens next.

  1. A designer measuring a dated kitchen with a laser measure as the homeowner points out a soffiti
    01Free consultation

    We talk through your goals, your home and your budget, in person or by phone. Free, with no obligation.

    You get a clear scope and an honest budget range.

  2. A designer showing a homeowner couple a 3D rendering of their kitchen on a laptop
    02Design in 3D

    Our designers create floor plans and full 3D renderings of your space, so you can see it and change it before anything is torn out.

    You get floor plans and 3D renderings you approve.

  3. A project manager, designer and structural engineer reviewing plans on site
    03Engineering & permits

    Our engineers work alongside the designers, and we prepare the drawings and manage permitting for you.

    You get permit-ready drawings, and we handle the city.

  4. Two carpenters hanging white shaker upper cabinets in a kitchen remodel
    04Build

    Our crews build what you approved, with one project manager keeping you updated from demolition to inspection.

    You get one project manager and a protected, tidy home.

  5. A project manager showing homeowners their finished kitchen on the final walkthrough
    05Finish & walkthrough

    We clean up, handle touch-ups and final inspection, and walk through everything with you to make sure you’re thrilled.

    You get final inspection, touch-ups and a walkthrough.

Reviews

What homeowners say.

5.0Google20 reviews →5.0Yelp54 reviews →5.0Houzz60 reviews →A+BBBAccredited business →
★★★★★

Our kitchen remodel and whole-house paint

We hired Clever Design And Remodeling to remodel our kitchen and paint the entire house in San Mateo. Gili was our project manager, and the experience was amazing! He did so much for us, from choosing all the materials to the perfect 3D design the team did for us. They finished our project on schedule, with minimum hassle for us. He promised us, in the beginning, to stay within our budget, and we certainly did!

Meril H.San Mateo, CA
★★★★★

A full house renovation

I just finished a full house renovation with Clever, and I am thrilled with the results! They were super easy to work with, even though I had some changes along the way. The design and planning process was surprisingly smooth, and I love the finishes.

Eliya A.South San Francisco, CA
★★★★★

My parents' kitchen and bathroom

I had a great experience with Clever during my parent's kitchen and bathroom renovation. They could answer all of our questions with knowledge and expertise and eased my mother's anxiety about making such significant changes to their longtime residence. These guys made everything easy for us but kept us in the loop.

Josie B.Menlo Park, CA

FAQ

Home Additions questions.

How much does a home addition cost in the Bay Area?

Bay Area additions typically run about $470 to $750 per square foot. Second stories, kitchens and baths, foundations and site access all affect where yours lands. A 3D design and engineering review give you a real budget before you commit.

Do I need permits for a room addition?

Yes. Additions need building permits, structural engineering and inspections. We prepare the drawings, coordinate engineering and manage the permit process for you.

Should I build an addition or an ADU?

It depends on whether you want more space in your home or a separate living unit, and on your lot and budget. Our guide compares them side by side, and we'll walk through both options at your consultation.

Can we live at home during an addition?

Often yes, because much of the work happens outside the existing living space. We plan sequencing and protection with you up front.

Guides

Plan your addition project

Home Additions by city

Free design consultation

Talk to a designer about your addition.

Free, no-obligation design consultation. Answer a few quick questions and a Clever designer will call to set it up.

  1. Tell us about the projectTwo minutes: what you’re planning, where, when and roughly what budget.
  2. Meet a designerA free consultation at your home or by phone, to understand the space and your goals.
  3. See it in 3DFloor plans and 3D renderings you can change before anything is built, with a written price.

Prefer to talk? (669) 309-5454Licensed, bonded & insured · CSLB #1064699

Get your free consultation

Tell us a little about your project. There’s no cost and no obligation.

Or call (669) 309-5454
(669) 309-5454Start your design