Second Story Home Additions in San Francisco

Second Story Additions. Amazing Results.


We offer free on-site consultations and estimates with our professional team.


We are a local home remodeling company licensed and insured in the Bay Area.


We have a team of experienced builders, designers, and architects.


During the remodeling process, a project manager will be available at all times.

Second Story Home Additions in San Francisco, CA

A second story addition can add substantial square footage to your home. It is a popular choice for homeowners who may not be able to expand their home’s footprint because of lot size or setback limits. In fact, some homeowners do not want to disrupt their existing landscaping or outdoor living space, so a second story addition is a more sensible option.

At Spaces Home Remodeling, we will work with you from concept to construction. Our talented team of architects, designers, engineers, and builders understand the ins and outs of updating homes in the San Francisco area. We also work with the local municipality to ensure the proper paperwork is filed and inspections are scheduled in a timely manner.

Read on to learn about the variety of second story addition options and the costs.

Second Story Home Addition Options

Whether you want to add a master bedroom suite, several rooms, or a playroom and home office, we can help. Adding a second story will significantly increase your home’s square footage. We want to be sure you understand all the options available so you will get the most use out of your new space.

There are four different second story additions to consider. The first one is to add a second floor from scratch. This would also require building a completely new roof. The second option would be to remove the existing roof, build the second story, then place the roof back onto your home. The third choice is to build the second floor upon an existing structure, like a covered porch or an attached garage. Last, but not least, is a modular build. This would involve building the addition off-site then transporting to your property to be added to your home.

If you are not sure which option would best serve your needs, our team can go over ideas, determine your must-haves, and provide professional insights and feedback. It is our goal to create a space you are excited to come home to.



Second Story Addition Costs

Going up horizontally has its advantages.

Second story additions tend to be less expensive than ground floor additions because we can utilize the existing foundation. However, the cost will vary based on several factors–the amount of square footage added, the plumbing and electrical work required, and roof design.

Speaking of roof design, we can reduce costs by removing the existing roof to build the second story versus constructing a brand-new roof. However, the overall design you desire will dictate which direction we go here. Another option to lower costs is the modular build. The second story is constructed off-site and tends to be completed on a faster timeline than a traditional on-site build. Some homeowners have driven down costs by doing the finishing touches themselves. An added benefit is that it can also be done at your leisure.

Whatever you decide, our Spaces Home Remodeling team will walk you through the process. It is our goal to save you time and money without compromising style and function.

Contact us for a free consultation.

What You Need To Know Before Meeting With Us Or Any Other Contractor

Validating the following information before meeting with a contractor can save you a lot of time and narrow your search:

  1. Visit the contractor’s website check for their license number.
  2. Check they have the right license class (General B12) and that the license is active. 
  3. Check that contractor is bonded
  4. Check that they have an active workers compensation insurance. 

Once you have the contractor’s license number all you need to do is to visit the CSLB (Contractors License Board) and perform a license search. All the information above will be available under the contractors license page.

Click here to check our contractor license information 

What is included in our second story addition estimates?

Our bid includes a detailed description of the scope of work that is involved in your project.

The total cost stated in the bid is for design services, architectural plans (if required and agreed upon), in addition to labor and rough materials. 
Finish materials are not included in the bid as we want to give our customers the freedom to control costs and choose the type and style of the materials to their liking.

How long does a second story addition take to build?

The construction work involved in a second story addition can take anywhere from one to several weeks depending on the scope of work involved.

If a permit was obtained as part of the project, scheduling inspections with a city/county inspector throughout the project, will be required.

The city/county inspection schedule availability can affect the overall timeline.

Does a second story addition require a permit?

If the scope of work involved in your project includes one or more of the following, obtaining a permit will be required: 

* Electrical work
* Plumbing work (if needed)
* Changes to the layout of any existing garage.

City/County permit fees will range between $800-$1700. The city/county determines the fees according to the size and cost of the project.

You do not need to worry about obtaining permits, submitting plans, scheduling inspections or filling in any type of paperwork required by the city or county, as it is part of our service and will be taken care of by our office team.

How soon can we start working on your project?

Our team can usually start the construction work 1-2 weeks from the day the work contract is signed.
In case a permit is required, work will begin 1-2 weeks from the day the permit is obtained and approved by the city/county  

What permits will I need for a second story addition in San Francisco?

This depends on the extent of the addition, but in general you will require a building permit (structural BLD), HVAC and plumbing permits. However if you are in a semi-detached then you will require signoff from the neighbor in the form of a party wall agreement.

Can I live at the property during the remodeling work?

Yes. Staying at home during a second story addition is very common and most of our customers do so. In addition, we do everything possible to make you and your family feel comfortable during the process.

How do we communicate with our customers during the second story addition process?

During the renovation process your project manager, the home remodeling team, and builders who are involved in the remodel, will be 100% available to you.

After signing the work contract, your project manager will open a group messaging system which includes you, our office and any team members related to your project. You can use this platform to ask questions and request updates. In addition, your project manager will visit the property on a daily basis. 

Our home remodeling team will arrive at the property every morning Monday- Friday (if that fits your schedule), in order to meet the project deadline.

Our main goal is for you to be happy with our work and your new home.

Can you also create the design for the second story addition?

Yes. We are a full service Design-Build contractor, meaning we take you from concept to completion including architectural design, interior design, structural engineering, building permit acquisition, and of course construction.

Will a second story addition add value to my home?

The ROI for additions is quite high when compared to most other renovations because you are adding actual square footage to the home. Depending on the type of addition you build, some actually create an ROI higher than the investment itself. Design plays a big factor in this and should never be overlooked! 

How Can We Help You With Your Second Story Addition Project

At Spaces Home Remodeling, we will walk you through the entire addition experience until you are satisfied. Located in San Francisco, CA, our renovation team will design and customize your addition according to your style. We can work with a range of designs and materials to create the space you want.

Whether you are looking to create a small second story addition or a move involved one, Spaces Home Remodeling can make it happen. We pride ourselves on developing excellent relationships with our clients. Our communication channels are always available and we involve our clients every step of the way in the renovation process.

The Process Of Our Second Story Additions

Our renovation process involves several stages. During the Design Phase, our talented designers will work together with you to put your renovating ideas on paper. They will offer expert advice  and discuss the options available for your addition.  This is followed by the planning phase when our architects create a comprehensive plan and schedule of work to ensure that your daily routine remains uninterrupted. We will ensure that our second story addition project activities are done efficiently and effectively with the minimum of disruption to your everyday lives.  

 We promise each of our clients to provide excellent workmanship on every project we undertake.

Spaces Home Remodeling

(415) 903-7962
954 Taraval St. #108, San Francisco, CA 94116
License Number: License #1044595
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