Buying a Two-Unit Building With Friends or Family in San Francisco: A Practical Guide
Sharing a building with people you love can bring something special to everyday life: dinner together on a weeknight, grandparents a flight of stairs away, or a close friend nearby as your family grows. Buying a two-unit building together can make that possible while giving each household a home of its own. In San Francisco, a tenancy in common, or TIC, arrangement can provide the ownership structure to support that vision.
Drew Wilkerson ranked as San Francisco’s #1 TIC agent by transaction count in 2025. Our experience with TIC purchases, multi-unit buildings, and renovations helps buyers connect the lifestyle they want with the practical decisions that make shared ownership work. The process starts with finding a building that suits both households and establishing clear expectations about financing, use of the property, and future plans.
Start With a Shared Vision—and Honest Conversations
Before touring properties, spend time discussing what each household wants from the purchase. Preferred neighborhoods, home size, outdoor space, parking, and willingness to renovate all matter. So do the less visible questions: How long does each household expect to stay? How comfortable is everyone with a major repair? Would one buyer want to rent out their residence in the future?
Financial expectations deserve the same attention. Each household should understand its comfortable purchase price, available down payment, and capacity to contribute to improvements and shared expenses. One buyer may be excited about a substantial renovation while the other wants to move in with minimal work. Understanding those differences early helps focus the search on buildings that make sense for everyone.
Find Two Homes That Work Together
A two-unit search involves evaluating each residence and the building as a whole. Two homes under one roof can offer very different experiences. An upper residence may have more light or additional bedrooms, while a lower residence may offer easier garden access. Layout, condition, stairs, storage, and parking can all influence which home suits each household and how its value compares with the other residence.
An equal split of the purchase price is not automatically the right arrangement. We help buyers evaluate the relative value of each home and its associated amenities so the proposed allocation has a clear basis. Each household should feel enthusiastic about its own home and comfortable with its share of the investment.
For buyers who intend to move into both residences, occupancy is an essential part of property selection. We review the building’s current use, tenancy information, and disclosures early in the process. A listing described as a two-unit building does not, on its own, establish that both homes will be available for the buyers’ intended move-in dates.
Understand the Ownership and Financing Structure
With TIC ownership, each buyer owns a percentage interest in the entire property. A TIC agreement establishes the right to occupy a particular residence and defines how the owners use and manage the building. The ownership interest and the right to use a particular home work together, but they are distinct parts of the arrangement.
Separate fractional TIC loans can allow each household to finance its own ownership interest. This can be especially useful when buyers have different down payments or borrowing needs. Eligibility and terms depend on the lender, property, and borrowers, so financing conversations should begin early. We connect buyers with experienced TIC lenders to establish a workable approach before pursuing a purchase.
Make Everyday Expectations Clear in the TIC Agreement
A thoughtful TIC agreement translates the buyers’ plans into an arrangement everyone can understand. Beyond identifying the residences, it should address parking, storage, yard access, and other exclusive-use or shared areas. These details deserve attention even when the buyers already know each other well.
The financial and decision-making provisions are just as meaningful. How will owners contribute to insurance, property taxes, and maintenance? How will they build reserves, approve a roof replacement, or resolve a disagreement? Discussing those questions gives everyone a clearer picture of the ongoing commitment.
Our transaction experience helps buyers identify the provisions that matter and understand the details before entering escrow. When a purchase requires a new agreement, we can connect buyers with an experienced TIC attorney to draft it around their plans. For an existing agreement, we help buyers understand its terms and identify questions that require clarification. Any proposed changes require the appropriate parties’ consent and professional coordination.
Evaluate Renovations With the Whole Building in Mind
A property that needs updating can give both households the opportunity to create homes that reflect their needs and tastes. Evaluating that opportunity requires looking beyond the kitchens and bathrooms. The condition of the roof, exterior, foundation, and building systems also affects the overall investment and the work owners may need to undertake together.
Drawing on our construction and renovation experience, we help buyers distinguish improvements that support their goals from spending that may diminish the financial advantages of the purchase. We also help them consider sequencing: whether work should happen before move-in, how one household’s project could affect the other, and which shared repairs deserve priority.
Additional space may offer further possibilities. If expansion or a third residence is part of the vision, the evaluation should address the specific building, costs, ownership rights, and approval requirements. The owners also need to agree on who would fund, use, and benefit from the improvement.
Plan for the Day One Household Wants to Sell
Buying together does not mean both households will always have the same timeline. A growing family, job change, or relocation may eventually prompt one owner to move. Discussing that possibility at the beginning helps preserve flexibility and gives everyone a clearer understanding of what shared ownership entails.
A TIC interest can be sold separately, with the agreement and financing structure shaping the process. Buyers should understand the provisions governing a sale, including any notice requirements or rights held by the other owners. If future condominium conversion is part of their thinking, it needs a separate, property-specific evaluation; purchasing a two-unit building does not establish eligibility by itself.
Bring Your Vision Into Focus
The appeal of buying with friends or family is deeply personal. A successful purchase brings that vision together with two suitable homes, workable financing, and clear ownership expectations. Our recent two-unit TIC case study shows how those pieces came together for two longtime friends, including the renovation decisions that helped them create homes they loved.
If you are considering buying a two-unit building with friends or family in San Francisco, we would welcome the opportunity to talk through your plans, evaluate the options, and help you find a property that works for everyone.
