Additions That Respect the Olmsted Plan and the Way You Live
St. Francis Wood is unlike any other place to add onto a home. Laid out by the Olmsted Brothers in 1912 as one of San Francisco's original residence parks, the neighborhood reads as a single composition: curving boulevards, planted medians, brick-diamond sidewalks, and the gateway pillars and fountains that anchor St. Francis Boulevard. The houses are an eclectic mix of Spanish Colonial, French, Italian Renaissance, and storybook styles, set on lots roughly twice the size of a typical city parcel. Adding square footage here is not a matter of bolting a box onto the back. It is a matter of extending an existing architectural language without losing it.
New Key Construction builds additions for exactly this kind of home. We are a Bay Area design-build firm, which means interior design and construction live under one roof and one contract. You work with a single team from the first sketch to the final coat of paint, with no handoff between an architect who drew something beautiful and a contractor who later explains why it cannot be built. We design what we build, we price it up front, and we show you photoreal 3D renderings before any permit is pulled.
What an Addition Looks Like Here
Most St. Francis Wood additions follow a few patterns. Generous rear yards make ground-floor extensions a natural move: a larger kitchen and family room that open to the garden, a primary suite, or a connected indoor-outdoor space the original 1920s floor plans never contemplated. Other owners go up, adding a dormer or second-story expansion to gain bedrooms while keeping the street facade intact. Many of these homes also have tall basement and ground-level volumes that can be reworked into livable space without changing the silhouette the neighborhood expects.
Whatever the direction, the design has to carry the details that make these houses what they are: clay tile roofs, arched openings, wrought iron, deep eaves, and proportions drawn by architects like Henry Gutterson, who shaped much of the district. Our designers detail the new work to read as original, and our build team executes it. Because the same firm owns both halves, the plaster reveal, the window sightline, and the roofline transition are decided once and held all the way through.
Permits, the Homes Association, and the Historic District
The regulatory picture in St. Francis Wood is real, and we plan for it from day one. Every residential addition in San Francisco is reviewed against the Planning Department's Residential Design Guidelines, and any project that expands the building or changes exterior features triggers that review. Additions are filed on the city's alteration and addition permit track, which frequently means other agency review and neighbor notification before approval.
On top of city process, the neighborhood has its own active structure. The St. Francis Homes Association has long enforced firm restrictions on the type and quality of construction, and the district was added to the National Register of Historic Places in 2022 as the St. Francis Wood Historic District. Exterior changes in a historic district draw a closer eye, and decisions that read as compatible with the original character move faster than those that fight it. That is one more reason we render the exterior in full before submitting. Seeing the addition in context, in daylight, against the existing facade lets you and the reviewers evaluate the same thing we do.
One Team, Priced Options, No Surprises
Our process removes the two things owners dread most: cost surprises and the blame game between designer and builder. We start with measured design and a clear read of what your lot and the guidelines allow, then present priced options up front so you are choosing scope against real numbers rather than guessing. We produce photoreal 3D renderings before permits, so you approve the look while it is still inexpensive to change. Then our own construction team builds it, with white-glove project management keeping the schedule, the trades, and daily communication in order. On a home you intend to keep, doing it once, correctly, with one accountable team is the whole point.
Frequently Asked Questions
Do I need special approval to add onto a home in St. Francis Wood?
Yes, in two layers. Your project goes through San Francisco Planning's review against the Residential Design Guidelines because it expands the building and changes exterior features, and it is filed on the city's addition and alteration permit track. Because St. Francis Wood is a National Register historic district with an active homes association, exterior work also faces closer scrutiny for compatibility. We map both layers at the start so the design is shaped to clear them.
How long does a home addition take from design to completion?
Timelines vary with scope and the city review queue, but design and approvals typically run several months before construction starts, and construction itself adds several more. The advantage of our design-build model is that design, pricing, and permit strategy advance together rather than in sequence, which removes the usual gap between a finished design and a buildable one. We give you a realistic schedule with your priced options, not an optimistic guess.
Can I see what the addition will look like before committing?
Yes. We produce photoreal 3D renderings of the addition, inside and out, before any permit is pulled. You see how the new roofline, windows, and materials meet the existing home and the streetscape, and you approve the design while changes are still just pixels. This is also what helps the exterior read as compatible with the historic district.
Will the addition match my home's original style?
That is the core of the work here. St. Francis Wood homes carry specific details, from clay tile roofs and arched openings to the proportions set by the district's original architects. Our designers detail the new construction to read as original, and because the same firm builds it, those details survive into the finished work instead of being value-engineered away.
Do you handle both the design and the construction?
Yes. New Key Construction is a design-build firm, so interior design and construction are one team under one contract. You are not coordinating a separate architect, designer, and general contractor. We design it, we price it up front, we render it, and we build it, with white-glove project management throughout.
If you are weighing an addition in St. Francis Wood, start with a conversation. We will walk your home, talk through what the lot and the guidelines allow, and show you priced options with 3D renderings before a single permit is filed. One team, one plan, one accountable result.
