SB9 case studies

Real parcel splits. Measurable property value.

See how California property owners created marketable lots, unlocked equity, and moved difficult approvals forward with Riechers Engineering.

$1.4MSanta Clara second-lot sale with an ADU
$900KApproximate net value created in Milpitas
SoCalLos Angeles, Santa Monica, and San Bernardino results

Urban and Southern California projects

Small lots. Complex reviews. Clear follow-through.

Each project below shows how Riechers moved a difficult review or post-approval issue toward completion.

Los AngelesFinal Parcel Map approved

After multiple rounds of City review and follow-up, the Final Parcel Map was approved, clearing a major milestone for this challenging urban lot split.

Santa MonicaCoastal lot split recorded

On an approximately 11,485-square-foot property, Riechers secured map recordation and is completing the final Corner Record work.

San BernardinoPost-recordation conflict resolved

Existing fence corners and street conditions prevented monuments from being set exactly as shown on the recorded map. Riechers filed and closed a Certificate of Correction to resolve the issue on this approximately 10,501-square-foot lot.

Contra Costa CountyCostly requirements avoided

For an SB9 split with no proposed construction, Riechers secured a note-on-map resolution to the county’s drainage requirement. In a separate review, Peter Riechers spent approximately 18 months challenging a street-widening requirement and involved HCD before the county withdrew it.

Additional completed projects

More completed case studies.

Explore more completed lot splits and the challenges, solutions, and results behind each project.

Santa Barbara County case study property$650K value increaseSanta Barbara CountyEnvironmental health denial overturned

Read on to see how Riechers Engineering overcame complex hurdles with Environmental Health Dept. in Santa Barbara for a significant value add of $650,000.

Challenge: County would not allow the parcel to be divided and denied our lot split application. Environmental health disapproved of the project because it did not meet their septic standards, even though no further development was proposed.

Solution: Riechers Engineering fought the negative ruling and identified double standards in the County’s application of SB-9. Riechers pointed out specific legislature language that showed the county’s argument about septic limitations was not a valid basis for denial.

Result: Riechers Engineering’s persistence paid off. They were able to create a second valuable parcel for their client, increasing their property value by net $650,000.

Sonoma case study property$1.1M in 22 monthsSonoma, CATwo additional full-sized homes unlocked

Discover how Riechers Engineering transformed our client’s property in Sonoma, CA, increasing its value by a staggering $1.1 million in just 22 months.

Challenge: Our client faced zoning and minimum lot size constraints that prevented them from building another home on their parcel.

Solution: With the expertise of Riechers Engineering, we navigated the complexities of the project. Using SB-9, we sidestepped neighborhood notification hurdles and secured ministerial project approval.

Result: In under two years, our client not only gained a second valuable parcel but also unlocked the potential to build two additional full-sized homes without being hindered by subjective design standards. This transformation has increased their property value by $1,100,000 while unlocking a variety of new options for their property.

Novato case study property$600K in 15 monthsNovato, CAEnvironmental challenge resolved

Discover how we helped our client unlock the potential of their property in Novato, CA, increasing its value by an impressive $600,000 in just 15 months.

Challenge: The city initially rejected the lot split project due to environmental concerns and local regulations.

Solution: We proactively engaged our biologist to conduct a comprehensive report on the property. The findings revealed the absence of critical species’ habitat, allowing us to present a compelling case for the project’s environmental compliance.

Result: With this specialized biological report and extensive research, we successfully obtained approval for the lot split and recorded the parcel map, enabling our client to realize the property’s full potential.

Napa case study property$200K value + $50K savedNapa, CACostly infrastructure work avoided

Discover how our client in Napa, CA, increased their property value by $200,000 in just 15 months while saving another $50,000 on development costs.

Challenge: After multiple attempts at subdividing, our client faced daunting demands from the city, including costly infrastructure upgrades. Our client gave up on pursuing a lot split on their own, finally seeking expertise from Riechers Engineering.

Solution: By entrusting Riechers Engineering to lead their SB-9 project, our client avoided the expensive development that the city was originally requiring of them: installation of curb and gutter, sidewalks, street widening, undergrounding electricity, and Right-of-way dedication.

Result: In just over a year, our client became the owner of two separate, valuable parcels. Additionally, our client saw a significant increase in property value and saved $50,000 in additional expenses by hiring Riechers Engineering.

With two valuable parcels now in their name, they achieved their goal without the legwork or unnecessary costs.

Corte Madera case study property$650K in 18 monthsCorte Madera, CA2,000 sq. ft. building footprint separated

Discover how we facilitated a complex lot split for our client in Corte Madera, CA, increasing their property value by an impressive $650,000 in just 18 months.

Challenge: Our client faced restrictions related to minimum lot size and slope, hindering their ability to build another home on their parcel.

Solution: With our expertise, we completed an SB-9 lot split, opening up previously unusable land for development. Now the 2,000 sq ft building footprint sits on a separate parcel, providing future sale opportunities. It is important to note, the SB-9 legislature prevents the city from imposing subjective standards on their future development.

Result: Our client’s property value soared, and they gained the flexibility to utilize their land effectively, all while ensuring their future development remains free from undue city constraints.

San Francisco small-lot case study property$385K before developmentSan Francisco, CA3,716 sq. ft. urban lot split

See how we helped a homeowner in San Francisco turn a modest 3,716 sq. ft. property into a valuable real estate asset — adding $385,000 in property value in under 18 months.

Challenge: The property’s small size presented major hurdles. At just 3,716 square feet, it was too small to qualify for a traditional lot split under local standards. The site was already maxed out for development under standard zoning rules, leaving the owner with very few options for expansion or added value.

Solution: The client hired Riechers Engineering to creatively navigate these limitations using California’s SB9 law. We:

  • Conducted a full eligibility assessment to confirm the property qualified under SB9 guidelines, despite its small size.
  • Strategically designed a project that complied with both state and local SB9 regulations.
  • Prepared and submitted the SB9 lot split and development applications, overcoming zoning and density challenges.
  • Maximized the development potential by enabling the construction of three additional residential units across two newly created properties.
  • Provided full project management, city coordination, and expedited approvals to keep the project on track.

Result: By successfully splitting the property and unlocking the ability to add three new units:

  • The homeowner increased the overall property value by $385,000 with the lot split alone, before any development.
  • They created a second legal parcel, opening the door to selling one parcel, renting new units, or holding for long-term appreciation.
  • The client dramatically increased potential rental income and future resale opportunities, all from a lot many had written off as “too small to split.”

Why the details matter

Engineering through the hard part.

A successful lot split takes more than filing paperwork. Riechers identifies the constraint, builds the technical response, and keeps the approval moving.

01

Property-specific strategy

Lot geometry, access, utilities, existing improvements, and local standards are reviewed together.

02

Agency coordination

The team responds to review comments, works across departments, and uses state guidance when local requirements conflict with SB9.

03

Approval follow-through

Riechers stays involved through mapping, corrections, recordation, and the technical issues that appear after approval.

Start with feasibility

Could your property support a second lot?

Riechers will review the site, identify likely constraints, and outline a clear path forward.

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