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.
Featured property outcomes
Proof you can verify.
These public listings show how a new legal parcel can become a saleable real estate asset. Each project and market is different.
3390 Forest AveSanta Clara, CA
The newly separated second lot, including an ADU, sold for $1.4 million.
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New parcel: The lot split created a separate second property with an ADU.
Outcome: The new property sold for $1.4 million, representing an approximate $1 million increase in property value.
640 Evans RdMilpitas, CA
The newly created lot sold, converting part of the original property into a separate marketable asset.
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Outcome: The newly created lot sold, producing a $900,000 net value increase.
336 Merrilee PlDanville, CA
The newly created vacant parcel was brought to market at a $1 million listing price.
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New parcel: The lot split created a standalone vacant property.
Outcome: The new parcel was brought to market at a $1 million public listing price.
Figures are specific to the properties shown and reflect linked public listings and project information. Individual results vary.
Additional completed projects
More completed case studies.
Explore more completed lot splits and the challenges, solutions, and results behind each project.
$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.
$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.
$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.
$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.
$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.
$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.
Property-specific strategy
Lot geometry, access, utilities, existing improvements, and local standards are reviewed together.
Agency coordination
The team responds to review comments, works across departments, and uses state guidance when local requirements conflict with SB9.
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.





