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PodcastPublished October 11, 2025
Happy House Hacking Podcast EP 25: How to Turn Small Lots into Gold Mines
Link to full podcast episode here:
How to Turn Small Lots into Gold Mines
From Tiny Lots to Massive Profits: Real Estate Investing Secrets Revealed
What if the key to real estate investing success was hiding in plain sight?
Could a modest residential lot hold the potential for life-changing wealth?
Enter John Rourke, a seasoned investor, developer, and urban infill expert. He's built a career on transforming overlooked properties into profit machines.
Rourke's secret lies in identifying hidden gems in established neighborhoods.
By thinking creatively and leveraging tools like Accessory Dwelling Units (ADUs), secondary living spaces on single-family lots and Senate Bill 9 (SB9), which allows for lot splits and duplex construction, he's cracked the code to real estate riches.
In this exclusive interview, Rourke shares his innovative approach and time-tested strategies for investing success.
The Untapped Potential of Urban Infill
Rourke's specialty is urban infill development, an approach that focuses on creating housing within existing neighborhoods rather than expanding into new areas.
This strategy tackles California's housing shortage head-on while presenting savvy investors with lucrative opportunities.
"Infill development is about building smarter, not just bigger," Rourke explains. "By increasing density in established areas, we create more housing options and preserve community character at the same time."
Harnessing the Power of Accessory Dwelling Units (ADUs) and Senate Bill 9 (SB9)
Two of the most powerful tools in Rourke's arsenal are Accessory Dwelling Units (ADUs) and Senate Bill 9 (SB9).
These innovative housing solutions have unlocked immense potential for boosting density and building equity in California's competitive real estate market.
The ADU Advantage
ADUs, also known as granny flats or in-law units, are secondary living spaces built on single-family lots. These self-contained units can be detached, attached, or converted from existing structures like garages.
They typically include a bedroom, bathroom, and kitchen, making them ideal for multi-generational living or rental income.
"ADUs are the fastest way to add more housing to existing neighborhoods," Rourke explains. "By converting underutilized space or building a separate unit, homeowners can nearly double the value of their property while providing much-needed rental stock."
California has recently streamlined the ADU approval process, waiving parking requirements and reducing fees to encourage more construction.
Rourke believes ADUs are the most effective tool for chipping away at the state's housing deficit.
Subdividing for Success with SB9
SB9, on the other hand, is a landmark law that took effect in 2022. It allows homeowners to split single-family lots and build up to four units, two primary homes and two ADUs.
This legislation aims to gently increase density in single-family neighborhoods without drastically altering their character.
"SB9 is a game-changer for infill development," Rourke shares. "It allows for a mix of housing types that cater to different family sizes and income levels."
Under SB9, lots can be split with minimal setbacks and no minimum lot size requirements.
Homeowners can either sell the newly created lots or build rental units themselves. Corner lots are especially valuable, as they allow for maximum separation between units and separate entrances from different streets.
While some cities have been slow to embrace SB9, Rourke sees it as an incredible opportunity for savvy investors. "By subdividing a large lot and building multiple units, you can create exponential value while providing more affordable housing options," he explains.
Together, ADUs and SB9 form a powerful toolkit for small-scale developers looking to maximize returns and contribute to solving California's housing crisis.

Finding Your Entry Point
For aspiring investors, Rourke suggests starting small and leveraging existing resources. Partnering with friends or family can help share costs and risks.
Targeting fixer-uppers in desirable areas allows you to add value through strategic upgrades.
Another smart strategy is utilizing the live-in tax exemption by occupying a property for two years before selling. "You can pocket up to $500,000 in tax-free profits as a married couple," Rourke explains.
Making Debt Work for You
While some investors shy away from debt, Rourke sees it as a powerful tool when used wisely.
His criteria for leveraging loans include ensuring the projected equity gain exceeds interest costs, confirming rental income can cover holding expenses, and having multiple exit strategies.
"I'm comfortable with debt when I'm confident the returns will outpace my borrowing costs," he shares. By mitigating risk and maximizing potential, Rourke turns debt into a wealth-building lever.
The Art of Deal Analysis
At the heart of Rourke's success lies his eye for analyzing deals. He focuses on worst-case scenarios and back-of-the-napkin math to evaluate a property's potential.
Rourke first estimates the minimum rent needed to cover carrying costs. Next, he projects the equity gains from his planned improvements. Finally, he identifies multiple exit strategies in case plan A falls through.
"I always ask myself, 'What if I can't sell right away?' If the numbers show I can rent it profitably, I know I have a solid deal," he explains.
By stress-testing his investments, Rourke minimizes risk and maximizes his chances of success.
Overcoming Objections and Pushback
Increasing density in existing neighborhoods often faces pushback from residents resistant to change.
Rourke navigates these challenges through open communication, thoughtful design, and a focus on community benefits.
"Change can be scary at first," he acknowledges. "But when neighbors see how these projects can blend in and enhance the area, most come around."
Rourke finds that proactively addressing concerns, incorporating contextual design elements, and highlighting the benefits of added housing helps turn naysayers into advocates.
Navigating Uncharted Territory
As an early adopter of SB9, Rourke had to pioneer its implementation in reluctant cities. His persistence has paved the way for other investors to follow in his footsteps.
While getting his first SB9 project approved took nearly two years, Rourke has since helped a dozen friends pursue similar developments. "It's becoming more and more commonplace as cities get comfortable with the new norm," he shares.
The Power of Relationships
Rourke attributes much of his success to cultivating strong relationships with contractors, city officials, and fellow investors.
He treats everyone with respect, communicates clearly, and consistently follows through on his commitments.
"Real estate is a people business," he emphasizes. "The more trust you build, the more opportunities come your way."
Rourke's network of mentors and colleagues has been instrumental in his growth as an investor.
Forging Your Own Path
For those looking to break into real estate investing, Rourke offers this advice: Start talking about your goals with everyone you meet. Seek wisdom from others' successes and failures.
Get creative with financing. And most importantly, take action on your first deal, even if it's scary.
"The first deal is always the hardest, but it gets easier with experience," he reflects. "The key is to keep learning and refining your strategies."
Embracing the Investor Mindset
Ultimately, Rourke encourages aspiring investors to view real estate as a vehicle for long-term wealth creation, not just quick profits.
This means focusing on cash flow and equity growth, reinvesting gains into new projects, and staying adaptable in the face of market shifts.
By treating real estate as a business and committing to constant improvement, Rourke believes anyone can achieve financial independence through investing.
Accelerating Your Real Estate Success
John Rourke's success story highlights the power of creative thinking and strategic investing in real estate.
By focusing on urban infill development and leveraging tools like ADUs and SB9, he's built a thriving career transforming overlooked properties into profitable investments.
Rourke's approach emphasizes the importance of identifying untapped potential in established neighborhoods, crafting smart financing strategies, and building strong relationships with industry professionals.
His willingness to embrace change and pioneer new strategies has positioned him as a leader in California's evolving real estate landscape.
Through persistence, adaptability, and a commitment to continuous learning, Rourke has navigated the challenges of an ever-changing market.
His story serves as an inspiration for aspiring investors looking to make their mark in real estate.
By adopting an investor mindset, focusing on long-term wealth creation, and staying attuned to emerging opportunities, anyone can follow in Rourke's footsteps and build a successful real estate investing career. The key is to start small, learn from every experience, and never stop growing.
Feeling inspired to launch your own investing journey? Start by putting Rourke's strategies into action:
- Talk to everyone you know about your goals
- Find an experienced mentor to guide you
- Analyze deals using conservative numbers
- Take smart risks and learn from every project
Remember, success in real estate investing rarely happens overnight. It takes dedication, hard work, and a willingness to learn from both triumphs and setbacks.
But with the right mindset and strategies, you too can turn tiny lots into massive profits and achieve your real estate investing dreams.
Take the First Step Towards Real Estate Success
Ready to accelerate your progress?
Join us at the next Happy House Hacking meetup to connect with fellow investors and uncover your ideal first deal. Together, we'll help you hack your way to real estate success.
Don't miss out on this incredible opportunity to learn from experienced professionals and network with like-minded individuals.
Follow us on social media to stay up-to-date on upcoming meetups and exclusive industry insights:
Instagram: @theschwaegerleteam
Facebook: The Schwaegerle Team
LinkedIn: Owen Schwaegerle
By connecting with us on social media, you'll be the first to know about future Happy House Hacking events, where you can gain valuable knowledge, share your experiences, and forge lasting partnerships.
Follow us today and join the Happy House Hacking community. Your path to success starts here!
About the Authors
Owen and Camille Schwaegerle are more than just real estate professionals, they're house hackers, investors, and passionate advocates for smart homeownership.
As a dynamic husband-wife team with deep roots in California real estate, they combine Owen's third-generation real estate expertise with Camille's innovative marketing approach. Together, they help clients navigate the path to financial freedom through strategic real estate decisions.
Ready to explore your options in this evolving market? Contact the Schwaegerle Team for a free consultation and access to their detailed market reports.
Together, they'll help you navigate these changes and find your perfect home.
