Posted July 2026 | By Eric Engelbert
What a $53 Million Apartment Deal in Buena Park Can Teach a First-Time Investor
In July 2026, The Bascom Group, an Irvine-based private equity firm, paid $53.125 million for Castlewood Park Apartments in Buena Park — a 183-unit complex built in 1963. The buildings are old. The rents are below market. The amenities are dated. And that is exactly why Bascom bought it.
The strategy is called value-add investing: you acquire a property that is underperforming relative to its potential, invest in renovations and improved management, raise rents to reflect the upgraded product, and collect a property that is now worth significantly more than what you paid. Bascom does this at institutional scale. But the same logic applies to a 4-unit building in Anaheim, Costa Mesa, or Santa Ana, and it is one of the most reliable ways a smaller investor can build meaningful wealth through real estate in Orange County.
This post breaks down how the strategy works, what the numbers can look like on a smaller property, and what to look for when you are searching for a value-add opportunity in OC.
What "Value-Add" Actually Means in Real Estate
The term value-add gets used loosely, but in residential rental real estate it has a specific meaning. A value-add property is one where the current rents are below what the market will support, typically because the owner has not invested in the property, has long-term tenants paying rents that have not kept pace with the market, or has allowed the condition of the units to fall behind comparable properties in the area.
The gap between current rents and market rents is the opportunity. You buy the property based on what it produces today, invest capital to close that gap, and resell or refinance based on the higher income the property generates after renovation. The property value in the rental market is directly tied to the income it produces, so higher rents mean a more valuable asset. That connection between income and value is what makes value-add renovations so powerful.
Bascom paid $290,301 per unit for Castlewood Park. They were not buying those units for what they rent for today. They were buying the rents those units will command after interior renovation, modernized amenities, and professional management. The difference between today and tomorrow, multiplied across 183 units, is where their return comes from. The same math works on 4 units.
How Renovations Create Property Value: A 4-Unit Example
Orange County apartment values for smaller residential buildings are generally calculated using a price-per-unit approach and, at the larger end, income capitalization. Even on a 4-unit building, the income the property produces has a direct effect on what a buyer will pay for it. That means every dollar of rent you add through renovation shows up in the sale price.
Here is a simplified example of how a value-add renovation plays out on a 4-unit building in a mid-tier Orange County city:
| Before Renovation | ||
|---|---|---|
| Current rents | $1,800 per unit / month (below market, long-term tenants) | |
| Gross monthly income | $7,200 (4 units) | |
| Gross annual income | $86,400 | |
| After Renovation (Units Turned Over) | ||
|---|---|---|
| Market rents after renovation | $2,300 per unit / month | |
| Gross monthly income | $9,200 (4 units) | |
| Gross annual income | $110,400 | |
| Annual income increase | $24,000 | |
| Estimated increase in property value* | $300,000 to $400,000+ | |
*Based on applying a market cap rate or price-per-unit multiplier typical of OC 4-plexes. Individual results vary based on location, condition, and market conditions at time of sale or refinance.
The renovation cost to get from $1,800 to $2,300 per unit depends heavily on what the unit needs. In OC, a meaningful kitchen and bath refresh, new flooring, and paint typically runs $20,000 to $40,000 per unit depending on scope and current condition. On a 4-unit building, that is an $80,000 to $160,000 renovation budget — against a potential value increase of $300,000 or more. That is the math that institutional investors like Bascom are running at scale, and it works the same way for an individual investor with one building.
Why the 4-Unit Building Is the Best Starting Point in Orange County
A 4-unit residential property (a fourplex or quadruplex) occupies a unique position in real estate. It is still classified as residential real estate, which means it qualifies for residential mortgage financing. That distinction matters a great deal for someone getting started, because residential loans are more accessible, have lower down payment requirements, and carry better interest rates than commercial loans used on 5-unit and larger buildings.
One of the most powerful entry strategies for a first-time investor is to purchase a 4-plex, live in one unit, and rent the other three. When you occupy one of the units as your primary residence, you may qualify for owner-occupant financing, which typically requires a smaller down payment than a pure investment property loan. The rental income from the other three units helps offset your mortgage, and you are building equity and learning the business from inside the property. When you are ready to move out, all four units become income-producing.
Orange County has a large inventory of older 4-unit buildings, particularly in cities like Santa Ana, Anaheim, Garden Grove, Fullerton, and Costa Mesa, built in the 1950s through 1970s. Many of these have been held by the same owners or families for decades. The rents reflect long-term tenancies rather than current market rates. When those properties change hands, a buyer who is willing to renovate units as they turn over can systematically bring rents to market while staying within state rent control laws, where applicable.
What to Renovate and What to Expect in the OC Market
The goal of a value-add renovation is not to make every unit look like a luxury apartment. It is to make the unit competitive with comparable rentals in the immediate area. Renters in Orange County pay attention to kitchens, bathrooms, and flooring. Updated appliances and in-unit laundry, where it can be added, are among the highest-impact improvements for rent increases. Here is how to think about what moves the needle.
High-Impact Renovations for Rent Growth
Kitchen updates are the biggest driver of rent premiums on older units. New countertops, cabinet fronts or full cabinet replacement, a stainless or modern appliance package, and updated lighting can transform a 1960s kitchen into something a working renter in OC wants. You do not need a full gut renovation. Targeted improvements to the visible surfaces and appliances will close most of the gap with comparable units.
Bathrooms follow a similar principle. New vanities, updated fixtures, reglazing a tub, and new tile or luxury vinyl on the floor make the unit feel current. Replacing dated lighting and adding a quality exhaust fan rounds it out. A bathroom refresh in this vein costs far less than a full remodel and produces most of the same rent bump.
Flooring is visible throughout the entire unit and has an outsized effect on first impressions. Replacing carpet with luxury vinyl plank, which holds up well to tenants and cleans easily, is one of the highest return-per-dollar improvements you can make. It also reduces maintenance costs and tenant turnover disputes over carpet damage.
In-unit laundry connections, where the plumbing and electrical allow for it, add $100 to $200 per month in rent premium in most Orange County markets and dramatically reduce vacancy because renters actively filter for this feature. If the building does not have in-unit laundry, a well-maintained laundry room on site with modern machines is a meaningful improvement over nothing.
Exterior curb appeal, fresh paint, updated lighting at the entry, and clean landscaping all affect how quickly units lease and at what rent level. These are relatively inexpensive improvements that affect every unit in the building simultaneously.
What to Be Careful About
California rent control law (AB 1482) applies to many multifamily properties statewide, with exemptions for buildings built after 2007 and single-family homes and condos under certain conditions. For older 4-unit buildings in Orange County, the law caps annual rent increases for existing tenants at 5% plus local CPI, up to a maximum of 10%. This means the value-add strategy works most effectively as units turn over naturally, rather than through large rent increases on existing tenants. Patience is part of the plan. A well-run building with improving units will also see turnover decline over time as tenant quality improves, which is itself a goal.
Renovation costs in Southern California run higher than national averages. Vet your contractors carefully, get multiple bids, and budget for overruns. The renovation budget needs to be realistic before you underwrite the deal, not optimistic.
Finding Value-Add Opportunities in Orange County
The Castlewood Park deal is instructive on this point. Newcastle Enterprise Limited had owned that 183-unit Buena Park complex for more than 30 years before selling to Bascom. Long-term ownership is almost always associated with rents that have not kept up with the market. When a property like that becomes available, a buyer who understands value-add sees the same thing Bascom sees: below-market rents, deferred renovation, and a clear path to higher income.
The same pattern shows up constantly on smaller properties. The 4-plex that has been in the same family for 25 years, the building where the owner lives out of state and uses a property manager who just rolls leases year to year, the probate sale where the heirs want a clean transaction more than top dollar. These are the properties where the value-add opportunity lives.
On the MLS, look for listings that mention "long-term tenants," "below-market rents," or "value-add opportunity." Days on market matters: a rental property that has been sitting reflects either a pricing issue or a condition issue, and both can create negotiating room. Off-market deals through direct owner outreach, real estate attorneys who handle estate matters, and relationships with other investors and agents who know when these properties are coming available are also worth cultivating.
Location still matters as much as the renovation. A well-renovated unit in a weaker submarket will still underperform a similar unit in a strong one. In Orange County, the cities with the best combination of accessible entry prices and strong rental demand for small multifamily include Santa Ana, Anaheim, Garden Grove, Fullerton, and Costa Mesa. Each has its own rental market dynamics, and understanding the rent comparables in the specific neighborhood before you buy is essential.
Ready to Look at Investment Properties in Orange County?
Whether you are looking at your first rental property or adding to an existing portfolio, the value-add strategy is one of the most effective ways to build equity in Orange County real estate. I work with investors at every level, from first-time buyers evaluating a 4-plex to investors managing multiple properties across the county. If you want to talk through what is available in the market, how to evaluate a deal, or what areas make the most sense for your goals, reach out.
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