An agent prices the property. A contractor prices the work. Nobody tells you whether the deal is worth doing, because nobody has all the numbers in front of them.
I've worked with investors on actual Sacramento-area properties that were purchased, developed with ADUs, renovated and later resold. Construction on those projects was performed by A+ Construction & Remodeling.
The usual way takes multiple visits and multiple conversations, with an agent and a contractor, before you can make sense of a deal.
Now it's one team, from scheduling the first visit to the property, through the city and county inspections during construction, to scheduling the final walkthrough to get the certificate of occupancy.
Adding a unit to a rental you already have costs a fraction of buying a second property, because you're not paying for land, closing costs, or a second investment loan.
Buying a second property is a perfectly good way to add a rental, and it is faster than a build. I represent buyers on investment purchases as well as building on land people already own, so you get the same read either way: what the numbers look like, what the property should earn, and what it will take to get there.
I would rather tell you honestly that buying suits your situation better than sell you a build that does not.
California may allow more units on a property that already has multiple units, up to the number you already have. Restrictions apply and the rules differ from area to area.
A property priced on its current condition, bought because you know what the improved version is worth and what it takes to get there.
An ADU on a single-family rental, or additional units on a property that already has several. More rent, on land you already own.
Duplex through fourplex and larger. Improved to earn more, whether it is priced off comps or off the income.
The houses other buyers scroll past. Worth having when you can price the work accurately before you offer.
A lot, a set of plans, and a house at the end of it. The longest route, and often the most profitable.
Sometimes the best move on a property you already own isn't selling it. That's a calculation, not an opinion.
The same knowledge that prices a purchase correctly works just as well in the other direction. I sell multi-unit and investment property as well as buying it, and I know what the work behind a building costs.
Two to four units sell off comparable sales. Five and up sell off what the building earns. Pricing it the wrong way either leaves your money on the table or sits the listing on the market.
When a buyer asks what it would cost to fix or add to the property, most listings have no answer. I can give a real one, because building is the other half of what I do.
What a property could become is often worth more to a buyer than what it currently is. Proving that upside is the difference between interest and offers.
Send me the address. I'll tell you what it's worth, what the work would cost, and whether the deal stands up.
Talk through a deal