Those are tiny, tiny obstacles compared to where this process succeeds or fails, and that is with the contracting. 

We keep in touch and she has been helpful in connecting me with a contractor and subs.Michelle Saroni (520) 403-3379 Hi Melissa, I'm in the process of covering detached garage to an ADU, curious, how's it coming along?

Quote from @Laura Morlock: I have an opportunity to purchase a very beautiful and unique property - striking century manor house directly on the river, 1.5 acres, huge detached garage/workshop, in a quaint little town 15 mins to two major cities and a little under an hour west of Toronto.I know the property inside and out, it's turnkey, and I would love to own it, but I don't know what to do with it.

He did it while confronting obstacles that would make invalids of most.

Quote from @Craig Jones: I'm not familiar with the rules in LA, but in NorCal detached ADUs on single-family properties are required to have separate utilities. 

June 2nd, 2023State Farm and Allstate have stopped selling new insurance policies to California homeowners, erecting a new obstacle for home buyers.

Rick, I am preparing to convert a detached garage in Anaheim into 2 bedroom ADU.  

Financing provided through this program is only available for properties located in Michigan or Florida.Available Product Type: SOFR 7/6 ARM, SOFR 10/6 ARMLoan Amount: $766,550 MaximumLTV: Purchase and No Cash Out Refinance - Maximum 99%Prepayment Penalty: NoneLoan Assumption: NoneEligible Properties: 1-unit dwellings, attached and detached condominiums, PUDsEscrow: An escrow account must be established for property taxes, and flood insurance, if requiredUnderwritingNo Private Mortgage InsuranceOccupancy – Primary residencesMinimum Credit Score - 700DTI – Max 43% (UW/Mgmt exceptions up to 50% with minimum 3 documented compensating factors)Student Loans – If in deferment, no qualifying payment requiredDown payment of 1% must be borrower’s own funds, while closing costs and prepaids may be gift fundsAttached condominiums require a 10% down paymentEligible Borrowers – Protect and serve heroes are defined as employees of public or private education institutions, employees of medical and healthcare organizations, all first responders, and active or former military personnel.Servicing: Retained

I see this pretty commonly in Phoenix as there already will be obstacles you didn't plan for along the way.

Two recent clients purchased properties with less than $250K down in New Hyde Park and Lynbrook.One property has a detached garage to bring in additional income and the other has a 1-bedroom ADU.Both deals cashflow.These aren't easy to find in a seller's market but they're out there.