Have you had it evaluated by a Realtor, or are you relying on Zillow or other online algorithms to estimate your property's value?

With comps ranging from $875K-$1M and your estimated build cost at $550K, the after-completion value gives you a significant equity cushion, making this project highly attractive to lenders.If you plan to hold and rent the property, you could refinance into a DSCR loan after construction, which bases lending on rental income rather than personal income.

Over estimate the costs and not need them?

Refi after construction.These numbers consider only the portion of costs of the HEL attributable to the land purchase, not the payoff of the HELOC (which we took out to buy the Seaside condo).Cash In:                     $66,166 (Cash, 1 year of debt service of HEL, debt service of const. loan, furnishing)Amount Financed:      $548,000 (home equity loan + construction loan + closing costs)Total Cost of build:     $614,166ARV:                               $850,000 (or rather "after construction value")Refi                                $637,500 (75% of value + closing costs)                                        Cash Out                       $89,500New payment             $4500/month (54,000/year)Estimated Cash Flow (pre-tax numbers, so actual mileage may vary)airBNB year 1:            $70,000     (net income $16,000)airBNB year 2:            $100,000   (net income $46,000)airBNB year3+:           $120,000   (net income $66,000)ROI (construction year):    0ROI Year 1 of STR:              24.2% ROI Year 2 of STR:              69.5% ROI Year 3+ of STR:            99.7% Did I calculate these ROI numbers right? 

I’d love your input on whether this deal could appeal to investors and how best to structure it.Property Details:Worth: ~$300,000HOA: $273/month, Taxes/Insurance: ~$170/monthCurrent Rent: $1,880/month (long-term); next tenant advertised at $1,950/month.Mid-term rental potential: ~$2,400/month (I haven’t tried this, but it’s my estimate).My Financing Idea:Large down payment: ~$125,000 (This is my priority to reinvest elsewhere).Seller-financed balance: ~$175,000 at 4.25% for 30 years.Buyers take over taxes, insurance, and HOA.Questions:1.

Keep in mind all these markets are very different than the Cambridge area in terms of tenant base, household income, transit, etc.Happy to connect if you'd like to chat more!

Use softwares like AirDNA and Pricelabs to get an estimate of what you could be making and see if it's worth it.

Many of them might be skilled folks but they are not always the best estimator and business person. 

At the current cost to build estimate $150/sqft, It appears a 1500-1700 sqft new construction will need to sale for around 399,9k to make a decent profit.

Its current projections are to bring in between 150k and 180k with estimated costs of 60k.