Ground-up multifamily & mixed-use development

Find the moves that make a development deal pencil.

Start with your pro forma. A set of agents proposes the changes that could make it work — a lower cost, a rent premium, a financing structure — and one checked calculator runs the numbers. You see every change and where it came from.

Open the model → Move the levers yourself
Runs in your browser · nothing to install · nothing uploaded
100%
verified to the underwriting model
−17% → it works
agents close the gap
every change
saved with its source

A pro forma tells you what a deal could be. This shows you how to get there.

A development pro forma rarely tells you which changes actually create value, whether the deal really pencils, or where each assumption came from. This tool lets you change any assumption and see the result immediately — by hand, or with an agent making the change for you and showing its work.

Two parts: the calculator, and the agents.

The math is fixed and checked. The agents only suggest inputs — they never change how the deal is calculated.

The engine — one calculator

The same code every run, checked number-for-number against the original underwriting model. Same inputs in, same numbers out. This is the part you can hand to a lender — no judgment, no surprises.

The agents — they suggest, they don't calculate

Five agents (program, cost, revenue, operations, financing) plus a lead that coordinates them. Each proposes changes in its own area, within fixed limits, and saves the source behind each one. The engine does the arithmetic.

From a site to a deal that pencils, in three moves.

1

Start from the site

Begin with an honest base case — the program, the costs, the financing — calibrated to real market comps.

2

Drive it, or hand it over

Move the levers and watch every number recompute instantly — or hand the wheel to the agents and watch them reason the deal upward, move by move.

3

Get something defensible

A full underwriting — sources & uses, returns, debt, the program — with every assumption's source, confidence, and author on the record.

It creates the deal — it doesn't just grade one.

Acquisition tools layer a single AI reviewer over a deal you've already shaped. The Now City Upside Explorer is a development tool: it composes the moves that make a ground-up project work.

A single AI reviewer

  • Grades an existing, stabilized asset
  • Critiques numbers you already entered
  • One generalist voice over the spreadsheet
  • Answers "should I buy this?"

A team that builds the deal

  • Composes the moves that make a ground-up project pencil
  • Attributes who created which value, step by step
  • Five agents + a lead that coordinates them
  • Answers "what do we build, and how do we make it work?"

See the full agent architecture →

Why you can trust the numbers.

The math is the same checked code every run. An agent can suggest an assumption that turns out to be wrong, but it can't change how the deal is calculated — and every assumption it suggests shows its source. That's a number you can take to a lender, not one you take on faith.

Your next project deserves real underwriting.

Explore it free, in your browser. Nothing to install.