The AI Property Analysis Playbook for Claude 🏠
How to underwrite 40 deals a week without hiring an analyst, burning a weekend, or trusting a single broker-claim number.
Hey everybody, welcome to PropAnalyst.
This is the first post in the series, and it is the one I wish I had four years ago. It is the operating loop I now run on every deal that hits my inbox.
A reader who ran the loop below against 38 listings in Valencia last quarter filtered out 31 of them in under two hours. Average manual underwriting time per property before the loop: about 45 minutes. Average time after: under 4 minutes per listing. The decisions he made on the remaining 7 did not get faster. The 31 he killed got faster.
Most investors think the unlock in real estate is more deal flow. Wrong.
The unlock is killing the 8 out of 10 deals that should have been killed in the first ten minutes. Deal flow without that filter is just a longer commute to the same answer.
This post is the filter. It is a 5-axis scoring rubric, a structured listing intake step, a full underwriting pass, a 6-flag red flag checklist, a one-page memo format, and a worked example end to end. By the time you finish, you will be able to feed any listing URL into Claude and get a scored, memo-ready verdict back in under 4 minutes.
By the end of this post, you will have a repeatable deal underwriting loop that runs inside Claude, outputs a one-page memo with a clear verdict (proceed / diligence / skip), and scales cleanly from 4 deals a month to 40 deals a week.
Here is what is inside.
Table of contents
Why deal analysis, not deal flow, is the bottleneck
The 5-axis scoring rubric (and the threshold that kills 80% of listings in 10 minutes)
The listing intake step (turning a URL into a structured file Claude can reason over)
The full underwriting pass (the prompt we run on every deal)
The 6 red flags that kill a deal before you sign an NDA
The one-page memo format (thesis, numbers, open questions)
Worked example: a 3-unit building in Valencia at €420k, from URL to verdict
Bonus: the 10-minute morning review workflow (and the
CLAUDE.mdthat runs it)
👀 Before we get into it, a quick heads up: we raise the subscription price every 100 new subscribers.
If you have been thinking about upgrading to premium, now is the moment. Current subscribers lock in today’s rate forever.
After the next 100 subscribers, new subscribers will pay significantly more. No tricks, just a real counter.
The reason? We are working on 100xing the value of this publication. You are going to love what is coming next 🔥
Inside you get:
→ Full Excel investment models (cashflow, ROI, IRR, cap rate, DSCR, sensitivity)
→ Verified prompt libraries for deal analysis, tenant screening, due diligence
→ Country-by-country real estate data source index (refreshed monthly)
→ Every future playbook in this series
💭 Remember!
As a premium subscriber you also get access to every other playbook in this series, such as:
1️⃣ (you are here)
2️⃣ The Complete Real Estate Excel Model with Dashboard (coming next)
3️⃣ 15 Verified Prompts to Analyze Any Real Estate Deal (coming soon)
4️⃣ The Best Claude Connectors for Real Estate Investing (coming soon)
5️⃣ The 72-Hour AI Due Diligence Checklist (coming soon)
6️⃣ The 3,000+ Institutional Real Estate Investor Database (coming soon)
7️⃣ The Tenant Screening Playbook: Master Prompt + Legal Checklist (coming soon)
8️⃣ Real Estate Data Sources by Country — Spain (coming soon)
9️⃣ ROI Calculation Mistakes 80% of Investors Make (coming soon)
🔟 The Institutional Hotel Underwriting & LP Waterfall Model (coming soon)
🗣 Or you can always invite a friend and unlock rewards along the way:
→ 3 friends = 1 month free
→ 5 friends = 3 months free
→ 25 friends = 6 months free
Early investors and operators are already inside.
🚀 Let’s begin!
