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Estimate Retail Construction Instantly
Full deal analysis & pro forma included
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Full deal analysis & pro forma included
Enter your mobile number to login
By signing up you agree to our and .
Effective May 2026
By creating an account or using Back of the Napkin (“Service,” “NAP,” “we,” “us”), you (“User”) accept and agree to be bound by these Terms of Service (“Terms”). If you do not agree, do not use the Service.
Back of the Napkin provides automated rough-order-of-magnitude (“ROM”) construction cost estimates, financial pro formas, deal analysis packages, and related documents for retail and restaurant commercial real estate spaces. All outputs are generated algorithmically from user-supplied inputs and publicly available cost data.
All estimates, pro formas, cost figures, space programs, and documents produced by NAP are ROM approximations intended solely to support early-stage deal decision-making. They are NOT: (a) licensed contractor bids; (b) licensed architect, engineer, or designer drawings or specifications; (c) legal advice or licensed real estate brokerage services; (d) certified financial analysis or investment advice.
ALL OUTPUTS REQUIRE INDEPENDENT REVIEW BY QUALIFIED, LICENSED PROFESSIONALS BEFORE BEING RELIED UPON FOR ANY COMMERCIAL, FINANCIAL, OR LEGAL PURPOSE.
The intent of the Service is to provide a rough order of magnitude to enable informed decision-making around a deal and deal terms — specifically: (a) whether to pursue a commercial lease negotiation, (b) what TI allowance to request, (c) whether projected economics support a concept, and (d) what scope of work is typical for a given use type and square footage. No warranty is made that any output will match actual contractor bids, actual construction costs, or actual lease economics.
TO THE MAXIMUM EXTENT PERMITTED BY LAW: (A) NAP SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING FROM YOUR USE OF, OR RELIANCE ON, ANY SERVICE OUTPUT; (B) NAP’S TOTAL CUMULATIVE LIABILITY FOR ANY CLAIM ARISING OUT OF OR RELATED TO THESE TERMS OR THE SERVICE SHALL NOT EXCEED THE AMOUNT ACTUALLY PAID BY YOU FOR THE SPECIFIC ESTIMATE OR DEAL PACKAGE GIVING RISE TO THE CLAIM (TYPICALLY $9.99–$24.99); (C) NAP IS NOT LIABLE FOR ANY INCONSISTENCY BETWEEN SERVICE OUTPUTS AND ACTUAL CONTRACTOR BIDS, SUBCONTRACTOR PRICING, MATERIAL COSTS, LABOR RATES, PERMIT FEES, OR LEASE TERMS NEGOTIATED BY ANY PARTY.
ANY DISPUTE, CLAIM, OR CONTROVERSY ARISING OUT OF OR RELATING TO THESE TERMS OR THE SERVICE SHALL BE RESOLVED EXCLUSIVELY BY BINDING ARBITRATION ADMINISTERED BY THE AMERICAN ARBITRATION ASSOCIATION UNDER ITS CONSUMER ARBITRATION RULES. YOU WAIVE ANY RIGHT TO A JURY TRIAL AND ANY RIGHT TO PARTICIPATE IN A CLASS ACTION, CLASS ARBITRATION, OR REPRESENTATIVE PROCEEDING.
You agree not to initiate, join, or participate in any lawsuit or litigation in any court against NAP for any claim covered by these Terms. Arbitration is your sole and exclusive remedy. Arbitration shall take place in the county of your residence or, at NAP’s election, by video conference.
(a) NAP owns and retains all rights in the platform, algorithms, estimate engine, financial models, and all aggregate or anonymized outputs derived from Service usage. (b) You retain ownership of the raw input data you provide. You grant NAP a perpetual, royalty-free, worldwide license to use your anonymized input data to improve the Service. (c) Generated documents downloaded or emailed to you are licensed for your personal and business use; you may not resell them as standalone products.
By creating an account, you agree to receive transactional emails from NAP including deal package deliveries, account notifications, and product updates. You may opt out of non-transactional emails at any time via your Account page.
NAP may update these Terms at any time. Continued use of the Service after notice of changes constitutes acceptance. Material changes will be communicated via email or in-app notice.
These Terms are governed by the laws of the State of California without regard to its conflict-of-law provisions.
Effective May 2026
We collect: (a) Phone number (E.164 format) — required for authentication via SMS OTP; (b) Email address — optional, provided by you in Account settings or deal delivery; (c) Name and company name — optional; (d) Deal inputs — square footage, use type, market, estimated costs, pro forma parameters; (e) Usage data — timestamps, page visits, deal generation events; (f) IP address for rate limiting (not stored beyond the session).
(a) To provide the Service — run estimates, generate packages, send deal emails; (b) To improve the Service — aggregate usage patterns, estimate accuracy benchmarks; (c) To communicate with you — transactional emails (deal packages, OTP codes), product updates; (d) To enforce our Terms and prevent abuse.
Back of the Napkin does NOT sell your personal information — name, phone number, email address, or individual deal records — to third parties for their independent marketing or advertising purposes.
NAP may compile, aggregate, and anonymize deal and usage data — removing all personally identifiable information — and may license or sell such anonymized datasets to real estate research firms, construction data providers, market analysts, and similar parties. Anonymized data cannot reasonably be used to identify you.
If you explicitly opt in via your Account page, Back of the Napkin may share your deal data — including deal inputs, market, square footage, use type, and general location — with pre-qualified third parties such as general contractors, specialty subcontractors, material suppliers, and commercial real estate service providers, for the purpose of: (a) improving estimate accuracy with real bid data relevant to your market; (b) facilitating your bidding process by connecting you with qualified vendors. You may revoke this opt-in at any time from your Account page. Revocation is prospective only.
Deal records and account data are retained for the life of your account plus 12 months after account closure. You may request deletion by emailing privacy@backofthenapkin.app.
Data is encrypted in transit (TLS 1.2+) and at rest (AES-256 via AWS). Authentication uses SMS OTP with short-lived JWT tokens. No security system is perfect; we cannot guarantee absolute security.
NAP uses a single session cookie (JWT) for authentication. We do not use third-party advertising cookies, tracking pixels, or cross-site tracking technologies.
The Service is not directed to individuals under 18. We do not knowingly collect data from minors.
Depending on your jurisdiction, you may have rights to access, correct, or delete your personal data. Contact privacy@backofthenapkin.app to exercise these rights.
privacy@backofthenapkin.app · hello@backofthenapkin.app