SundayBuild
Talk to SundayBuild. When you’re ready, you get two things in one subscription: a dated, written plan you can hand to a broker or spouse, and a live dashboard where California rates, your lender shortlist, and the scenarios you care about keep refreshing as your project unfolds. Cancel anytime in one click.
Free + 3 paid tiers · cancel anytime
$0 / forever
The full California construction-finance brain, rate-limited. No card.
Best for
Anyone in California exploring a build or renovation. Get a real recommendation, see the lender shortlist, and access every calculator and topic — for nothing.
Plan & dashboard
Lender intelligence
California knowledge
Chat
from$99/mo
Make the plan persist. Edit one scenario. Export the locked plan.
Best for
A single California project where you want a written plan you can hand to a broker or spouse, plus chat for follow-ups.
Everything in Free, plus:
Plan & dashboard
Scenarios & alerts
Chat
from$199/mo
Up to five strategies side-by-side, with rate-move and lender-change alerts.
Best for
Major renovations, ADUs, additions — anywhere the right answer depends on rates, fees, and timing.
Everything in Basic, plus:
Scenarios & alerts
Lender intelligence
Chat
from$299/mo
Unlimited scenarios + hyper-sensitive alerts for real multi-leg financing.
Best for
Ground-up builds, owner-builders in unincorporated counties, multi-leg stacks where small rate moves make or break the project.
Everything in Deeper, plus:
Scenarios & alerts
Lender intelligence
Chat
Compare every feature
| Feature | Free | Basic | Deeper | Concierge |
|---|---|---|---|---|
| Intake + AI recommendation with rationale | ✓ | ✓ | ✓ | ✓ |
| Live dashboard, weekly refresh | — | ✓ | ✓ | ✓ |
| PDF + AI-handoff export | — | ✓ | ✓ | ✓ |
| Editable scenarios | — | 1 | 5 | Unlimited |
| Rate-move alert threshold | — | — | ≥0.75% | ≥0.25% |
| Custom alert thresholds | — | — | ✓ | ✓ |
| California lender directory, filtered to your project | ✓ | ✓ | ✓ | ✓ |
| Lender-change alerts | — | — | ✓ | ✓ |
| CA rule-update alerts (SB 543, AB 1033, etc.) | — | — | ✓ | ✓ |
| Owner-builder lender alerts | — | — | — | ✓ |
| Financial calculators (CA-specific) | 11 | 11 | 11 | 11 |
| Knowledge-base topics (CA construction & renovation) | 66 | 66 | 66 | 66 |
| Automated weekly knowledge refresh | ✓ | ✓ | ✓ | ✓ |
| Chat allowance / month | ~15 | ~60 | ~200 | ~200 |
| Weekly message limit | ~5 | ~25 | ~80 | ~90 |
How it works
Your subscription is for the dashboard, scenarios, alerts, and lender intel — the things that keep updating for you, week after week. Chat is included on top, with a monthly allowance that scales by tier. If you ever blow through it, you can top up from $25.
What’s the difference between the locked plan and the dashboard?
The locked plan is a dated, written document you keep forever — watermarked “Plan as of [date]” so a broker or spouse can see when it was made. The dashboard is the live workspace that stays active as long as your subscription is active. When you cancel, the dashboard becomes read-only at the end of your billing period; the locked plan is still yours to download anytime.
Is this a loan pre-approval?
No. A SundayBuild Plan is decision-support you bring to a licensed California mortgage broker, lender, or financial advisor. We don’t originate loans, take lender referral fees, or promise any rate or term.
Where do the lenders come from?
Our directory of California construction, HELOC, and renovation lenders — filtered for your county, project type, and contractor status. Every lender name in your plan matches a row in our directory; we don’t invent names, and we have no financial relationship with any lender listed.
How does cancellation work?
One click in the customer portal. Your subscription continues through the end of the period you’ve already paid for, then access ends. No phone call, no cancellation fee, no “are you sure” runaround. Required by California Auto-Renewal Law and we wouldn’t do it any other way.
What’s the refund policy?
Monthly:cancel anytime, in one click. The month you’re in runs through to the end — that’s the only commitment, and there’s no pro-rating either way. Annual:cancel anytime, in one click. If you change your mind in the first 14 days and you’ve sent fewer than 10 advisor messages and haven’t downloaded the broker export package, you get a full refund. After that, your access runs through the end of your paid year — same as monthly, just longer.
What happens to my locked plan if I cancel?
You keep it. Your PDF and the AI-handoff copy (paste-into-ChatGPT-or-Claude version) are yours forever. Your plan stops updating and becomes read-only at the end of your paid period; the locked PDF remains downloadable.
Does this work outside California?
Not yet. The regulatory, permit, and cost landscape is California-specific, and so is the lender directory. Coverage expansion isn’t on the near-term roadmap.
How do I start?
Complete the intake on the home page, have a real conversation with SundayBuild, then click “Generate my plan” when you’re ready.
SundayBuild is not a mortgage broker, lender, financial advisor, or licensed real estate professional. Plans are for educational and decision-support purposes only and do not constitute a loan offer, pre-approval, financial advice, or a solicitation to make a loan. Rates, terms, and product availability change frequently and vary by lender and borrower. SundayBuild subscriptions auto-renew at the end of each billing period at the price shown above. Cancel anytime in the customer portal — access continues through the end of the period you’ve paid for. Annual subscriptions: 14-day refund window subject to usage thresholds disclosed above.