How Your Data Powers Fairer Quotes
Last updated: January 2026
Why we collect data
Builders have priced thousands of jobs. You've priced one. That information asymmetry costs homeowners money. We're fixing it.
The more people contribute, the harder it becomes for builders to overcharge.
How it works
1
You tell us about your project
We estimate costs using real data from similar projects in your region
2
You upload builder quotes
We flag overpricing, missing scope items, and show how your quotes compare
3
You share what you paid (optional)
You unlock “What Others Paid” and help the next homeowner get a fairer deal
What we store
| Your input | What we store | Why it matters |
|---|---|---|
| Postcode | District only (e.g., “AL4”) | Regional pricing varies 40%+ across the UK |
| Project details | Type, size, spec level | Accurate estimates need accurate inputs |
| Builder quotes | Anonymised pricing data | Spot overcharging and power community benchmarks |
| Your outcome (optional) | What you actually paid | Helps others avoid overpaying |
Our commitment
Your postcode district is stored, never your full address
Quote details improve our detection of overpricing
Contributed outcomes are anonymised before others see them
We never sell data or contact you for marketing
We never share your data with builders
We never identify you or your property to others
Data retention
| Data type | Retention | Details |
|---|---|---|
| Uploaded documents | 90 days | Auto-deleted after processing |
| Project data | Until you delete | Anonymised in aggregates |
| Contributions | Indefinite | Powers community insights |
| Your account | Until you delete | Full removal on request |
Third-party services
Anthropic Claude (AI)
Extracts data from uploaded quote documents. Processed under Anthropic's API terms.
PropertyData
Provides regional construction pricing benchmarks.
Postcode.io
Validates postcodes and determines your region for pricing adjustments.
Your rights (UK GDPR)
Access your personal data
Correct inaccurate data
Request deletion of your data
Object to processing
Data portability
Withdraw consent at any time
Contact us
For privacy-related inquiries or to exercise your rights, contact us at: info@mybuildally.co.uk