BY COLLINGHAMCO
Why You Need a Car Build Log: The Case for Documenting Every Mod
You've spent thousands on your build. But can you prove it? Here's why documenting every mod could add 20-40% to your car's resale value — and how to start.
The Problem
You've spent £8,000 on your car. New suspension, engine work, wheels, exhaust, turbo. Every penny gone into making it faster, louder, meaner.
But when a buyer asks: "What's actually been done to it?"
You scroll through old photos on your phone. You dig through emails for invoices. You can't quite remember which suspension parts you fitted. Was the turbo a Garrett or Precision? When was the last service?
You lose money. Lots of it. Because nobody believes you.
What a Build Log Does
1. Proof of Spend
Every receipt. Every date. Every supplier. You're not claiming £15k in mods — you're proving it.
2. Build History Transfer
When the car changes hands, the new owner gets the full documented history. They see what's been done, why it was done, and who did it. Trust is built instantly.
3. Insurance Evidence
Modified cars need modified insurance. Your build log is evidence for your insurer. "Yes, this car has 400hp. Here's the documentation."
4. Resale Value: +20–40%
Documented builds sell faster and for more. Buyers are willing to pay premium prices when they have proof of every modification. A £10,000 build log might add £4,000 to your asking price.
What to Track
- Part name — What was fitted?
- Category — Wheels, suspension, engine, etc.
- Cost — The actual price paid
- Date fitted — When was it installed?
- Supplier — Who did you buy from?
- Notes — Why did you choose this part? Performance gains? Issues?
- Photos — Before/after shots matter
Real Example: Porsche 986 Boxster
One MODLOG builder documented 92 modifications on a Boxster over 3 years:
- Total spend: £7,658.85
- Mods logged: 92
- Categories: Suspension (24), Exterior (18), Engine (15), Interior (12), Other (23)
- Resale impact: +£2,000–£3,000 in negotiations
Start Documenting Today
You don't need a perfect car or a pristine build. You just need to start logging. MODLOG is free to begin — no credit card, no commitment. Your future self (and your future buyer) will thank you.
