Cost Estimator + Planning By Design

At Cost Estimator, we help builders quote faster and more accurately. But even the best quote can’t move forward if planning permission is missed or mishandled. That’s why we’ve partnered with Planning By Design.

Planning By Design offers fast, affordable architectural design, planning permission services, and structural engineering support. Whether you’re starting a new build, an extension, or a major renovation, they make planning easy, with turnaround times as fast as 1–7 days and clear pricing that beats most competitors.

How Planning By Design Helps You Build Smarter

Fast Planning Appraisals

Find out in just 1 day whether planning permission is needed, which application is best, expected costs, and your likelihood of success—before you waste time or money.

Full Architectural Design

Receive professional drawings for any project or planning application within 7 days—ready to submit without delays.

Planning Permission Experts

From permitted development advice to full planning statements and applications, Planning By Design handles it all—usually delivered within a week.

Building Regulations and Structural Engineering

If your project needs building regulations drawings or structural calculations, they can deliver detailed plans within 2–4 weeks.

Trusted Advice at Lower Cost

30–50% cheaper than competitors, with a price match guarantee. Plus, a simple online cost calculator makes quoting fast and accurate.

Award-Winning Service

Proud winners of Architecture Firm of the Year—two years in a row. Proven results, strong reviews, and a professional team you can trust.

Exclusive Offer for Cost Estimator Users

Cost Estimator users get £20 off every planning appraisal and £100 off any full service—including architectural design, planning applications, and building regulations drawings.

Whether it’s a simple extension or a full new build, Planning By Design helps you move faster, avoid costly mistakes, and build with confidence.