Design.
Calculate.
Construct.
Simplified structural engineering and architectural design. We handle the council, the calculations, and the complexity.
10+ happy homeowners
What We Do
Our Expertise
Comprehensive engineering and design services tailored for UK homeowners.
Structural Design
Beams, extensions, loft conversions, load calculations.
Architectural Design
Floor plans, 2D/3D drawings, elevation design.
Structural Survey
Site inspection, defect report, condition assessment.
Council Application
Planning application package, building control submission.
Start Your Journey
Select the service that best matches your needs. If you're unsure, 'General Advice' is a great starting point.
Most extensions require both Structural Calculations AND Architectural Drawings.
Why leading developers choose Cosmic Design Plus
We combine technical precision with practical design solutions to ensure your project moves smoothly from concept to construction.
Licensed Pros
Chartered engineers (MIStructE/MICE).
Fast Turnaround
Calcs delivered in 24-48 hours.
Council Approval
High success rate with Planning.
Fixed Pricing
No hidden fees for residential work.
The Workflow
Your Journey to Approval
From the first sketch to the final brick, we manage the technical details.
Instant Quote
Use our AI dashboard to get an instant cost estimate & roadmap.
Site Survey
We visit your property to take laser measurements.
Design & Calcs
Architectural drawings and detailed structural calculations.
Council Application
We submit your plans to Planning & Building Control.
Approval
Receive your stamped approval documents. Ready to build.
Instant Quote
Use our AI dashboard to get an instant cost estimate & roadmap.
Site Survey
We visit your property to take laser measurements.
Design & Calcs
Architectural drawings and detailed structural calculations.
Council Application
We submit your plans to Planning & Building Control.
Approval
Receive your stamped approval documents. Ready to build.
Portfolio
Recent Transformations
Demolition in a conservation area
The Design and Access Statement accompanies a planning application for consent ofdisplay advertisement at The Monument Garage, Bigby Road, Brigg, DN20 8HH.
Rear Conservatory
The construction of a 4m × 5.75m conservatory at the rear of the dwelling, designed as an extension to the ground floor living area. The conservatory will feature a uPVC window to enhance natural light and create an inviting family living space.
Upgrading the exterior front area of a shop
A P Harvey Wines, located at 47 Earlsdon Street in Coventry’s historic Earlsdon district, proposes sensitive, high-quality design improvements that respect and enhance the site’s historic context.
Frequently Asked Questions
How long does structural design take?▼
For standard residential projects like wall removals or extensions, we typically deliver calculations within 2-5 working days after the site visit.
What documents do UK councils require?▼
Typically, you need architectural drawings (plans/elevations) for Planning Permission, and structural calculations plus detailed specs for Building Control approval.
Do you visit the property?▼
Yes, we conduct a site visit to verify measurements and assess ground conditions before finalizing any structural design.
How much does council approval cost?▼
Council fees vary by location and project type. Planning usually costs around £200-£300, while Building Control varies based on works cost, typically £300-£900.
Ready to start your project?
Skip the confusion. Get a clear engineering plan and a fixed quote today.
Available for next-day site visits