Double the space — ground floor and first floor in one project.
Double-storey extension planning permission in Jersey.
A double-storey extension adds space on both the ground and first floor, making it the most cost-effective way to significantly increase your home's floor area. We handle planning permission, structural engineering, and Bylaw Plus drawings in-house.
- Free Initial Consultation
- All In-House — No Subcontractors
- Bylaw Plus — Builder-Ready Drawings
- Jersey Only Specialists
- Structural Engineering Included
What's Included
- Free consultation
- Planning drawings
- Planning application management
- Structural engineering
- Bylaw Plus drawings
- Bye-law application
How It Works
Consultation
We assess the site and advise on planning feasibility and design options for the double-storey scheme.
Planning application
We produce the full drawing set and manage the application.
Bylaw Plus drawings
Full construction drawings for both floors including structural, insulation and drainage details.
Planning Note
Double-storey extensions are assessed more carefully by the Planning Department — particularly their impact on neighbouring properties' light and privacy. We design with these constraints in mind from the outset.
Frequently Asked Questions
House Extensions we have taken through planning
Rear Kitchen Extension
“We needed extra space for the family but were worried about overshadowing the plot next door. The drawings were spot on and tackled the privacy issues before the planning officers even had a chance to raise an objection.”
Green Zone Single Dwelling
“Because our property sits in the Green Zone, neighbours told us an extension was out of the question. The team put together a clever design that worked within the Island Plan rules and got it passed.”
Two-Storey Side Extension
“Our side extension was right on the boundary line. The team visited the site, measured everything down to the millimetre, and produced clear drawings that left no room for planning disputes.”
Ready to start your double-storey extension project?
Free initial consultation. We advise on planning, costs, and timescales. Jersey only.