A single-story extension is one of the most efficient and popular ways to expand your living space, whether you are looking to create a sprawling open-plan kitchen-diner, a dedicated home office, a cozy lounge, or an extra utility room.
If you are planning or researching a single-story extension project with AAS Construction, here is a comprehensive guide covering what to consider, the process, and key design options to discuss with their team.
Key Phases of a Single-Story Extension Project
Initial Consultation & Design BlueprintDiscuss your spatial requirements, budget, and lifestyle needs with AAS Construction.Review architectural drawings, structural layouts, and how the extension will connect with your home's existing footprint.
Planning Permission & Building Regulations
Permitted Development (PD): Many single-story rear or side extensions fall under permitted development rights (subject to specific depth, height, and boundary limits).
Prior Approval / Full Planning: If your extension exceeds standard PD limits, local authority planning permission will be required.
Building Control: Ensuring structural integrity, insulation, fire safety, and damp-proofing compliance.
Party Wall Agreements: Necessary if your extension involves shared boundaries or walls with neighbors.
Groundworks & Structural BuildSite clearance, excavation, and pouring robust foundations.Constructing external walls (matching existing brickwork or utilizing contrasting modern cladding).Installing roof supports (flat roof with skylights, pitched roof, or vaulted ceilings).
Fit-Out & Finishing TouchesFirst and second-fix electrical wiring, plumbing, and heating (e.g., underfloor heating).Plastering, flooring, window/door installation (such as bi-folds or sliding glass panels), and final interior decor.
Popular Design Options to Consider
Open-Plan Rear Extension: Maximizes garden views and creates a bright social hub combining kitchen, dining, and family living spaces.
Side-Return Extension: Cleverly utilizes narrow or wasted alleyway space alongside Victorian or period properties to widen internal rooms.
Flat Roof with Skylights / Roof Lanterns: Floods the core of the new room with natural daylight while maintaining a sleek, modern exterior profile.
Vaulted Ceilings with Pitched Roofs: Adds dramatic vertical height and a sense of volume to single-story structures.
