Single-Storey Extensions Designed, Planned and Delivered by Nett Assets

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A professionally designed single-storey extension can transform your home, create light-filled spaces and increase property value. At Nett Assets, we specialise in delivering tailored, compliant and high-quality extensions, from first concepts and design through to planning and construction. Whether you are considering a modern single storey extension or a single storey kitchen extension, our experienced team provides clear guidance, realistic cost insights and exceptional design.

Modern single-storey rear extension on a traditional red brick UK home featuring floor-to-ceiling sliding glass doors, light grey rendered walls, and a flat roof. The extension opens onto a manicured lawn with a wooden fence visible in the background.

Modern Single Storey Extension Solutions

Well-designed extensions improve everyday living. Our approach to single storey extension design prioritises:

  • Seamless integration with your existing property
  • Maximum natural light and garden connectivity
  • Practical layouts for modern living
  • Material quality that feels contemporary and timeless

Our designs consider character, context and future use so every extension feels like a natural part of your home.

Understanding Single Storey Extension Cost

One of the first questions homeowners ask is about single storey extension cost. Prices vary depending on:

  • Extension size and footprint
  • Structural requirements and ground conditions
  • Specifications (glazing, finishes and insulation levels)
  • Roof type and energy performance targets

We assess your needs early and provide transparent cost guidance so you can budget with confidence before detailed design work begins.

Contemporary two-storey detached home with pale cream rendered exterior walls and a grey slate-effect pitched roof. The symmetrical front facade includes a recessed entrance porch with a black front door, grey-framed windows on both levels, a small front patio area, and is set within a lawn garden enclosed by timber fencing.

Expert-Led Single Storey Extension Design

Great design makes a space feel larger, brighter and more usable. Whether you are inspired by contemporary layouts or exploring single storey extension ideas, we help you:

  • Refine inspiration into a practical, compliant design
  • Improve internal layout and circulation
  • Maximise daylight with thoughtful window and rooflight placement
  • Prepare planning-ready drawings

Our focus is on design quality, usability and buildability.

Modern two-storey contemporary house with grey render, large glass windows and timber cladding exterior design.

Planning Permission and Regulations

Understanding single storey extension planning permission is essential before starting. Some extensions fall under permitted development, but others require full planning approval. We help you determine which route applies and manage:

  • Planning application submissions
  • Neighbourhood consultation (where needed)
  • Amendments and resubmissions

All designs comply with single storey extension regulations, including building control requirements for structure, insulation, fire safety and drainage.

Modern UK two-storey white house with pitched roof, rear extension and balcony design, typical of contemporary home renovations requiring planning permission approval.

Roof Options for Single Storey Extensions

The single storey extension roof is a defining element of your project. Options include:

  • Flat roofs with rooflights or lanterns (ideal for modern aesthetics)
  • Pitched roofs (suitable for traditional contexts)
  • Hybrid solutions tailored to context and planning

We guide you on roof design, thermal performance and detailing that supports your long-term comfort and compliance.

Modern single storey extension with flat roof and rooflight, featuring large sliding glass doors opening onto a landscaped garden and patio area

Single Storey Kitchen Extensions

A single storey kitchen extension not only expands your home, it enhances how you live. Our kitchen extensions are designed to:

  • Improve flow between cooking, dining and living zones
  • Connect indoor space with outdoor areas
  • Deliver natural light and ventilation
  • Support modern family living

We create practical, beautiful spaces that elevate everyday life.

Modern single storey kitchen extension with minimalist white cabinetry, central island and large sliding glass doors opening onto a garden.

Small Single Storey Extensions That Deliver

Limited space should not limit impact. A small single storey extension can still provide meaningful benefits:

  • Better circulation or storage
  • Expanded utility or dining space
  • Brighter interior with improved daylight

We maximise every square metre to ensure value and usability.

Small modern single storey rear extension with flat roof, large sliding glass doors and timber cladding, typical of contemporary UK home extension design.

Frequently Asked Questions

Costs vary by size, specification, structural requirements and finishes. Typical ranges for UK projects are between £1,800 and £3,000 per square metre, but Nett Assets will provide tailored cost guidance early in the process.

Not always. Many rear single-storey extensions can be delivered under permitted development, but this depends on size, neighbours and planning constraints. We assess your project and manage permissions where required.

All extensions must comply with UK building regulations covering structural safety, insulation, drainage, ventilation and fire safety. Nett Assets ensures full compliance and prepares documentation for building control approval.

The best design responds to your home’s layout, improves flow, maximises light and aligns with planning and building requirements. We create bespoke designs to meet these needs.

Options include flat roofs, rooflights or lanterns and pitched roofs. The choice depends on style, planning constraints and performance. We advise on the right solution for your project.