10 Small Kitchen Extension Ideas You’ll Love: Smart, Stylish & Space-Savvy Inspirations from My 10+ Years of Design ExperienceElena HartwellMar 26, 2026Table of Contents1. Open Up with Glass Walls2. Borrow from the Outdoors3. Go Up, Not Out4. Pocket Doors to the Rescue5. Side Return Extensions6. Minimalist Peninsula7. Integrated Dining Bench8. Bring Light In from Above9. Compact Utility Zone10. Open Shelving CornersFAQOnline Room PlannerStop Planning Around Furniture. Start Planning Your SpaceStart designing your room nowLast year, a client asked me if we could fit a six-seater dining table, a full island, and a pantry into her 5x3m kitchen. I almost choked on my coffee—but it sparked one of the most creative project weeks of my career. Small spaces, especially kitchens, really push you to think sideways instead of straight. Today, I’m sharing 10 small kitchen extension ideas I’ve tested and loved, so you can squeeze every drop of potential out of your space.1. Open Up with Glass WallsReplacing a solid wall with a glass sliding door can blur the line between kitchen and garden. It floods the room with light and visually doubles the space. Just mind the cost of custom glazing—worth it if you cook and dine daily.save pin2. Borrow from the OutdoorsI once used a covered patio as a breakfast nook by adding insulated flooring and big bi-folds. It's a cost-friendly way to gain meters without full construction. Tools like room planner can help you visualise this before committing.save pin3. Go Up, Not OutRaising the ceiling or adding skylights gives a small kitchen new volume. Vertical storage, double-stacked cabinets, and hanging pot racks all make use of the space you already have without eating into the garden.save pin4. Pocket Doors to the RescueHinged doors steal precious square footage. Pocket or barn doors can instantly free up movement space, especially in a U-shaped or galley kitchen.save pin5. Side Return ExtensionsThis is a UK favourite for Victorian terraces: extend sideways into that often-wasted alley space. You get extra width for counters or an island but keep the rear garden intact—but do factor in the structural work cost.save pin6. Minimalist PeninsulaIf you dream of an island but lack the depth, try a slim peninsula attached to a wall or cabinet. When planned cleverly in a free floor plan creator, it can work as both prep space and breakfast bar.save pin7. Integrated Dining BenchBanquette seating along one wall is magic in narrow spaces. You can tuck storage under the seat, and the lower profile keeps things airy compared to bulky chairs.save pin8. Bring Light In from AboveRoof lanterns and skylights make even a modest extension feel luxurious. Just watch out for summer heat gain—plan for blinds or UV glass.save pin9. Compact Utility ZoneI once merged a laundry into part of a kitchen extension by using a tall cabinet to hide appliances. Using an kitchen layout planner helped me figure out the right clearances without wasting millimetres.save pin10. Open Shelving CornersSwapping corner cabinets for well-styled open shelving makes a space feel larger and gives your extension immediate character. Just be honest with yourself about dusting and clutter control—it’s not for the messy-at-heart.save pinFAQ1. How much does a small kitchen extension cost?It varies by location, size, and finishes. In the UK, typical ranges are £1,500–£3,000 per square metre according to RICS data.2. Do I need planning permission?Many small extensions fall under permitted development, but always check your local authority rules before building.3. What’s the best layout for a small kitchen extension?L-shaped with an island or galley layouts work well, depending on the width and access points.4. How can I make my small extension feel bigger?Use light colours, reflective surfaces, and plenty of natural light through glazed doors or skylights.5. Is open shelving practical in a kitchen?Yes, if you keep it organised and clean regularly. It's a style choice that works best for curated dishware.6. Can I combine my kitchen extension with a dining area?Absolutely—banquette seating or a peninsula can integrate dining without overwhelming the space.7. Are skylights expensive?They can be, especially with custom sizing. Factor in installation and any needed structural changes.8. What tools can help me plan my extension?There are many online planners; for example, Coohom’s room planner helps create accurate 3D layouts to test ideas before building.Start designing your room nowPlease check with customer service before testing new feature.Online Room PlannerStop Planning Around Furniture. Start Planning Your SpaceStart designing your room now