Interest in expanding kitchen spaces is rising as more people seek to expand their properties. This is because they want improved layouts, beautiful designs, natural light in the kitchen, multifunctionality, and additional space. They believe in an “expand, not move” approach. This raises several questions, such as how much time is required to extend a kitchen space. In this blog, we will explore that together and dive into the various factors that shape the kitchen extension.
Average Time Required for Kitchen Extension
The kitchen extension timeline ranges from 2 to 4 months, depending on the scope of work. You need to consider the plan’s stages, estimate the average time for each phase, and sum them to determine the total duration.
Planning and Design Stage
Every extension or construction project starts with design or planning. This step includes the consultation, design drawings, and any planning permissions required if you are subject to a party wall notice. Once you have selected your kitchen builder, the planning phase typically takes 2 to 4 weeks. At this early stage, you are supposed to work with the outworkers and the builders’ company to decide the extension design and safe preparation approval.
Construction Phase
While building an extension, the time period required is from eight to sixteen weeks. For well-organised and excellent quality control, the kitchen extension is done in different steps:
Week 1-2
During this time period, the primary focus is on preparing the site and the foundation. This includes excavation, groundworks, and installation of a drainage system for the firm and a strong base for the extension.
Week 3-6
The extension structure is being completed during this period, covering tasks such as installing windows and doors, brickwork, and the roof frame. This permits the construction to become waterproof.
Week 7-10
At this stage, the task returns to the initial fix stage, which includes:
- Plumbing
- Installation of electrical wiring
- Heating pipework
- Insulation (within floors, ceiling, and walls)
Week 11-14
These weeks are devoted to all the internal work. Tasks such as flooring, plastering, and wall tiling can renovate your kitchen area into a complete, ready-to-finish interior for the ultimate fittings.
Week 15-16
This is the final stage of extending the kitchen that involves the kitchen fit-out. Cabinets, worktop appliances, and accomplishment of snagging items guarantee that the extended place meets the compulsory requirements.
Overall, the extension time is about 12 weeks, whereas 16 weeks are required for complex extensions. The average duration of the full project is typically 4 to 6 months.
Factors Influencing the Kitchen Extension
Several key factors can affect the kitchen extension process. Here is a clear breakdown:
Structural Consideration
If additional structural support, such as an extra wall, is needed, possible changes to ceiling and floor levels, and the current plumbing and electrical systems will increase the project’s difficulty and duration. Plus, modifications to existing plumbing and electrical systems may increase difficulty.
Budget
The budget is a key factor in selecting materials, appliances, size, and the quality of the extension. It is vital to set a budget for any unexpected costs.
Available Space
The size and layout of your kitchen will determine how large an extension you can build, based on your extension requirements.
Timeline
The timeline of the kitchen extension can be affected by the accessibility of contractors, subcontractors, materials, and size. Some projects require planning permission, which may extend the project duration.
How Much Does a Kitchen Extension Cost?
The standard cost for the kitchen extension is about £1,300 to £2,500+. The cost you have to pay for your kitchen extension is this, or nearly close to it. Average cost includes:
- From £19000 to £30,000+ for small extension (e.g., 15-20m2)
- From £26,000 to £90,000+ for medium extension (e.g., 20-24m2)
- From £52,000 to £200,000+ for larger extension (e.g., 30m2)
Conclusion
A kitchen extension is worth the investment because it enhances both the value and functionality of a house. However, achieving this requires thorough, careful preparation and an organised construction plan. By clearly understanding each step, from preconstruction to the final kitchen fit-out, landowners can easily set expectations for time and budget. Typically, a complete kitchen extension takes 4 to 6 months, including planning, design, and quality workmanship. With the right team and schedule, you can meet your kitchen’s extension requirements.

