Trimble Architects

RIBA Architectural Services

Phone Number: 020 8538 9303

Mobile Number: 07785711635

How Long Does a Two-Storey Extension Take

  • Posted by:
  • Admin
  • Tags:
  • Two Storey Extension Timeline, Home Extension Duration, Building Extension Timeframe, Construction Time Two Storey, Extension Project Length
  • Posted date:
  • 18-08-2024
How Long Does a Two-Storey Extension Take

Curious about how long a 2-storey extension takes? The timeline for building a two-storey extension typically ranges from 3 to 6 months, depending on factors like design complexity, planning approval, and construction phases. 

This guide breaks down the stages of the process, from planning and permits to building and finishing touches. Learn how to manage your project efficiently and what to expect at each stage to ensure a smooth and timely completion.

What is a Double-Storey Extension?

A double-storey extension is an addition to your home that adds two levels of extra space. These extensions are popular among homeowners who need more room but don't want to move house. Typically, a double-storey extension includes rooms on both the ground floor and the first floor. This could mean an extra bedroom and bathroom upstairs and possibly an extended kitchen or living room downstairs.

Building an extension like this can make a significant difference to your home’s appearance and functionality. It’s an excellent way of making your existing house meet your current needs. Whether you have a growing family or you simply want more space, a double-storey extension offers a practical and often cost-effective solution. In addition to providing more living space, a double-storey extension can also add value to your property.

By enhancing both the aesthetic appeal and the functionality of your home, you are likely to see an increase in its market value. This is particularly beneficial if you plan to sell your property in the future. Furthermore, a double-storey extension allows for greater flexibility in the design and use of space. You can tailor the extension to suit your specific requirements, whether it's creating a home office, a playroom for the children, or a guest suite.

How Long Does a Double-Storey Extension Take to Build?

The construction time for a double-storey extension can vary depending on several factors. Generally, you can expect the building work to take between three to six months. Some extensions might take a shorter time to complete, especially if the plans are straightforward and there are no unexpected issues. The complexity of the design plays a significant role. Simple designs with easy access to the build site can be completed quicker than more intricate plans requiring special materials or construction methods.

The size of the extension will impact the length of time needed too. Larger projects with multiple rooms and bathrooms will naturally take longer. Additionally, the weather can influence the timeline. Construction often slows during very cold or wet periods. You should also consider the availability of your builder. 

Good quality builders often have schedules booked months in advance, which could delay your project from starting. It is essential to keep the following in mind: Site preparation typically takes two weeks. Drawing or getting plans approved may take around four to eight weeks. The main building work, including foundations, structure, and roofing, could take eight to twelve weeks.

Finishing work, such as plastering, flooring, and fittings, might require an additional four weeks. Do not forget to add some buffer time for unexpected delays. Discuss your timeline expectations openly with your builders at the start to get a clearer view of how long your double-storey extension will take to build. 

The complexity of the design plays a significant role. Simple designs with easy access to the building site can be completed quicker than more intricate plans requiring special materials or construction methods. The size of the extension will impact the length of time needed too. 

Larger projects with multiple rooms and bathrooms will naturally take longer. Additionally, the weather can influence the timeline. Construction often slows during very cold or wet periods. You should also consider the availability of your builder. Good quality builders often have schedules booked months in advance, which could delay your project from starting.

How Long Does A 2 Storey Extension Take?

Two-Storey Extension Planning Permission

Planning permission is often required for a two-storey extension. The rules vary depending on your local council and the size and purpose of your extension. For instance, if the extension will significantly change the look of your house or if it impacts your neighbours, you’ll likely need permission.

Some smaller extensions may fall under "permitted development" rights, meaning you don't need full planning permission. However, it’s crucial to confirm this with your local authority. Even if your project falls under permitted development, you must still comply with building regulations.

Getting planning permission usually involves submitting detailed plans and designs to your local council. These should be prepared by a qualified architect. Once submitted, the process generally takes about 8 weeks, but it can be longer if there are objections or complications.

A party wall agreement may also be required if your extension will be built close to your neighbours' property. This agreement is designed to prevent disputes and ensures that any building work does not adversely affect neighbouring properties.

Will This Type of Home Extension Add Value?

A double-storey extension can significantly increase the value of your home. By adding more living space, you make your property more attractive to potential buyers. In many areas, the value added can be higher than the cost of the build, making it a worthwhile investment. Extra bedrooms and bathrooms are highly sought after. For example, adding a new master bedroom with an en-suite bathroom can make your house more appealing.

Extending the kitchen or living space on the ground floor also contributes to the overall value. However, the exact increase in value will depend on several factors. The quality of the build is crucial, as a well-executed extension can seamlessly blend with your existing property and enhance its overall aesthetics. 

The size and design of the extension also play a significant role; a thoughtfully designed space that maximises functionality and natural light can attract more interest. The location of your property and local market conditions are equally important, as property values vary widely depending on these factors.

It’s always a good idea to consult with local estate agents to get an idea of how much value a double-storey extension can add to your specific property. They can provide insights based on recent sales of similar homes in your area. While a double-storey extension can be costly, the investment is usually worth it. Not only do you gain additional space and comfort, but you also stand to benefit financially if you decide to sell your home in the future. This makes a double-storey extension a smart choice for homeowners looking to enhance their living experience and increase their property’s market value.

Will This Type of Home Extension Add Value?

Double-Storey Extension Ideas

Designing a double-storey extension can greatly enhance both the functionality and value of your home. One compelling option is adding a new kitchen on the ground floor, with a master bedroom and en-suite bathroom upstairs. This layout is practical and can significantly increase your home’s appeal and value. 

Another idea is to use the ground floor to create a larger living room or dining area. Open-plan living spaces are particularly fashionable and can make your home feel more expansive. Upstairs, you might add extra bedrooms or a study.

Additional bedrooms are always an attractive feature, particularly for growing families. When planning your extension, it is crucial to consider the style and look of your existing house. The new build should harmonise with the old, both in terms of design and materials. For instance, matching the brickwork or roof tiles can make the extension appear as a natural part of your home, rather than an add-on. 

Think about the future use of the new space. Will it meet your needs in years to come? Flexible rooms that can be adapted for different purposes might be a wise choice. This strategy ensures that your extension remains functional as your family’s needs change over time. It is also advisable to consult with an architect. They can offer innovative and practical ideas. Architects can help you draw up plans that comply with all building regulations and make the most of your available space. Their expertise can be invaluable in creating a design that is both beautiful and practical.

Lastly, remember to consider aspects like natural light and ventilation in your design. Large windows and well-placed doors can make the space feel airy and welcoming. Thoughtful planning in these areas can improve the comfort and enjoyment of your new extension. In summary, a well-planned double-storey extension can add significant value and functionality to your home. From practical layouts to future-proof designs, there are many ways to ensure that your extension will serve you well for years to come.

Our team are on hand to discuss your two storey extension. Find out more via the link below.