How Long Does A Loft Conversion Take

by | Oct 27, 2022 | Loft Conversion | 0 comments

Do you know how long does a loft conversion take? If not, then this article is for you. Modifications can take between four and ten weeks, depending on the type.

It is easier to provide an exact figure by knowing the intricate details of the construction. The type of window you choose, the type of staircase you use, the type of flooring you have to choose from, and even the type of fittings you need will depend on your needs. You should be very suspicious if a loft conversion company is willing to give you a timeframe without knowing all the details.

The Three Phases of conversion

If you are searching for how long a loft conversion take, keep in mind its phases. It is important to follow three main stages when completing a loft conversion so that it runs smoothly and looks as you imagined. Any disruption to one of these phases could cause the installation process to be severely delayed and could increase the overall installation time.


You will have a loft conversion designed thoroughly to achieve the dream you have always wanted. You can make adjustments based on your needs and requirements by reviewing blueprints and architectural drawings once the conversion is completed.

It is necessary to have a drawing of the outside of your house if your conversion will change its structure. You will need this not only for any planning permission you apply but also to understand what to expect from the conversion. Based on the blueprints created, the team will assist you with completing the necessary planning permission forms.

An interior design of the room will be included in your blueprints, including where fixtures and features should be placed. The fixtures in a bathroom can be chosen if you convert a room into a primary bedroom with an ensuite.


The timeframe for the completion of the project is not definitive, so we cannot give a standard estimate. Obtaining planning permission from your local authority is one of the steps in the installation process, as is purchasing materials and products.
You will be able to get planning permission easier by following the design process, as the team will take care of every aspect before enquiring about it. Hence, the planning process will take less time as a result. You can expect this phase to take around six months if you hire a professional loft conversion team.


After your local authority approves your project, all the necessary materials and products will be delivered to the constructor, who will begin the conversion process. Before installing electrical, plumbing, and plastering work inside, the team will finish the roof and complete any exterior work.

It may take longer to build a loft conversion, depending on your conversion type. Dormer and Velux loft conversions will likely take less time than hip-to-gable conversions. To give you a better idea of how long the conversion process will take, a member of the conversion team will inform you before the function begins and if not, make sure you ask yourself.

Process Timelines

Loft conversion timeframes vary from 3 weeks to 8 weeks, depending on the loft conversion process. Nonetheless, it should be emphasised that there is no uniformity here and that each project will undoubtedly vary.

The first and second weeks are dedicated to preparing all equipment and materials for work. A hole in the top is often drilled so workers can reach inside and outside your home without disturbing you, resulting in the support work for the roof and new design.

The flooring, insulation, and any necessary stud walls will be installed during weeks 3 and 4. The work outside of more superficial conversions, such as roof lights and dormers, will wind down in these weeks, and you will probably see that finishing touches are applied to many simple modifications.

5 – 7 – If your conversion process takes longer, you’ll need to install a staircase before you can access your loft. In the meantime, plastering, electrical work, plumbing, and other design elements are being taken care of. It’s just a matter of decorating now!

What determines how long a loft conversion will take?

Once you know how long a loft conversion takes, now is the time to determine factors or loft conversion stages influencing the transformation. The factors affecting loft conversion timescales need to be considered first to determine how long the conversion will take. Have you ever heard that loft conversion comes in a variety of types? These loft conversions have different timeframes, such as dormers, Veluxes, roof lights, hip-to-gables, or mansards. It would help if you also considered the following factors when estimating the time it will take for your loft conversion:

Condition of loft

To be code compliant, you will need to wait longer if your loft is in poor condition.


There will be a longer conversion process for a large loft.


In some cases, the time needed for your conversion may be increased if you want it to be done in a particular way. Adding furniture and decorating your loft will take more time than just converting the loft.

How long does a Velux loft conversion take?

With a Velux loft conversion, you can let the sun stream into your loft through Velux roof light windows. You can maximise natural light and ventilation in your home by positioning these windows on the roof’s pitch. Do Velux loft conversions take long? So, the Velux loft conversion estimate time is 4 – 6 weeks.

How long does a simple loft conversion take?

The loft conversion process depends on what type of conversion you demand. You can spend little time and money on a loft conversion. It can save time and money if you carry out a simple loft conversion. The condition of your loft may prevent this from taking place in all cases. Simple loft conversions take less than six weeks, similar to Velux conversions.

How long does a dormer loft conversion take?

In the case of dormer loft conversion, you might get stressed over how long does a loft conversion takes. You can add more space to your loft conversion with dormer windows, not only because they look beautiful. Adding a window seat to a dormer loft conversion gives you spectacular views, especially if you install the square structure on a pitched roof. As it is a complex conversion, it will take longer than usual. What is the average time frame for a dormer loft conversion? Work will take about 10 – 12 weeks, a little longer than a Velux conversion.

When does a loft conversion require planning permission?

Despite its popularity, only some loft conversions require planning permission, which is surprising to many. Permitted development may apply to your loft conversion, depending on the extent of your plans. However, you will need a planning permit if you plan to extend your roof or make structural changes to it. Planning permission is required in case of conversions, so it’s essential to get it before converting anything. Planning permission can take up to 13 weeks for complex or large projects but less than eight weeks for more simple conversions.


A little planning and creative thinking can transform your home from the ordinary to the extraordinary, enhancing your quality of life and improving the aesthetic appeal of your home. No matter your specific accommodation requirements, a beautifully-designed loft conversion could be the perfect answer. A loft conversion timeframes vary by the type of conversion and size of the loft. You need to know what stage the project is at and what type of loft conversion you are contemplating. It will be beneficial in predicting how long a loft conversion will take. Most of the time, the estimate of four to eight weeks is accurate. However, projects of greater scope and complexity may take longer than this.


10 + 8 =

Emmanuel Nwaebo

Emmanuel Nwaebo is the Managing Director at Powerpillar Ltd and has more than 25 years experience in building construction and renovations. He has a bachelor’s in Electronics and Electrical Engineering with certification in Construction Health and Safety Technician (CHST). With an experience in managing construction and renovation services for years, he is extremely passionate about property management and loves helping people find their dream property.

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