How long does an attic conversion take?

Author: Martin Gerlach  |  Last update: Sunday, December 28, 2025

The average attic conversion time frame can be anywhere between three and five months depending on how long the different stages of the process take.

How long does it take to do an attic conversion?

A standard three bed semi detached attic conversion will take approximately two weeks, 10 working days, if you like an en-suite it would take an extra 3-4 working days. Do I need planning permission? You do not need planning permission for an attic conversion because its non-habital quarter.

How long does an attic renovation take?

Transforming your attic is a great way to add value to your home and get some extra space in the form of a bonus room. Just remember, it's a process that takes time (usually 3 to 5 months) depending on various factors. But with some good planning and the right team, you'll be enjoying your new space before you know it!

How long does a loft conversion take to complete?

The timeline to complete loft conversions depends on multiple variables, including project size, type of conversions, and challenges faced during conversions. However, on average, a project can be completed in 6–12 weeks. The entire process of loft conversion is divided into different stages.

How much does an attic conversion cost?

On average, a basic loft conversion for 20m2 (215.3 square feet) can start from around £20,000 to £30,000, while more extensive and luxurious conversions can cost upwards of £50,000 or more. A well-executed loft conversion can significantly enhance a property's value, typically adding between 20% and 25%.

How Long Does A Loft Conversion Take?

What is the 7 and 7 rule for attics?

This rule means, at least half of your attic space must be 7 feet high by 7 feet wide, with a total of 70 square feet. Keep in mind, codes vary from place to place, but for using the attic as an actual room, this rule typically applies.

Do I need a permit to turn my attic into a room?

Reach out to your local municipality to see if you need a permit for your attic remodel. A permit is usually only needed if: You are adding electrical wiring or ventilation. You plan to change the structure of your home in the process, such as knocking down an existing wall or adding a dormer.

What are the disadvantages of loft conversions?

Disadvantages of adding a loft conversion
  • A good loft conversion is dependent on roof space.
  • Space use is limited due to sloped ceilings.
  • Natural light can be limited.
  • Loft conversions can cause more disruption than extensions.

Can you live in a house during a loft conversion?

If you want to stay in your home during a loft conversion, we say it's perfectly possible.

Will a loft conversion add value?

Increases property value: Adding a loft conversion can increase the value of your home by 20% typically. This provides a good return on investment if you ever sell. Makes better use of wasted space: Most lofts are just used for storage. Converting it allows you to get more practical use out of the space.

Is an attic conversion worth it?

Yes, a loft conversion can increase your property's value by up to 20%, add functional living space, and improve energy efficiency, making it a smart long-term investment.

How to afford an attic conversion?

The best ways to cover loft conversion costs
  1. Fund your loft conversion by saving up cash reserves. ...
  2. Using a secured loan to fund your loft conversion. ...
  3. Take out an unsecured loan to cover loft conversion costs. ...
  4. Making loft conversion payments using a credit card. ...
  5. Remortgaging your home to fund your loft conversion.

Does attic conversion add value to house?

So how much value does an attic conversion add? The data shows it can provide a remarkable return on investment of 50-80% or more in added property value. But an attic conversion brings more than just financial value.

Do you need permission to convert an attic?

A loft conversion for your house is considered to be permitted development, not requiring an application for planning permission, provided certain limits and conditions are met.

Which is cheaper attic conversion or extension?

First things first, loft conversions tend to be cheaper to carry out than extensions in general which can make them a more alluring prospect if you're on a budget or if you're planning on gradually renovating various areas of your home gradually.

Why does a loft conversion cost so much?

This is for a number of reasons such as the contractors you use will likely charge more and transporting materials can also be a challenge. However, as with any loft conversation, to to get an accurate idea of the costs involved, you should approach firms in your area, book a consultation and get a quote.

Which lofts cannot be converted?

Moreover, houses built during or after the 1960s may have trussed roofs, which are characterised by their 'W' shaped frames that support both the roof and the floor. These trusses are not designed with loft conversion in mind, as altering them is a complex process that requires replacement with sturdier supports.

How messy is a loft conversion?

You do get some dust but we sealed the doors of rooms we don't use everyday and the ones we do split plastic sheets over them and keeping the doors closed kept the dust at bay. Also getting a good clean (post building work clean) at the end is worth it.

How much does loft conversion cost?

A basic loft conversion cost in the UK typically starts from around £20,000 to £30,000. However, more complex conversions or those with higher-end finishes can cost upwards of £40,000 to £50,000 or more.

What is the most expensive part of a loft conversion?

However, it's important to remember that it can be a significant investment as well. While there are many factors that can contribute to the cost of a loft conversion, it's clear that the most expensive part is often the construction work itself.

When can you not do a loft conversion?

The ceiling height is too low and raising the roof isn't possible. You live in a listed building or conservation area where structural alterations aren't allowed. Neighbours who you share a party wall with won't give their consent for the loft conversion. You don't own the freehold for the loft space.

Does loft conversion make house warmer?

A loft conversion can increase your property's energy efficiency in a number of ways. By increasing the insulation in your loft you can reduce heat loss and help keep your home warm. A loft conversion can help to prevent heat loss in your home as it provides an extra layer of insulation.

How much does it cost to renovate an attic?

For the basics, you'll pay $30 to $60 per square foot, or up to $200 per square foot for all of the extras. Unfinished attics tend to have very little, even less than an unfinished basement in many cases. You might have exposed insulation and framing, and no electrical or HVAC systems.

Are attic bedrooms legal?

BUILDING CODES

Regulations vary from county to county, but most attic conversion building codes require: A minimum of 70 sq. ft. of floor space.

How do you know if your attic can be converted?

The Five Signs That You Can Convert Your Attic
  • Building Code Compliance.
  • Suitable Architectural Style.
  • Efficient Insulation.
  • Functional Electricity and HVAC Systems.
  • Proper Ventilation.

Previous article
Why is my fridge not cooling but the light is on?
Next article
Can you have too much roof insulation?