Plans for loft conversion

Question

What plans do I need for a dormer loft conversion.

Truss roof, built in 2013, 3 bed semi detached, permitted development.

I think an architect may be a bit overkill for what I am trying to achieve.

I was thinking building regulation plans or can I just do a building notice? I assume I will also need a structural engineer to do the calcs.

Waldemar · Accepted Answer

For a dormer loft conversion in London, it's recommended to consult with professionals such as an architect and a structural engineer to ensure compliance with building regulations and to address any structural considerations. While an architect may seem like overkill for your project, their expertise can be valuable in designing a functional and aesthetically pleasing conversion that meets your needs.

Regarding the plans and regulations, there are two common routes you can take: building regulation plans or a building notice.

Building Regulation Plans: This involves preparing detailed plans and specifications that comply with the Building Regulations. These plans provide a comprehensive overview of the proposed conversion, including structural elements, insulation, fire safety, ventilation, and other important aspects. Building regulation plans typically require input from an architect or architectural technician.

Building Notice: Alternatively, you can submit a building notice to your local authority. This is a simpler and less detailed process where you notify the council of your intention to carry out the conversion. However, it's important to note that with a building notice, you may not receive detailed feedback or pre-approval on your plans, which could result in issues during the construction or inspection process.

In both cases, it's advisable to involve a structural engineer who can assess the structural requirements of the conversion and provide calculations and drawings as needed. A structural engineer ensures that the proposed changes will be structurally sound and meet the necessary safety standards.

It's important to check with your local authority or a building control body to understand the specific requirements and regulations applicable to your area. They can provide guidance on the necessary documents, fees, and processes for your loft conversion project.

Dave · Answer

You will need plans for building control which show all the structural requirements including a possible engineers report to validate the adequacy of any steel beams. If your property is in a conservation area you may also require architectural plans for planning submission.

Norman · Answer

If you know the layout needed then there’s not much point in using an architect for permitted development 
You could get a Structural Engineer to look/design the trusses and then a local truss manufacturer to supply any drawings .
A Building Notice is the most cost effective way to get Building Regulation Approval.

Michael · Answer

For a dormer loft conversion on a truss roof under permitted development rights, you will typically require building regulation plans and calculations from a structural engineer. While an architect may not be necessary for every project, consulting with a professional can ensure that your plans meet the necessary standards and regulations.

Patrick · Answer

You will need a structural engineers calls,  the floor will need to be double jointed and adequate head height ant the stairs in compliance with fire regs.

Scott · Answer

it might feel a bit like over kill engaging a architect but it will eliminate any grey areas when it comes to costing your project and you will certainly need calculations for the design as its a trussed roof.

Alex · Answer

You will need architectural drawings, regardless of the project being  qualified for, Under permitted development,  as they will need to be submitted by Building control company, or yourself to the council before the works star's.

Also a structural engineer must be involved as he will Check the load of the new structure, and advice accordingly for structural materials needed.

John · Answer

If you have a trussed roof then you have a major problem. You are looking at a total rebuild of the roof structure. In most situations like this the cost of the work outweighs it benefits as you need to convert it back to a traditional roof. If you attempt to cut sections out then it will fail as trusses only work in their entirety.

Kevin · Answer

Hi 
If it’s to the rear then should be fine on building notice 
A structural engineer is needed so he can do calculations on the supports  for the building inspector 
Approx cost to building regs £750 -£850 Structual engineer would be £750-£1000 pending on how big the project is

Plans for loft conversion

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