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Works Commencement & Completion Notices: Specifications & Guidance
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Specs & Detail Drawings for Building Regs Applications
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Building Regs Specifications and Detail Drawings
Specifications
Wales
November 2022
changes
House Extension
House Extension Specifications for Construction Plans
Loft Conversion
Loft Conversion Specifications for Construction Plans
Garage Conversion
Garage Conversion Specifications for Construction Plans
New Build
New Build Specifications for Construction Plans
Flat Conversion
Flat Conversion Specifications for Construction Plans
Basement Convers'n
Basement Conversion Specifications for Construction Plans
Specifications
England
June 2022
changes
Registered Users
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Useful Sites
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Quick Start Guide

Choose Plan Type

1. Choose your type of plan and click the relevant button on the left-side panel to open the App.

Eg House Extensions

[Once you've started compiling your Specification within the app, please save your spec at regular intervals.

Building Regulations Extensions

If you want to open another page without leaving the app, you can right-click the link and select 'Open in New Window'.]

Select Category

2. Next, select a Category from the left-hand column within the app eg 'General Notes', 'Site Preparation', 'Structure' etc.

It may be useful to work through the list of categories on the left, from top-to-bottom, so that you don't miss anything out.

Building Regulations House Extension Notes

Pick a Subcategory

3. Go to the second/middle column to select a subcategory. You may need to work through several subcategories (the subcategory type is shown at the top of the column eg for Roofs, there is 'Roof Type', then 'Warm/Cold Roof', 'Rafter Size and Span' etc.) Pick the relevant choices to suit your plans.

Building Regulations Party Wall Note

Add a Note to the Specification

4. You may need to click through several choices before you reach a Building Note.

When you reach a Building Regulations Note**, click the 'Add Note to Note-List' button to add it to your Spec.

Party Wall Specification

**Some notes have a detail drawing (CAD & jpg formats). Add to your basket (Premium users can download drawing without any additional purchase) & purchase at the checkout. You can review your basket & go to checkout at any time.

The Specification / Note-List

5. Building Regulations Notes are shown in your Specification in the order in which you added them. Use the scrollbar review the list, if you require.

If a note doesn't meet the exact requirements for your project, you can edit it with the 'Edit Notes' feature. See the Further Info Guide for additional guidance on this function.

Party Wall Building Regulations Specification

Note: The Specs are applicable to work in England & Wales only.

Select and Copy into your CAD Program

6. Once you have added the notes and completed your specification, use the 'Copy' button at the top of your spec to copy the it to the clipboard.

Some browsers don't support the Copy function, in which case the button will read 'Select'. Click it, then manually copy the highlighted Specification by right-clicking (over the specification) and clhoosing 'Copy' from the menu.

Building Regulations for CAD title

In either case, paste the finished Building Regulations Specification into your CAD program.

Export your Specification as a Text File

The 'Export' button converts your specification into a Text file. After pressing the Export button you will be prompted to save the file on your computer.

Text Files can be opened with Text-Editor or Word-Processor programs e.g. Word.

Windows PC: Text Files can be opened on Windows computers with NotePad or WordPad.

Building Regulations for CAD title

Mac: Text Files can be opened on Mac Computers with 'TextEdit'.

Navigating through the Notes

The Navigation Bar shows the path you have taken through the subcategories.

You can use it to navigate back through subcategories.

House Extension Notes Menu System

For more guidance, you can view the Further Info Guide.
Or take a look at the Frequently Asked Questions.

Downloading Linked Detail Drawings (Premium Reg only)

Once you've added some specs with associated drawings, you can download all your linked details (in dwg format) in one go.

Click the 'Download DWGs' button on the right-hand side.

Then select a location to save a zip fie containing your drawings.

Download DWG Link

Please contact us if you have any queries about registration.

Sample Building Notes


FULL FILL CAVITY WALL
To achieve minimum U Value of 0.18 W/m²K
20mm two coat sand/cement render to comply to BS EN 13914-1 with waterproof additive on 100mm lightweight block, 0.15 W/m²K, e.g. Celcon solar, Toplite Standard.
Fully fill the cavity with 150mm Dritherm 32 cavity insulation as manufacturer's spec.
Inner leaf to be 100mm lightweight, 0.15 W/m²K, e.g. Celcon solar, Toplite standard.
Internal finish to be 12.5mm plasterboard on dabs.....register here for our full specifications and web apps.

TIMBER FRAME WALL
To achieve minimum U Value of 0.18 W/m²K
Outer skin to be 102mm suitable facing brick with 50mm vented and drained cavity provided between the stud and brick cladding.
Inner stud to have breathable membrane (a vapour resistance of not more than 0.6 MNs/g) fixed to 12mm thick W.B.P external quality plywood sheathing (or other approved).
Ply fixed to treated timber frame studs constructed using 150mm x 50mm treated timbers with head and sole plates and vertical studs (with noggins) at 400mm ctrs, or to s/engineer's details and calculations.
Insulation to be 70mm Kingspan Kooltherm between studs with .....register here for our full specifications and web apps.

RAINWATER DRAINAGE
New rainwater goods to be new 110mm UPVC half round gutters taken and connected into 68mm dia UPVC downpipes.
Rainwater taken to new soakaway, situated a min distance of 5.0m away from any building, via 110mm dia UPVC pipes surrounded in 150mm granular fill.
Soakaway to be min of 1 cubic metre capacity (or to depth to Local Authority approval), filled with suitable granular fill and provided with geotextile surround to prevent migration of fines.
If necessary carry out.....register here for our full specifications and web apps.

BLOCK AND BEAM FLOOR VENTILATION
Provide cross-ventilation of the under floor to outside air by ventilators in at least 2 opposite external walls of the building.
Ventilation openings having an opening area of 1500mm² per metre run of perimeter wall or.....register here for our full specifications and web apps.

SOLID BRICK WALL WITH EXTERNAL INSULATION
To achieve minimum U Value of 0.18 W/m²K
Mechanically fix 100mm Kingspan Kooltherm K5 external wall board to 215mm solid brick wall built using 1:1:6 cement mortar.
Insulation boards to be fixed using thermally broken proprietary telescopic tube fasteners at max 1m centres driven into pre-drilled holes, ensure a minimum of 5 fixings per insulation board.
Apply 20mm of suitable reinforced render with waterproof additive with a scraped or textured finish. Render to be applied directly to the insulation incorporating eml or glass fibre mesh.
Movement joints to.....register here for our full specifications and web apps.

Concise Construction Notes like these can be added to your Building Regulations Specification in just a few clicks within the Web Apps!

Adding a Timber Suspended Floor Note to a Specification

More help and guidance, including advice on advanced functions, please see the Further Info Guide.
A Step Beyond Guidance - Construction Specifications for Home Extension, Loft, Basement, Flat & Garage Conversion Plans
Quick Start Guide - The BuildingRegs4Plans Web Apps

Choose Plan Type

1. Choose your type of plan, House Extension, New Build, Flat Conversion, Loft Conversion, Garage Conversion, Garage Build, New Build Flats or Basement Conversion and click the relevant button on the left-side panel to open the App.

[Once you've started compiling your Specification within the app, please save your spec at regular intervals.

To open another page without leaving the app, right-click the link and select 'Open in New Window'.]

Building Regulations Extensions

 

Select Category

2. Next, select a Category from the left-hand column within the app eg 'General Notes', 'Site Preparation', 'Structure' etc.

Work through the list of categories on the left, from top-to-bottom, so that you don't miss anything out.

Building Regulations House Extension Notes

 

 

Pick a Subcategory

3. Go to the second/middle column to select a subcategory. Drill down through subcategories (the subcategory type is shown at the top of the column eg for Roofs, there is 'Roof Type', then 'Warm/Cold Roof', 'Rafter Size and Span' etc) to find the spec (and detail drawing) that you need. Pick the relevant choices to suit your plans.

Building Regulations Party Wall Note

 

Add a Note to the Specification

4. You may need to click through several choices before you reach a Building Note.

When you reach a Building Regulations Note**, click the 'Add Note to Note-List' button to add it to your Spec.

**Some notes have a detail drawing (CAD & jpeg formats). Add to your basket (Premium users can download drawing without any additional purchase) & purchase at the checkout. You can review your basket & go to checkout at any time.

Raft Foundation Building Regs Specification

The Specification / Note-List

5. Building Regulations Notes are shown in your Specification in the order in which you added them. Use the scrollbar review the list, if you require.

If a note doesn't meet the exact requirements for your project, you can edit it with the 'Edit Notes' feature. See the Further Info Guide for additional guidance on this function.

Note: The Specs are applicable to work in England & Wales only.

Party Wall Building Regulations Specification

 

Select and Copy into your CAD Program

6. Once you have added the notes and completed your specification, use the 'Select' or 'Copy' button at the top of your spec to copy the it to the clipboard.

Some browsers don't support the 'Copy' function, in which case the button will read 'Select'. Click it, then manually copy the highlighted Specification by right-clicking (over the specification) and clhoosing 'Copy' from the menu.

In either case, paste the finished Building Regulations Specification into your CAD program.

However, it may be preferable to download your specification by Exporting to PDF, TXT or, for Premium Users, to a Word document. See below and the Export Guide for more information.

Building Regulations for CAD title

 

Export your Specification as a Text File

The 'Export' button converts your specification into a Text file. After pressing the Export button you will be prompted to save the file on your computer.

Text Files can be opened with Text-Editor or Word-Processor programs e.g. Word.

Windows PC: Text Files can be opened on Windows computers with NotePad or WordPad.

Mac: Text Files can be opened on Mac Computers with 'TextEdit'.

Building Regulations for CAD title

 

Navigating through the Notes

The Navigation Bar shows the path you have taken through the subcategories.

You can use it to navigate back through subcategories.

For more guidance, see the Quick Start Video.

House Extension Notes Menu System

 

Downloading Linked Detail Drawings (Premium Reg only)

Once you've added some specs with associated drawings, you can download all your linked details (in dwg format) in one go.

Click the 'Download DWGs' button on the right-hand side.

Then select a location to save a zip fie containing your drawings.


Please contact us if you have any queries about registration.

Download DWG Link

For more guidance, you can view the Further Info Guide.
Or take a look at the Frequently Asked Questions.




Sample Building Notes

FULL FILL CAVITY WALL
To achieve minimum U Value of 0.18 W/m²K
20mm two coat sand/cement render to comply to BS EN 13914-1 with waterproof additive on 100mm lightweight block, 0.15 W/m²K, e.g. Celcon solar, Toplite Standard.
Fully fill the cavity with 150mm Dritherm 32 cavity insulation as manufacturer's spec.
Inner leaf to be 100mm lightweight, 0.15 W/m²K, e.g. Celcon solar, Toplite standard.
Internal finish to be 12.5mm plasterboard on dabs.....register here for our full specifications and web apps.

TIMBER FRAME WALL
To achieve minimum U Value of 0.18 W/m²K
Outer skin to be 102mm suitable facing brick with 50mm vented and drained cavity provided between the stud and brick cladding.
Inner stud to have breathable membrane (a vapour resistance of not more than 0.6 MNs/g) fixed to 12mm thick W.B.P external quality plywood sheathing (or other approved).
Ply fixed to treated timber frame studs constructed using 150mm x 50mm treated timbers with head and sole plates and vertical studs (with noggins) at 400mm ctrs, or to s/engineer's details and calculations.
Insulation to be 70mm Kingspan Kooltherm between studs with.....register here for our full specifications and web apps.

RAINWATER DRAINAGE
New rainwater goods to be new 110mm UPVC half round gutters taken and connected into 68mm dia UPVC downpipes.
Rainwater taken to new soakaway, situated a min distance of 5.0m away from any building, via 110mm dia UPVC pipes surrounded in 150mm granular fill.
Soakaway to be min of 1 cubic metre capacity (or to depth to Local Authority approval), filled with suitable granular fill and provided with geotextile surround to prevent migration of fines.
If necessary carry out.....register here for our full specifications and web apps.

BLOCK AND BEAM FLOOR VENTILATION
Provide cross-ventilation of the under floor to outside air by ventilators in at least 2 opposite external walls of the building.
Ventilation openings having an opening area of 1500mm² per metre run of perimeter wall or.....register here for our full specifications and web apps.

SOLID BRICK WALL WITH EXTERNAL INSULATION
To achieve minimum U Value of 0.18 W/m²K
Mechanically fix 100mm Kingspan Kooltherm K5 external wall board to 215mm solid brick wall built using 1:1:6 cement mortar.
Insulation boards to be fixed using thermally broken proprietary telescopic tube fasteners at max 1m centres driven into pre-drilled holes, ensure a minimum of 5 fixings per insulation board.
Apply 20mm of suitable reinforced render with waterproof additive with a scraped or textured finish. Render to be applied directly to the insulation incorporating eml or glass fibre mesh.
Movement joints to.....register here for our full specifications and web apps.

Concise Construction Notes like these can be added to your Building Regulations Specification in just a few clicks within the Web Apps!

Adding a Timber Suspended Floor Note to a Specification

More help and guidance, including advice on advanced functions, please see the Further Info Guide.

To begin compiling your Building Regulations Specification, choose either House Extension, New Build, Flat Conversion, Loft Conversion, Garage Conversion or Garage Build.

A Step Beyond Guidance - Construction Specifications for Home Extension, Loft & Garage Conversion Plans - Advice & Guidance
House Extensions Guidance

When compiling Building Regulations Notes for House Extensions, bear in mind that Building Control or your Approved Inspector will want to see a comprehensive list of Building Specifications including floor type (eg solid floor), roof construction, wall type and construction, and foundation type.

The House Extensions Specifications should include notes covering aspects of Fire Safety such as smoke detection, and Escape Windows from First Floor Rooms, where applicable.

Structural Calculations and Details should also be included as part of the Building Control / Approved Inspector Submission.

Work through the categories on the left side of our House Extensions App to make sure you have included necessary specifications.

You should always check with your Building Control Officer or Approved Inspector for guidance regarding any additional details that may be required.

Loft Conversions Guidance

As well as notes for standard construction details, Loft Conversions Specifications should include notes for:

  • Provisions for Means of Escape in Case of Fire
  • Dormer Walls and Roofs
  • Upgrading of existing external walls, party walls and roofs
  • Dwarf / Ashlar Walls
  • Stairs
  • Upgrading of internal floors for fire resistance

Work through the categories on the left side of our Loft Conversions App to make sure you have included necessary specifications.

Structural Calculations and Details should also be included as part of the Building Control / Approved Inspector Submission.

Check with your Building Control Officer or Approved Inspector for guidance regarding additional details that may be required.

Garage Conversions Guidance

In addition to the Building Regulations notes for the standard construction details, Garage Conversions Specifications should include notes for:

  • New Infill External Walls
  • Upgrading existing external walls
  • Upgrade party walls and roofs, if required
  • Upgrading of existing floors including thermal and damp upgrade

Work through the categories on the left-hand panel of our Garage Conversions App to make sure you have included necessary building specifications.

You should always check with your Local Authority Building Control Officer or Approved Inspector for guidance regarding any additional details that may be required.