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Works Commencement & Completion Notices: Specifications & Guidance
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Building Regs Specifications and Detail Drawings
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Wales
November 2022
changes
House Extension
House Extension Specifications for Construction Plans
Loft Conversion
Loft Conversion Specifications for Construction Plans
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Garage Conversion Specifications for Construction Plans
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New Build Specifications for Construction Plans
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Flat Conversion Specifications for Construction Plans
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Basement Conversion Specifications for Construction Plans
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England
June 2022
changes
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Building Works Commencement
& Completion Notices

Specifications and Templates
Premium Registration Video

Updates in Brief

21/05/2024 New In-Depth Video Tutorial: Load/Save/Export a Specification
16/05/2024 New Intro Tutorial: Starting a House Extension Specification
01/05/2024 QuickSpec App Tutorial: View and Compile Specifications on Mobile

Up-to-date Specifications for Home Extension, New Build, Flat Conversion, Loft, Basement & Garage Conversion, New Build Flats and Garage Build Plans

The Construction Notes & Specifications form an essential component of a Building Regulations plans submission for Building Control or for an Approved Inspector.

Building Regulations Guidance Notes and Approved Documents are an aid to compiling Construction Notes for drawings but preparing a clear and concise specification for an Application can prove to be an arduous task.

Our categorised pre-prepared Building Regulations Construction Notes can be added within the App with a few clicks of the mouse into a specification that is custom-designed to meet the requirements of your Building Project.

Many of our construction notes are very specific, so please select the correct one for your situation (ie correct dimensions, type of insulation) and type of plans (ie house extensions, loft, flat, garage conversions or garage builds)

This is where our innovative and easy-to-use App for producing Building Regulations Specifications for Home Extension, Loft, Flat, Basement and Garage Conversion, Garage Build and New Build Plans comes into its own, offering more than standard construction guidance.

Our categorised pre-prepared Building Regulations Construction Notes can be added within the App with a few clicks of the mouse into a specification that is custom-designed to meet the requirements of your Building Project.

Many of our construction notes are very specific, so please select the correct one for your situation (ie correct dimensions, type of insulation) and type of plans (ie house extensions, loft, flat, garage conversions or garage builds), eg

SOLID FLOOR INSULATION OVER SLAB
To meet min U value required of 0.18 W/m²K
P/A ratio 0.5
Solid ground floor to consist of 150mm consolidated well-rammed hardcore, blinded with 50mm sand blinding. Provide 100mm ST2 or Gen2 ground bearing slab concrete mix to conform to BS 8500-2 over a 1200 gauge polythene DPM. DPM to be lapped in with DPC in walls. Floor to be insulated over slab and DPM with min 90mm thick Celotex GA4000 insulation.
25mm insulation to continue around floor perimeters to avoid thermal bridging. A VCL should be laid over the insulation boards and turned up 100mm at room perimeters behind the skirting, all joints to be lapped by 150mm and sealed. Finish with 65mm sand/cement finishing screed with light mesh reinforcement.
Where drain runs pass under new floor, provide A142 mesh 1.0m wide and min 50mm concrete cover over length of drain.
Where existing suspended timber floor air bricks are covered by new extension, ensure cross-ventilation is maintained by connecting to 100mm dia UPVC pipes with 100mm concrete cover laid under the extension. Pipes to terminate at new 65mm x 215mm air bricks with cavity tray over.
WARM PITCHED ROOF UNVENTED
Pitch 22-45° (imposed load max 0.75 kN/m² - dead load max 0.75 kN/m²)
To achieve min U-value required of 0.15 W/m²K
Timber roof structures to be designed by an Engineer in accordance with NHBC Technical Requirement R5 Structural Design.
Calculations to be based on BS EN 1995-1-1:2004 Eurocode 5: Design of timber structures.
Roofing tiles to match existing fixed to tile battens secured over breathable felt to relevant BBA Certificate allowing the breather felt to sag at least 10mm over preservative-treated counter battens (min 38mm x 50mm).
Provide 100mm Celotex GA4000 insulation boards under the counter battens and 40mm Celotex TB4000 between 47 x 100mm timber rafters strength class C24 at 400 c/c – to give a max 2.12m span.
A vapour control layer should be provided to the underside of the rafters. Finish with 12.5mm plasterboard and skim.
Restraint strapping - Ceiling joists tied to rafters (if raised collar roof consult Structural Engineer). 100mm x 50mm wall plate strapped down to walls.
Ceiling joists and rafters to be strapped to walls and gable walls, straps built into cavity, across at least 3 timbers with noggins.
All straps to be 1000 x 30 x 5mm galvanized straps or other approved to BSEN 845-1 at 2m centres.
Construction Detail Drawings - Quick Links

As well as the drawings shown with the relevant Building Regulations Specifications, we have a section of quick links where you can easily access a range of common drawings taken from Home Extensions, Loft and Garage Conversions for use on your Building Regulations Plans for submission to Building Control or Approved Inspectors.

Building Regulations Specifications and Detail Drawings for Home Extensions, Loft, Flat, Basement & Garage Conversions, Garage Builds & New Builds
Advice & Guidance
Building Works Commencement & Completion Notices

Specifications and Templates

Updates in Brief

21/05/2024 New In-Depth Video Tutorial: Load/Save/Export a Specification
16/05/2024 New Intro Tutorial: Starting a House Extension Specification
01/05/2024 QuickSpec App Tutorial: View and Compile Specifications on Mobile
Building Regulations Applications for Extensions, Flat, Loft & Garage Conversions, Basement Conversions, Garage Builds and New Builds
A Selection of Detail Drawings by Categories. This is just a Small Sample from our Drawings Library.

Check out a small selection of Common Detail Drawings

View a selection of Detail Drawings by section Foundation Detail Drawings

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There are 2 main registration Schemes providing the following benefits.

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Building Regulations - advice and guidance
Building Plans with Specification

Specifications for Home Extension, New Build, Flat Conversion, Loft, Basement & Garage Conversion, New Build Flats and Garage Build Plans

The Construction Notes & Specifications form an essential component of a Building Regulations Application for Building Control or for an Approved Inspector.

Building Regulations Guidance Notes and Approved Documents are an aid to compiling Construction Notes for drawings but preparing a clear and concise specification for an Application can prove to be an arduous task.

This is where our innovative and easy-to-use App for producing Building Regulations Specifications for Home Extension, Loft, Flat and Garage Conversion, Garage Build and New Build Plans comes into its own, offering more than standard construction guidance.

Here's a screenshot of the Building Regulations Specification App (for house extensions):

Building Regulations for Extensions Screenshot

Our categorised pre-prepared Building Regulations Construction Notes can be added within the App with a few clicks of the mouse into a specification that is custom-designed to meet the requirements of your Building Project.

Many of our construction notes are very specific, so please select the correct one for your situation (ie correct dimensions, type of insulation) and type of plans (ie house extensions, loft, flat, garage conversions or garage builds), eg

SOLID FLOOR INSULATION OVER SLAB
To meet min U value required of 0.18 W/m²K
P/A ratio 0.5
Solid ground floor to consist of 150mm consolidated well-rammed hardcore, blinded with 50mm sand blinding.
Provide 100mm ST2 or Gen2 ground bearing slab concrete mix to conform to BS 8500-2 over a 1200 gauge polythene DPM.
DPM to be lapped in with DPC in walls. Floor to be insulated over slab and DPM with min 90mm thick Celotex GA4000 insulation.
25mm insulation to continue around floor perimeters to avoid thermal bridging.
A VCL should be laid over the insulation boards and turned up 100mm at room perimeters behind the skirting, all joints to be lapped by 150mm and sealed.
Finish with 65mm sand/cement finishing screed with light mesh reinforcement.
Where drain runs pass under new floor, provide A142 mesh 1.0m wide and min 50mm concrete cover over length of drain.
Where existing suspended timber floor air bricks are covered by new extension, ensure cross-ventilation is maintained by connecting to 100mm dia UPVC pipes with 100mm concrete cover laid under the extension.
Pipes to terminate at new 65mm x 215mm air bricks with cavity tray over.

However, the site makes it easy to choose your specification.

The note above would be found by navigating through the App in the House Extensions section:

Concise Notes like these shown above, can be added to your house extension specification with just a few clicks in our app! (You can also add the associated construction detail drawing to your basket.)

Another example (from House Extensions):

WARM PITCHED ROOF UNVENTED
Pitch 22-45° (imposed load max 0.75 kN/m² - dead load max 0.75 kN/m²)
To achieve min U-value required of 0.15 W/m²K
Timber roof structures to be designed by an Engineer in accordance with NHBC Technical Requirement R5 Structural Design.
Calculations to be based on BS EN 1995-1-1:2004 Eurocode 5: Design of timber structures.
Roofing tiles to match existing fixed to tile battens secured over breathable felt to relevant BBA Certificate allowing the breather felt to sag at least 10mm over preservative-treated counter battens (min 38mm x 50mm).
Provide 100mm Celotex GA4000 insulation boards under the counter battens and 40mm Celotex TB4000 between 47 x 100mm timber rafters strength class C24 at 400 c/c – to give a max 2.12m span.
A vapour control layer should be provided to the underside of the rafters. Finish with 12.5mm plasterboard and skim.
Restraint strapping - Ceiling joists tied to rafters (if raised collar roof consult Structural Engineer). 100mm x 50mm wall plate strapped down to walls.
Ceiling joists and rafters to be strapped to walls and gable walls, straps built into cavity, across at least 3 timbers with noggins.
All straps to be 1000 x 30 x 5mm galvanized straps or other approved to BSEN 845-1 at 2m centres.

Other Building Regulations Construction Notes in our app are supplied with just a single version such as (from House Extension, Loft and Garage Conversions):

ELECTRICAL
All electrical work required to meet the requirements of Part P (electrical safety) must be designed, installed, inspected and tested by a Competent Person registered under a Competent Person Self Certification Scheme such as BRE certification Ltd, BSI, NICEIC Certification Services or Zurich Ltd.
An appropriate BS7671 Electrical Installation Certificate is to be issued for the work by a person competent to do so.
A copy of a certificate will be given to Building Control on completion.

And (from House Extensions)

LEAD WORK AND FLASHINGS
All lead flashings, any valleys or soakers to be Code 5 lead and laid in accordance with BS 5534 and BS EN 12588.
Flashings to be provided to all jambs and below window openings with welded upstands.
Joints to be lapped min 150mm and lead to be dressed 200mm under tiles, etc.

The note above can be found at:

To tryout our Building Regulations Specification App, you can begin straightaway by clicking one of the main category buttons above, House Extensions, Loft Conversions, Flat Conversions, Garage Conversions, New Build or Garage Build. To access the Loft Conversion, Garage Conversion, Flat Conversion, New Build or Garage Build Specifications you'll need to register for an account. But you can see our House Extension specifications on the app (although the 'copy' function has been disabled for non-registered users.)

If you want some help and guidance before getting started please look at our Quick Start Guide or watch the Introductory Quick Start Video. There are also information pages that you should read for New Builds and Flat Conversions as well as an FAQ page.

Construction Detail Drawing Warm Pitched Roof

We believe that Building Regs 4 Plans can take the hard work out of manually creating a Construction specification from Building Regulations Guidance Notes and the Approved Documents.

Lastly, we hope that you enjoy using our website and app!

BuildingRegs4Plans.

Building Regulations Application -Home Extensions - Loft, Flat, Basement & Garage Conversions - Help, Advice & Guidance
Construction Detail Drawings - Quick Links

As well as the drawings shown with the relevant Building Regulations Specifications, we have a section of quick links where you can easily access a range of common drawings taken from Home Extensions, Loft and Garage Conversions for use on your Building Regulations Plans for submission to Building Control or Approved Inspectors.

A Step beyond Building Regulations Guidance for Home Extensions, Loft, Flat & Garage Conversion & Garage Build Specifications
Advice & Guidance