CRUCIS DESIGN carries out civil and structural engineering design for projects ranging in size from individual beams, to domestic extensions and multi-million pound mixed use developments.

All structural engineering projects are bespoke and our engineers are available to talk through your individual project and provide you with a quotation tailored to your needs; there are a range of domestic projects which fall into standard pattern types for which we can also provide an automated online quotation.

We can provide an automated online quotation for domestic / residential projects as listed below:
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  • Design of 1-3 steel beams for removal of internal / external walls.
  • Design of rectangular single storey rear extensions.
  • Design of gable ended single storey rear extension.
  • Design of box dormer loft conversion.

Please see below to get your online quotation.

If you require a domestic / residential design for any other form of project or a commercial project, we would be very happy to discuss this with you directly and provide you with a quotation tailored to your individual requirements.

Online Quotation - UK Domestic / Residential Properties

Our automated online quotations are intended for work to domestic / residential properties of standard construction (masonry buildings with timber floors and pitched roofs).
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Almost all our work will start with one of our engineers coming out to survey your property; this step allows us to look at the individual nature of your project, to discuss your requirements and to tailor our design work to your needs.

​If you don’t think your work falls within one of the standard patterns, please contact us directly and we can provide you with a quotation  tailored to your individual needs.
A standard UK domestic / residential property is a terraced, semi-detached or detached house with masonry walls timber floors and a pitched roof.

What Else Might I Need

CRUCIS DESIGNS have based our automatic online quotes on the form of construction we find most common for domestic / residential properties, but as each design is bespoke there may be site specific additional requirements. Our engineers will be able to advise once they have been to site / discussed the project with you.

The most common additional requirements are:
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  • Piled Foundations: The requirement for this type of foundation is largely driven by the proximity of trees close to the property, the nature of the soils below the property and the form of the existing foundations.
  • Portal Frames: If a very large proportion of the existing rear wall of a property is removed, this can affect the stability of the building and a steel goal post frame will be required to maintain overall stability; a similar frame can also be required for some extensions where only a very small amount of masonry is to be provided on the new rear elevation.

A) Standard Pattern Design - Beams for Removal of Existing Walls

​Typical Form

  • Design of 1-3 steel beams for removal of internal / external masonry walls.​
Design

  • Structural engineer's survey.
  • ​Design of new beams.
  • Assessment of capacity of existing walls & foundation.
  • ​Production of sketch drawings and supporting calculations.​

B) Standard Pattern Design - Rectangular Single Storey Extension

​Typical Form
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  • Rectangular single storey extension with masonry walls.
  • Up to about 6m x 5m in area.
  • One large opening to rear for bifold or sliding doors.
  • One large rooflight or several smaller rooflights.
  • Removal of part of the existing rear wall to join the new extension to the  ​existing building.
Design
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  • Structural engineer's survey.
  • Design of foundations.
  • Design of walls, floors and roofs.
  • Design of new steel beams and skylight trimmers.
  • Production of structural details and drawings.
  • Production of structural calculations.

C) Standard Pattern Design - Gable Ended Single Storey Extension

​Typical Form
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  • Single storey extension with pitched roof.
  • Up to about 6m x 5m in area.
  • Triangular end glazing as doors / windows.
  • ​Removal of part of the existing rear wall to join the new extension to the  ​existing building.
Design
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  • Structural engineer's survey.
  • Design of foundations.
  • Design of walls, floors and roofs.
  • Design of new steel beams and cranked steelwork over triangular glazing.
  • Production of structural details and drawings.
  • Production of structural calculations.

D) Standard Pattern Design - Box Dormer Loft

​Typical Form
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  • Box dormer across back of roof.
  • If hipped; extension of hip roof to form new gable end.
  • Retention of existing timber rafters to front.
  • Retention of ceiling strengthened as required.
Design
​
  • Structural engineer's survey.
  • Design of new steel and timber structure for loft conversion.
  • Assessment of capacity of existing walls & foundations.
  • Production of structural details and drawings.
  • Production of structural calculations.

E) Standard Pattern Design - Loft & Rectangular Single Storey Extension

​Typical Form​​
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  • Box dormer across back of roof.
  • Rectangular single storey extension with masonry walls.​
Design
​
  • Design of timber and steel structure for new loft conversion (see D above for details).
  • ​Design of new masonry extension (see B above for details).
  • Production of structural details and drawings.
  • Production of structural calculations.

F) Standard Pattern Design - Loft & Gable Ended Single Storey Extension

​Typical Form​​
​
  • Box dormer across back of roof.
  • Gable ended single storey extension with masonry walls.​
Design
​
  • Design of timber and steel structure for new loft conversion (see D above for details).
  • ​Design of new masonry extension (see C above for details).
  • Production of structural details and drawings.
  • Production of structural calculations.
CRUCIS DESIGNS ltd
Registered in England No. 07307105