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Residential vs Commercial Structural Services
At Shorplans, we support a wide range of clients — from individual homeowners and landlords to commercial developers and businesses across London. Our structural engineering services are tailored to meet the unique demands of each project type, whether it’s a home extension or a full commercial fit-out.
Click through below to learn more about our Residential and Commercial services
Residential
We work closely with homeowners, landlords, and domestic builders to deliver cost-effective, compliant structural solutions. Our engineers can advise at every stage of your home improvement journey — from early feasibility to final sign-off.
Common residential services include:
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Structural calculations for single-storey and double-storey extensions
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Loft conversion beam design and floor strengthening
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Internal wall removal and RSJ beam specifications
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Foundation design for garden rooms or new builds
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Structural drawings for Building Control submissions
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Retrospective reports for works already carried out
Whether you’re creating an open-plan kitchen or building upwards, we help ensure your plans are structurally safe and approved without delays.
Structural Engineer Services
The backbone of any construction project, ensuring that buildings are not only aesthetically pleasing but also safe, durable, and compliant with industry standards.
Our commitment to innovation, safety, and client satisfaction sets us apart in an industry where precision and reliability are paramount.
Click through below for more information on some of the architectural services we offer at Shorplans.
Structural Engineers In London & Surrey
At Shorplans we offer professional structural engineering services across London, supporting homeowners, landlords, developers, and businesses with safe, compliant, and cost-effective solutions. Whether you're planning a house extension, loft conversion, internal wall removal, or a commercial fit-out, our qualified structural engineers deliver detailed calculations, structural drawings, and reports tailored to meet Building Control and planning requirements.
We specialise in structural services for both residential and commercial properties, covering steel beam (RSJ) calculations, foundation design, load-bearing wall assessments, and structural inspections. Working closely with our in-house architectural and planning teams, we streamline the process from concept to construction, helping ensure your project is delivered on time and within budget.
Get in touch today to request a quote or speak with a structural engineer about your project in London.
What sets us apart?
Experienced Team
At Shorplans, we've have a team of experienced and highly skilled structural engineers with a proven track record in residential and commercial projects.
Innovation and Technology
We stay at the forefront of industry innovation and leverage cutting-edge technology to enhance the precision and efficiency of our structural engineering services.
Comprehensive Solutions
From initial design to construction oversight, our team provides end-to-end structural engineering solutions, ensuring a seamless and well-coordinated process.
What does a structural engineer do?
A structural engineer plays a vital role in the design, safety, and compliance of construction projects. Whether you're planning a home extension, removing internal walls, or undertaking a commercial fit-out, a structural engineer ensures that any alterations are safe, load-bearing, and meet Building Control regulations.
At Shorplans, our network of qualified structural engineers provides the essential calculations and drawings needed to support planning applications, building regulations approval, and construction. We assess the strength and stability of your building, ensuring that structural elements like beams, foundations, and walls can safely carry the required loads.
Common reasons to hire a structural engineer:
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Wall removal: Checking if a wall is load-bearing and designing the necessary support (e.g. RSJ beam)
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Extensions and loft conversions: Calculating structural reinforcements, foundation depth, and beam support
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Basement works: Providing calculations for retaining walls, underpinning, and waterproofing structures
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Property conversions: Adapting the structure to meet new layout or usage needs
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Building Control approval: Submitting detailed drawings and calculations to satisfy local authority requirements
By working with Shorplans, you’ll receive expert guidance every step of the way — from the initial structural assessment to final sign-off. Whether you're a homeowner or commercial developer, our team is here to ensure your project stands on solid ground.
Structural Engineering Services
At Shorplans, we offer a full range of structural engineering services across London, tailored to suit both residential and commercial projects. Whether you're making minor internal changes or managing a large-scale build, our structural engineers provide the calculations, drawings, and advice you need to move forward with confidence.
Each service is delivered with speed, clarity, and compliance in mind — helping you gain approval from Building Control and avoid costly delays during construction.
Structural Calculations for Building Control
We provide detailed structural calculations required to obtain Building Control approval. These calculations cover beams, joists, foundations, and other load-bearing elements — ensuring your project meets all structural safety requirements.
Steel Beam / RSJ Calculations
If you’re removing a load-bearing wall or opening up internal spaces, our engineers will calculate the correct size and specification of RSJ (Rolled Steel Joist) beams or other steelwork needed to safely support your property.
Load-Bearing Wall Removal Assessments
We assess internal walls to determine whether they are load-bearing and provide solutions — including beam design and padstone sizing — to safely allow their removal.
Structural Drawings
Our engineers produce clear, accurate structural drawings to accompany your calculations. These are essential for builders, contractors, and Building Control to understand how the structural elements should be implemented on site.
Foundation Design
For home extensions, new builds, and basement works, we design appropriate foundations based on soil type, load demands, and structural layout — ensuring long-term stability and compliance.
Structural Inspections & Reports
We carry out on-site structural inspections and produce reports for a range of needs — including retrospective works, building cracks, subsidence concerns, or mortgage and insurance requirements.
Structural Services for Commercial Projects
We offer structural support for commercial fit-outs, refurbishments, and conversions. From mezzanine floor design to large open-plan layouts, we work with landlords, tenants, and commercial developers across London.
The Building Control Process
The building control process are a set of procedures and regulations designed to ensure that buildings are constructed in a safe and sustainable manner. The process typically involves obtaining approvals and permits from local authorities, complying with building codes and standards, and conducting inspections throughout various stages of construction.
Below is a general overview of the building control process:
Planning and design
This is the initial stage of the process, where architects and engineers develop the plans and specifications for the building project. They need to consider various factors such as site conditions, building regulations, and environmental requirements.
Building permit application
Once the plans are finalized, the builder or property owner must submit a building permit application to the local authorities. This application includes details about the proposed construction, such as building plans, site plans, and structural calculations.
Plan review
The local authorities review the building plans to ensure they comply with building codes and standards. They may also conduct site inspections to verify the accuracy of the plans.
Permit issuance
If the plans are approved, the local authorities issue a building permit, allowing the construction work to begin.
Construction
The builder or contractor begins the construction work, following the approved plans and specifications. They must adhere to building regulations, and environmental requirements throughout the construction process.
Inspections
During construction, the local authorities conduct inspections at various stages to ensure that the work is being done in compliance with the approved plans and codes. The inspections may include structural, electrical, plumbing, and fire safety checks.
Final inspection and occupancy permit
Once the construction is complete, a final inspection is conducted to ensure that the building is safe and habitable. If the building meets all the requirements, an occupancy permit is issued, allowing the building to be occupied.
Overall, the building control process is essential for ensuring that buildings are constructed safely and sustainably. It helps to protect the health and safety of occupants and ensures that the building meets environmental standards.
Residential Permitted Control
Permitted development rights (PDRs) for residential buildings in the UK allow homeowners to carry out certain building works and changes without needing full planning permission. These rights are specified in the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended).
Here is an overview of the key permitted development rights for residential buildings:
Extensions and Alterations
Single-Storey Rear Extensions (Class A):
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Extensions can extend up to 4 meters for detached houses and 3 meters for other houses.
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Until May 30, 2024, larger home extensions are allowed: up to 8 meters for detached houses and 6 meters for other houses, subject to the Neighbour Consultation Scheme.
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Two-Storey Rear Extensions (Class A):
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Maximum 3 meters in depth.
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Must be at least 7 meters from the rear boundary.
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Side Extensions (Class A):
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Single-storey only.
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Maximum height of 4 meters and width no more than half the width of the original house.
Loft Conversions and Roof Extensions (Class B):
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Up to 50 cubic meters for detached and semi-detached houses, and 40 cubic meters for terraced houses.
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Cannot extend beyond the existing roof slope on the principal elevation or be higher than the highest part of the roof.
Roof Alterations (Class C):
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Includes installation of roof lights or dormer windows, provided they do not project more than 150mm beyond the plane of the existing roof slope or higher than the highest part of the roof.
Porches (Class D):
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Maximum floor area of 3 square meters.
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Maximum height of 3 meters.
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Must be at least 2 meters from any boundary with a highway.
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Outbuildings and Other Structures (Class E)
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Includes sheds, garages, greenhouses, and other incidental buildings.
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Must not cover more than 50% of the land around the original house.
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Maximum height of 4 meters for a dual-pitched roof, or 3 meters for other roofs.
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Maximum height of 2.5 meters if within 2 meters of a boundary.
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Other Permitted Developments
Fences, Gates, and Walls (Class A of Part 2):
Maximum height of 2 meters, or 1 meter if adjacent to a highway.
Solar Panels and Other Renewable Energy Systems (Classes A and B of Part 14):
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Subject to specific conditions and limitations to minimize visual impact.
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Driveways and Hard Surfaces (Class F):
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Provision for permeable surfacing to manage runoff.
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Conditions and Limitations
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Principal Elevation and Conservation Areas: Developments must not extend beyond the principal elevation facing a highway or be in conservation areas, national parks, areas of outstanding natural beauty, or listed buildings without specific permissions.
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Building Regulations: All developments must comply with building regulations.
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Article 4 Directions: Local authorities can remove specific permitted development rights through Article 4 Directions, requiring planning permission in certain areas.
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Important Considerations
Prior Approval: Some larger developments, such as significant home extensions, require prior approval from the local planning authority, particularly concerning impact on neighbors and the environment.
It’s advisable to check with the local planning authority for specific local regulations or restrictions.
Commericial Permitted Control
Permitted development rights (PDRs) for commercial buildings in the UK allow certain types of building work and changes of use to be carried out without the need for a full planning application. These rights are outlined in the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended). Below are some key points regarding permitted development rights for commercial buildings:
Change of Use
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Office to Residential (Class O): Conversion of office buildings (Class B1(a)) to residential use (Class C3).
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Retail to Residential (Class M): Change of use from retail (Class A1) or financial/professional services (Class A2) to residential use (Class C3), with limitations.
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Retail to Mixed Use (Class G): Change of use of a building from a retail (Class A1) to a mixed-use combining residential (Class C3) and retail use.
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Agricultural to Flexible Use (Class R): Change of use from agricultural buildings to flexible commercial use such as shops, financial/professional services, restaurants/cafes, offices, storage/distribution, hotels, or assembly/leisure.
Extensions and Alterations
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Industrial and Warehouse Extensions (Class H): Extension or alteration of an industrial building or a warehouse.
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Office Extensions (Class A): Extension or alteration of an office building.
Temporary Uses
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Temporary Use of Buildings (Class D): Allows temporary use of a building or land for specified uses (e.g., retail, office, leisure) for up to three years.
Demolition
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Demolition of Buildings (Part 11): Demolition of certain buildings without needing a full planning application, subject to conditions and prior approval.
Conditions and Limitations
Permitted development rights come with specific conditions and limitations:
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Prior Approval: Some changes of use and extensions require prior approval from the local planning authority concerning impacts such as transport, flooding, contamination, and noise.
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Floor Space Limits: There are restrictions on the amount of floor space that can be developed under PDRs. For instance, office to residential conversions must not exceed 1,500 square meters.
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Location Restrictions: PDRs may not apply in certain protected areas, such as conservation areas, national parks, areas of outstanding natural beauty, and listed buildings.
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Design and External Appearance: Extensions must conform to specific design criteria, including height and materials.
Important Considerations
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Local Authority Regulations: Local planning authorities can remove permitted development rights through Article 4 Directions, requiring a full planning application for certain types of development.
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Building Regulations: All works must comply with relevant building regulations, even if planning permission is not required.
Commercial
For commercial clients — including office managers, landlords, retail businesses and developers — we provide efficient structural solutions designed to meet regulatory standards and commercial timelines.
Typical commercial support includes:
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Structural calculations for office refurbishments and layout changes
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Mezzanine floor support and load-bearing checks
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Change-of-use structural reports for planning and Building Control
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Structural drawings for shopfitting or restaurant design
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Structural inspections for lease agreements, insurance, or asset management
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Load assessments for heavy plant or storage installations
We understand the pace of commercial work — which is why we prioritise clear communication, fast turnaround times, and seamless coordination with your contractor or fit-out team.
Frequently asked questions
Work with Us
Thinking about starting a project or want to learn more? Speak to our team today and book in a free no-obligation quotation.
Visit Us
Weatherill House Business Centre New South Quarter
23 Whitestone Way
Croydon
CR0 4WF