Federation of Master Builders
Federation Of Master Builders

FAQs

Frequently Asked Questions from our customers

FAQs

Frequently Asked Questions from our customers

Common questions at the planning stage

Yes – for early guidance only.

Planning drawings are not construction-ready documents, but they usually contain enough information to provide a structured budget estimate.

At this stage, pricing is presented as a considered range rather than a fixed quotation. A firm quotation requires structural calculations, Building Regulations detail and confirmed specification.

The best projects don’t start with a number – they start with clarity about scope, expectations and outcome.

Planning approval confirms your proposal is acceptable in principle — not that it is ready to build.

The project then moves from visual intent to technical definition. Typical next steps include:

  • Structural calculations and engineering design
  • Building Regulations drawings and compliance detail
  • Drainage and services coordination
  • Detailed specification development
  • Accurate pricing and programme scheduling

Only once these elements align does the project become build-ready.

Work rarely begins immediately after planning approval — and that is intentional.
Before construction can start, the project moves through technical preparation:

  • Structural calculations (3–4 weeks)
  • Building Regulations drawings (2–4 weeks)
  • Final pricing and scheduling (2–4 weeks)

In most cases, construction begins approximately 8–12 weeks after planning approval, depending on complexity.

Preparation prevents disruption. Structured sequencing ensures the build phase begins with clarity rather than assumption.

Construction cost depends on the level of detail available and the ambition of the project. Cost will be driven by:

  • Scale and structural complexity
  • Specification level and finishes
  • Site access and logistics
  • Services, drainage and regulatory requirements

…and influenced by your own aspirations for how the space should perform and feel.

At early stages, pricing is provided as a considered range. As structural design, specification and regulatory detail develop, that range narrows into a formal quotation.

Through measured assessment and review, clarity replaces assumption — before construction begins.

Yes – for early guidance only.

Planning drawings are not construction-ready documents, but they usually contain enough information to provide a structured budget estimate.

At this stage, pricing is presented as a considered range rather than a fixed quotation. A firm quotation requires structural calculations, Building Regulations detail and confirmed specification.

The best projects don’t start with a number – they start with clarity about scope, expectations and outcome.

Planning approval confirms your proposal is acceptable in principle — not that it is ready to build.

The project then moves from visual intent to technical definition. Typical next steps include:

  • Structural calculations and engineering design
  • Building Regulations drawings and compliance detail
  • Drainage and services coordination
  • Detailed specification development
  • Accurate pricing and programme scheduling

Only once these elements align does the project become build-ready.

Work rarely begins immediately after planning approval — and that is intentional.
Before construction can start, the project moves through technical preparation:

  • Structural calculations (3–4 weeks)
  • Building Regulations drawings (2–4 weeks)
  • Final pricing and scheduling (2–4 weeks)

In most cases, construction begins approximately 8–12 weeks after planning approval, depending on complexity.

Preparation prevents disruption. Structured sequencing ensures the build phase begins with clarity rather than assumption.

Construction cost depends on the level of detail available and the ambition of the project. Cost will be driven by:

  • Scale and structural complexity
  • Specification level and finishes
  • Site access and logistics
  • Services, drainage and regulatory requirements

…and influenced by your own aspirations for how the space should perform and feel.

At early stages, pricing is provided as a considered range. As structural design, specification and regulatory detail develop, that range narrows into a formal quotation.

Through measured assessment and review, clarity replaces assumption — before construction begins.

Common questions about loft conversions

A simple loft conversion with Velux windows can cost as little £30,000 – whereas a complete high-end rebuild of the upper storey of a house may cost £130,000.

The construction phase will provide a watertight superstructure with finished roofing, glazing and staircase built to regulations and signed off by the building inspector.

Duration depends on complexity. A discrete conversion with Velux windows typically takes between 6-8 weeks, a dormer 8-10 weeks and a new build between 12-16 weeks.

We can arrange a start date for a Loft Conversion project within 6-8 weeks from contract and always within 12 weeks – or scheduled around your existing commitments.
A simple loft conversion with Velux windows can cost as little £30,000 – whereas a complete high-end rebuild of the upper storey of a house may cost £130,000.
The construction phase will provide a watertight superstructure with finished roofing, glazing and staircase built to regulations and signed off by the building inspector.
Duration depends on complexity. A discrete conversion with Velux windows typically takes between 6-8 weeks, a dormer 8-10 weeks and a new build between 12-16 weeks.
We can arrange a start date for a Loft Conversion project within 6-8 weeks from contract and always within 12 weeks – or scheduled around your existing commitments.

Common questions about extensions

If you’re dreaming of building an extension onto your home, we recommend first engaging with an architect who will be able to help you explore your options and advise if planning permission will be needed. You will then need to appoint a structural engineer to design the floor and roof structures, as well as provide calculations for supporting beams. View our top tips for planning your extension here.

Whether you will need planning permission for your home extension will depend on the height, length, materials and site restrictions. We can help you to understand what planning permission you might need once we get an understanding of your requirements. You might find it useful to see our article on planning your extension.

Absolutely. A major change to your home can be a daunting prospect if you’re doing it for the first time. Ask us for a consultation and we’ll happily look over whatever plans or sketches you have. We can suggest cost-effective solutions or point out problems early.
When extending your home, you should expect a timeline of at least 16 to 18 weeks from start to finish. If your project is more complex, such as if you are building a second storey, this will take additional time. You can check out our article for more information on how long it takes for an extension to be built.
All homes are different and every extension is unique. But materials and labour costs are surprisingly stable – and we can predict a rough budget even with basic details. See our article ‘How does an extension cost?‘ to get an immediate idea.
The number one concern from customers is that the cost will increase once underway. That doesn’t happen with us. Our contract is approved by the Federation of Master Builders and we project manage carefully to keep the everything on time and to budget.
If you’re dreaming of building an extension onto your home, we recommend first engaging with an architect who will be able to help you explore your options and advise if planning permission will be needed. You will then need to appoint a structural engineer to design the floor and roof structures, as well as provide calculations for supporting beams. View our top tips for planning your extension here.

Whether you will need planning permission for your home extension will depend on the height, length, materials and site restrictions. We can help you to understand what planning permission you might need once we get an understanding of your requirements. You might find it useful to see our article on planning your extension.

Absolutely. A major change to your home can be a daunting prospect if you’re doing it for the first time. Ask us for a consultation and we’ll happily look over whatever plans or sketches you have. We can suggest cost-effective solutions or point out problems early.

When extending your home, you should expect a timeline of at least 16 to 18 weeks from start to finish. If your project is more complex, such as if you are building a second storey, this will take additional time. You can check out our article for more information on how long it takes for an extension to be built.

All homes are different and every extension is unique. But materials and labour costs are surprisingly stable – and we can predict a rough budget even with basic details. See our article ‘How does an extension cost?‘ to get an immediate idea.
The number one concern from customers is that the cost will increase once underway. That doesn’t happen with us. Our contract is approved by the Federation of Master Builders and we project manage carefully to keep the everything on time and to budget.

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