Do I Need an Award for Converting a Terraced, Semi-Detached, or Flat Property?

Converting a property can add value, increase living space, or create rental opportunities. But before starting a conversion project on a terraced house, semi-detached home, or flat, many homeowners wonder if they need an award or formal approval. Understanding when permissions are required can save time, money, and legal headaches. This post breaks down the key considerations for property conversions and explains when you might need an award or official consent.

Terraced house renovation in progress

What Is an Award in Property Conversion?

An award typically refers to a formal approval or license granted by a local authority or governing body. This can include:

• Planning permission: Approval to change the use or structure of a building.

• Building regulations approval: Confirmation that the work meets safety and construction standards.

• Listed building consent: Required if the property is historically protected.

• Party Wall Award: A legal agreement between neighbors when work affects shared walls or boundaries.

  
  

Knowing which award applies depends on the type of conversion and the property’s location.

Converting a Terraced Property

Terraced houses share walls with neighbors on both sides, which means conversions often affect adjoining properties. Common conversions include loft conversions, basement conversions, or splitting a terraced house into flats.

When You Need an Award for Terraced Conversions

• Planning permission is usually required if the conversion changes the building’s use (for example, turning a single house into multiple flats).

• Building regulations approval is mandatory for structural changes, such as adding new floors or altering walls.

• Party Wall Award is often necessary because work may impact shared walls or foundations. This award protects both parties and ensures proper communication.

• If the terraced house is a listed building, you must get listed building consent before any work.

  
  

Example

A homeowner converting their terraced house into two flats will need planning permission and building regulations approval. They will also need a Party Wall Award if the work affects shared walls with neighbors.

Converting a Semi-Detached Property

Semi-detached homes share one wall with a neighbor. Conversions here might include loft conversions, garage conversions, or creating separate living units.

When You Need an Award for Semi-Detached Conversions

• Planning permission is required if the conversion changes the use or significantly alters the building’s footprint.

• Building regulations approval applies to all structural and safety-related work.

• Party Wall Award is necessary if the work affects the shared wall or boundary.

• Listed building consent applies if the property is protected.

  
  

Example

If you convert a garage attached to a semi-detached house into a living space, you will need building regulations approval. If the garage shares a wall with the neighbor, a Party Wall Award is also needed.

Converting a Flat

Flats are often part of larger buildings with multiple owners. Conversion projects here might involve internal alterations or combining flats.

When You Need an Award for Flat Conversions

• Planning permission depends on the scale of the conversion and whether it changes the flat’s use.

• Building regulations approval is required for structural changes, fire safety, ventilation, and insulation.

• Party Wall Award may be needed if work affects shared walls or floors.

• You may also need freeholder or management company consent since flats are often leasehold.

  
  

Example

Converting two adjacent flats into one larger flat requires planning permission and building regulations approval. Consent from the freeholder or management company is also essential.

Key Differences Between Terraced, Semi-Detached, and Flat Conversions

| Aspect | Terraced Property | Semi-Detached Property | Flat Conversion |

|-------------------------|--------------------------------------|------------------------------------|------------------------------------|

| Shared walls | Two neighbors | One neighbor | Multiple neighbors |

| Party Wall Award needed | Usually yes | Usually yes | Sometimes, depending on work |

| Planning permission | Often required for use changes | Often required for use changes | Depends on scale and use changes |

| Building regulations | Always required for structural work | Always required for structural work | Always required for structural work |

| Additional consents | Listed building consent if applicable | Listed building consent if applicable | Freeholder/management consent often needed |

Practical Tips Before Starting a Conversion

• Check local planning rules: Local councils have specific rules that vary by area.

• Consult a professional: Architects or surveyors can advise on necessary awards and approvals.

• Talk to neighbors early: Especially important for terraced and semi-detached properties.

• Get written agreements: For Party Wall Awards and freeholder consents.

• Plan for inspections: Building control will inspect the work to ensure compliance.