By Edward Ellis, AssocRICS, MRPSA – Director, HMSA Property Services Limited
Victorian houses converted into flats are a familiar feature of London's residential property market, particularly in areas such as Hampstead, West Hampstead, Kilburn, Maida Vale and St John's Wood.
They can offer generous room proportions, high ceilings and period character that are difficult to replicate in modern developments.
However, buying a flat within an older converted building presents considerations that are not always apparent during a viewing.
A recently refurbished flat might look immaculate internally, but the condition of the roof, external walls, drainage and shared areas can be just as important as the accommodation itself.
Having inspected numerous period conversions across London, I find that understanding the condition of the entire building, rather than concentrating solely on the flat being purchased, is essential.
1. The roof and upper parts of the building
Many Victorian properties were originally constructed with pitched slate roofs, often incorporating chimney stacks, parapet walls, lead flashings and valley gutters.
Over time, these elements may deteriorate, allowing water penetration into the building.
Slipped or damaged slates, defective flashings and deteriorating chimney masonry can all contribute to leaks, some of which may not become apparent internally until significant damage has occurred.
Parapet gutters and concealed drainage arrangements can be particularly vulnerable where regular maintenance has been neglected.
These matters are relevant even when purchasing a ground-floor flat.
A purchaser may have no direct access to the roof, but depending on the terms of the lease, may still be required to contribute towards substantial repair or replacement expenditure.
During a survey, the roof and upper elevations should be assessed as far as reasonably practicable, with any limitations clearly explained. At HMSA, I may also use drone equipment to obtain improved views of high-level elements where weather conditions, safety and the circumstances of the inspection permit.
2. Dampness: understanding the cause rather than just the symptoms
Dampness is a common concern in older London properties, particularly within lower-ground and ground-floor flats.
However, a damp reading or an area of staining does not, in isolation, establish the cause of the problem.
Moisture can arise from several sources, including defective rainwater goods, leaking plumbing, inadequate external drainage, condensation, poor ventilation or water penetration through the building fabric.
Older buildings may also have been subjected to previous damp-proofing treatments, some of which may have addressed the symptoms rather than the underlying cause.
For example, cement-rich render or pointing applied to traditional masonry can sometimes impede evaporation and contribute to moisture-related deterioration.
The important question is not simply whether dampness is present, but why it is occurring and what measures are appropriate.
Where the cause remains uncertain, further targeted investigation may be necessary before committing to expensive remedial work.
3. Structural alterations and the original construction
Victorian houses were generally not designed to accommodate multiple self-contained flats.
Their conversion may have involved removing internal walls, forming new openings, installing additional bathrooms, altering staircases or adapting roof spaces.
Some conversions have been undertaken carefully and with appropriate approvals. Others may have limited supporting documentation or a history of subsequent alterations.
During a survey, particular attention should be paid to visible signs of structural movement, significant cracking, uneven floors and alterations that may have affected the original load-bearing arrangement.
It is worth remembering that older buildings commonly exhibit some unevenness and historic movement.
Not every sloping floor or crack indicates a serious structural defect.
The surveyor's role is to assess the visible evidence, consider its significance and recommend further investigation where there is a reasonable concern.
Your solicitor should separately establish whether relevant planning permissions, Building Regulations approvals and landlord consents were obtained for alterations, where required.
4. Windows, external walls and maintenance
Period conversions often retain original brickwork, decorative masonry and timber window openings, although the windows themselves may have been replaced.
Over time, weathering, inappropriate repairs and a lack of maintenance can affect these elements.
Common issues include deteriorating pointing, defective window seals, decaying timber components and cracks around openings.
Repairs to older buildings should also be considered in the context of their original construction. Modern materials and repair techniques are not necessarily appropriate for every traditional building.
Where the property is within a conservation area, additional restrictions may apply to external alterations, including replacement windows.
Your solicitor should investigate the relevant permissions and any leasehold consent requirements, particularly where works have already been carried out.
5. Fire safety and the conversion of the building
Fire safety is another important consideration when purchasing a converted flat.
The original house may predate modern fire safety standards by well over a century, and its subsequent conversion may have introduced additional risks if appropriate precautions were not incorporated or maintained.
Particular attention should be given to the flat entrance door, communal escape routes and any visible concerns associated with fire separation between flats.
However, a conventional RICS Home Survey is not a specialist fire risk assessment and cannot establish the performance of concealed fire-resisting construction.
The solicitor should establish the fire safety information available for the building, including the relevant fire risk assessment where applicable, and seek clarification of any outstanding recommendations.
This is particularly important where the common areas are managed informally or where responsibility for maintaining the building is unclear.
6. Who pays for repairs to the building?
One of the most frequently overlooked aspects of purchasing a converted flat is the distinction between ownership of the flat and responsibility for the wider building.
The roof, external walls, foundations, communal areas and drainage may be maintained collectively, although the precise obligations depend on the terms of the lease.
For example, a survey might identify that the roof is approaching the end of its serviceable life.
The physical condition of the roof is a surveying matter. Establishing who is responsible for arranging and funding its replacement is primarily a legal matter.
Before exchange of contracts, your solicitor should investigate the lease provisions, service charge arrangements, reserve funds and any planned or anticipated major works.
A relatively modest annual service charge does not necessarily mean that a building is well maintained. It may simply indicate that insufficient money is being collected for future expenditure.
Equally, a share of freehold does not automatically remove the financial obligations associated with maintaining the building.
7. Choosing the right level of survey
Not every Victorian converted flat automatically requires a Level 3 survey.
The appropriate level depends on the building's construction, condition, alterations and complexity, as well as the particular concerns of the purchaser.
A RICS Level 2 survey may be sufficient in some circumstances.
However, where there are substantial alterations, visible deterioration, complicated roof arrangements or a history of structural and damp-related problems, a Level 3 Building Survey may be more appropriate.
A Level 3 survey provides a more detailed assessment of defects, their likely causes, implications and recommended action.
It remains principally a visual, non-destructive inspection, and access to parts of a converted building may be restricted. Those limitations should be explained so the purchaser understands which areas have and have not been assessed.
Looking beyond the front door
When buying a Victorian converted flat, it is easy to focus on the internal layout, finishes and overall presentation.
In my experience, some of the more significant issues can lie elsewhere in the building.
A sound understanding of the condition of the roof, external walls, structure and communal elements, together with the associated leasehold obligations, can help purchasers make a more informed decision.
A survey cannot eliminate every uncertainty associated with an older property, but it should identify significant visible concerns, explain their implications and provide practical advice about what needs to happen next.
Buying a period conversion in London?
At HMSA Property Services, I undertake RICS Level 2 and Level 3 Home Surveys across London and the surrounding Home Counties, with extensive experience of Victorian and Edwardian houses, converted flats and maisonettes.
If you are purchasing a period conversion and are unsure which survey would be most appropriate, please get in touch with the property address and a link to the estate agent's particulars.
I would be pleased to review the available information and advise on the appropriate level of survey.
Edward Ellis, AssocRICS, MRPSA
RICS Registered Valuer | Director
HMSA Property Services Limited – Regulated by RICS
Email: info@hmsapropertyservices.com
Website: www.hmsapropertyservices.com