Refurbish or build new? Why the right question for existing buildings is usually a different one
“Demolition or refurbishment?” sounds like a clear-cut decision. In practice, however, the question is almost always framed too crudely when it comes to existing buildings. Often the best solution lies not at either extreme but in between: retaining, converting and extending, guided by a strategy. Anyone who owns, inherits or buys an existing building in Wiesbaden or the Rhine-Main region faces exactly this trade-off. And experience shows that the decision between refurbishment and new build is rarely made at the start, but only after a sound analysis.
As an architecture practice specialising in building in existing structures, fbnSTUDIO guides clients in Wiesbaden and the surrounding area through this decision-making process. The first step is always the same: do not begin with a list of measures, but with an understanding of the building and its possibilities.
Why is the question “refurbish or build new” usually too simple?
The question suggests two clear options: keep everything or replace everything. In reality, neither applies to most existing buildings. Many buildings have a sound basic structure but outdated building services. Others have a problematic extension from the 1970s but a high-quality old-building core. Still others are structurally sound but no longer suit their current or planned use.
In all these cases, the binary question is misleading. The better guiding question is: how much really has to be new, and what can sensibly be retained, adapted or extended? This more differentiated view opens up solutions that remain invisible in a pure cost comparison of refurbishment and new build.
Which intermediate solutions exist between refurbishment and new build?
Existing buildings rarely mean “keep everything” or “replace everything”. In practice, hybrid approaches often prove their worth, intervening specifically where necessary and retaining where sensible:
- Conversion with targeted interventions: changes to the floor plan, new openings, altered circulation while retaining the load-bearing structure
- Removal of poor extensions and strengthening of the core fabric: taking out inferior additions and exposing the original quality
- Extension instead of complete demolition: an extension, an added storey or an additional building that sensibly enlarges the existing building
- Adaptation of use: changing zones, routes and room layouts for contemporary everyday practicality
These intermediate solutions are generally less expensive than a complete new build, but they require more careful planning. They presuppose a precise understanding of the existing construction, which is exactly what a thorough analysis of the existing building in service phase 1 (LPH 1) of the German fee scale for architects (HOAI) provides.
Does a new build automatically have the better overall balance?
New builds can be very energy-efficient. At the same time, demolition, disposal and the construction of new load-bearing structures consume considerable resources. The so-called “embodied energy”, that is, the energy already stored in the existing building materials, is lost completely on demolition. Studies show that refurbishing an existing building can save up to a third of the CO2 emissions compared with demolition and new construction.
For the decision, therefore, the overall picture counts: feasibility, the approval situation, timeframe, costs and the value of the existing fabric. A new build makes sense if the building fabric is so badly damaged that refurbishment would be uneconomical, or if the existing structure fundamentally does not allow the planned use. In many other cases, a considered approach to the existing building offers the better overall balance.
How can I tell whether my building is suitable for refurbishment?
Assessing whether a building can be refurbished requires a systematic review on three levels. First, the question of whether it is worth preserving: what is the condition of the fabric? What spatial qualities does the building offer? What is the location like, and what is the starting position under building law? For listed buildings, the scope of protection comes in as a further factor.
Second, the question of adaptability: can the floor plan be adapted to the desired use? Can the building services be renewed? Is an energy-efficient improvement possible in sensible places without endangering the fabric? Third, the question of what cannot be saved: is there massive damage to the load-bearing structure? Are problematic building materials such as asbestos present? Is refurbishment clearly uneconomical?
These three levels can only be answered by a professional assessment on site. An experienced architect can not only evaluate the condition but also recognise potential that laypeople, and even some surveyors, overlook.
What does a refurbishment cost compared with a new build?
Flat-rate cost comparisons between refurbishment and new build should be treated with caution, as they depend heavily on the condition of the individual building. As a rough guide: the costs of a comprehensive refurbishment typically lie between 1,000 and 1,500 euros per square metre, and a complete refurbishment can exceed this. Depending on specification and region, new builds come to 2,500 to 3,500 euros per square metre, plus land costs and site access and utility connections.
What matters, however, is not the square-metre price alone but the overall calculation: with a new build, there are demolition costs, disposal, ancillary land costs and a completely new set of site access and utility connections. With a refurbishment, the existing infrastructure and the existing structure are already in place. At the same time, refurbishment carries the risk of unforeseen costs if the condition of the building has not been thoroughly investigated beforehand. That is precisely why an analysis of the existing building before planning begins is so important.
Why do the best decisions come from a comparison of options?
Instead of gut feeling, it helps to have one to three fully worked-out options with concrete figures for cost range, timeframe, depth of intervention, risks and approval pathway. A comparison of options makes the consequences of the different routes visible and enables a well-founded decision based on facts rather than assumptions.
A typical comparison of options for an existing building in Wiesbaden might look like this: Option A describes a careful refurbishment with minimal interventions and a moderate budget. Option B shows a comprehensive conversion with changes to the floor plan, new building services and energy upgrading. Option C presents partial demolition with an extension building, or the complete new build. Each option is set out with its specific advantages and disadvantages, costs and risks, so that the client can make an informed decision.
What role does heritage protection play in the decision?
With listed buildings, demolition is generally not an option. Heritage protection requires the preservation of the fabric worthy of protection. That does not mean, however, that no changes are possible. On the contrary: with the right concept, many listed buildings can be converted and used in a contemporary way, provided the planning takes the scope of protection into account and coordination with the heritage authority takes place early.
Retention can also make sense for buildings that are not listed, for example because the building fabric is good, because the location would not allow a building permit for a new build, or because the existing building structure offers qualities that cannot be reproduced in a new build. You will find more on heritage protection in our articles on energy-efficient refurbishment of listed buildings and on working with the heritage authority.
When does a new build really pay off?
A new build is the right decision if certain conditions are met. The building fabric is so badly damaged that repairing it would not be economically justifiable. The existing building structure fundamentally does not allow the desired use and cannot sensibly be adapted even by conversion. There is significant contamination with hazardous substances whose remediation would be disproportionately expensive. Or the building-law situation allows a new build with a much better use of the plot.
In these cases, the new build is not only the more economical but also the more sustainable solution. What matters is that this assessment is based on a sound analysis and not on a superficial impression. A building that looks dilapidated at first glance may well be capable of refurbishment structurally, and vice versa.
Refurbish or build new in Wiesbaden: special features of the regional market
In Wiesbaden and the Rhine-Main region, clients face a particular starting situation. The building stock is characterised by residential buildings from the Wilhelminian era (Gründerzeit), post-war buildings and buildings of the 1960s and 1970s. Many of these buildings are listed or form part of a protected ensemble. At the same time, building plots in good locations are rare and expensive, which makes retaining existing buildings even more attractive.
In addition, the approval situation for new builds in inner-city locations is often restrictive, whereas conversion and refurbishment measures on existing buildings can frequently be approved more easily. For clients, this means that the choice between refurbishment and new build in Wiesbaden is not only a technical question but also one of building law and economics, and one that requires local expertise.
An options check for your existing building
If you want to convert, refurbish or change the use of a building in Wiesbaden or the Rhine-Main region, do not begin with the decision “refurbish or build new”, but with a sound analysis. A comparison of options shows which mix of retention and renewal makes the most sense for your building. The right answer almost always lies in the details, not in blanket recommendations.
Book an initial consultation with fbnSTUDIO. We will analyse your existing building, develop options and show you which path is the right one for your project.
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