ESP INSIGHT 05
An existing building may have served its purpose for decades. But even a small addition can change the requirements that apply to it, and the financial consequences may extend far beyond the new construction.
The Building Was Fine Yesterday. What Changed?
Imagine owning a building that has operated successfully for twenty years.
The front contains offices. The back contains warehouse space. Employees work, inventory is stored, deliveries arrive, and the business operates as intended.
Business is growing.
The owner wants to add 600 square feet of warehouse space.
The property appears to have room for the addition. The existing building has been operating for years without significant problems. And 600 square feet doesn't seem like a particularly complicated project.
The owner begins estimating construction costs, considering financing, and imagining how the additional space will improve operations.
After all, the offices aren't changing.
The existing warehouse isn't being renovated.
We're simply adding 600 square feet.
So why would the rest of the building matter?
Because the building didn't necessarily become unsafe or noncompliant overnight. The owner changed what they wanted the building to do, and that decision changed which requirements needed to be evaluated.
And those requirements can have expensive consequences.
Just Because It Complied Before Doesn't Mean the Expansion Will
Buildings are generally designed and constructed under the codes applicable at the time of their original construction.
As building codes evolve, many legally established existing conditions are permitted to remain, even when those conditions would not necessarily meet the requirements for new construction today.
That doesn't automatically mean the existing building is unsafe.
And it doesn't mean every building must be completely modernized whenever an owner proposes an addition.
However, additions, alterations, and changes in occupancy or use can introduce new requirements.
Depending on the adopted building code, the proposed work, and the existing building's characteristics, those requirements may affect areas beyond the addition itself.
Consider our office and warehouse example.
The original building may have been designed within the allowable building area established by its construction type, occupancy classifications, and fire-protection provisions.
Adding another 600 square feet changes the building's total area.
That change may require reevaluating the allowable area, fire protection, occupancy arrangement, and other applicable requirements.
The original building may have been entirely appropriate for its approved use and size.
But that doesn't automatically mean the expanded building satisfies the requirements that apply today.
The building didn't necessarily change because the code changed. The owner's proposed expansion changed what needed to be evaluated.
Two Uses. One Building. Different Requirements.
Our example contains two different functions: office space and warehouse space.
To the owner, it's one business operating in one building.
But under the building code, those spaces may represent different occupancy classifications.
Office space is commonly classified as Business occupancy, while warehouse space may be classified as Storage occupancy, depending on the materials stored and how the space operates.
Buildings containing multiple occupancies can be evaluated using different code approaches, including separated, nonseparated, or accessory occupancy provisions, where applicable.
These distinctions can affect allowable building area, fire-resistance requirements, fire protection, and other aspects of the design.
The original building may have been approved based on a particular arrangement of occupancies, building size, and construction characteristics.
When additional warehouse space is introduced, the assumptions and calculations supporting that arrangement may need to be reconsidered.
Even though the owner isn't planning to touch the offices, the offices may still be part of the overall building code evaluation.
The addition doesn't exist independently of the building simply because it's located on the other side of a wall.
And that is where a seemingly small project can become considerably more complicated.
When 600 Square Feet Affects 6,000
Let's take the example a little further.
Imagine the existing building contains 6,000 square feet of office and warehouse space.
The owner wants to add another 600 square feet.
That's a 10% increase in building area.
It might seem reasonable to assume the construction budget should reflect only the additional 10%.
But what happens if the expanded building exceeds an applicable fire-protection threshold?
Depending on the adopted code, occupancy classifications, building configuration, and other applicable provisions, the expansion could trigger requirements for automatic sprinkler protection beyond the addition itself.
Now the owner may need to investigate sprinkler installation in the existing building.
That could introduce additional questions.
Can the existing water service support the required system?
Will a new water connection be necessary?
Is there adequate space for equipment?
Will existing ceilings or other building elements need to be modified?
How will those changes affect business operations during construction?
Suddenly, the owner isn't simply paying for 600 square feet of new warehouse.
The project may involve improvements affecting thousands of square feet of existing building.
And fire protection is only one possible example.
An addition may also introduce concerns involving accessibility, means of egress, structural connections, mechanical capacity, electrical infrastructure, zoning, parking, or site development.
Not every expansion triggers these requirements. Some projects remain relatively straightforward.
But the cost of an addition isn't always determined by the size of the addition.
Sometimes the existing building determines the larger portion of the investment.
The Most Expensive Assumption Is That Nothing Else Changes
It's understandable that owners focus on the space they want to add.
They know what they need.
More storage.
Another office.
Additional treatment rooms.
More production capacity.
And because the existing building has been functioning for years, they may assume the remaining portions of the building have little relevance to the proposed work.
But buildings are interconnected systems.
The structure supports the building as a whole.
Mechanical and electrical infrastructure serve multiple spaces.
Fire protection and means of egress may be evaluated across occupancy areas or the entire building.
Zoning and site requirements often consider the complete property.
A decision affecting one portion of the building can create consequences elsewhere.
That doesn't mean the addition is a bad idea.
It means the owner needs to understand the consequences before deciding how to proceed.
The expensive mistake isn't necessarily choosing to expand. It's committing to an expansion without reasonably investigating what that decision may require.
And this is where the process should begin to look different.
First, Understand What You're Actually Trying to Accomplish
Before investigating how to expand a building, there's a more fundamental question.
Why does the owner need the additional space?
Consider the warehouse example.
The owner believes another 600 square feet will solve an operational problem.
But what problem?
Is inventory increasing?
Are deliveries creating congestion?
Is storage poorly organized?
Does the business need additional equipment?
Are employees losing time because materials are located too far from where they're needed?
And perhaps most importantly:
Is additional square footage actually the best solution?
An addition might be appropriate.
But reorganizing the existing space, changing operational procedures, improving storage systems, or relocating certain functions might accomplish the same objective with less investment.
Those possibilities deserve consideration before assuming construction is the answer.
The ESP Strategy Session: Understanding the Purpose Before Designing the Solution
This is why ESP Architects begins with a Strategy Session.
The two-hour, in-person session is designed to uncover the owner's objectives, needs, wants, priorities, assumptions, and expectations.
For a $1,000 investment, we begin examining what the project is supposed to accomplish and which decisions matter most.
What does the owner actually need?
What would success look like?
Which requirements are essential, and which are preferences?
What operational problems are we trying to solve?
What investment is the owner prepared to make?
What assumptions are driving the proposed solution?
And what questions haven't been asked yet?
The Strategy Session isn't intended to resolve every technical issue or establish that an existing building is suitable for expansion.
Its purpose is to establish a clearer understanding of the project before committing to design.
Before we determine whether the building can accommodate an addition, we should understand whether the addition is actually what the owner needs.
Sometimes that conversation confirms the original direction.
Sometimes it reveals a better question.
And sometimes it changes the direction of the project entirely.
Next, Investigate What the Existing Building Can Support
Once the objectives are better understood, the next question becomes more technical.
Can the existing building and property support what the owner wants to accomplish?
And if so, what might be required?
This is where an architectural feasibility study becomes valuable.
The Architectural Feasibility Study: Investigating the Possibilities and Constraints
Unlike the Strategy Session, which focuses on purpose and decision-making, a feasibility study investigates the conditions that may influence whether the project can move forward.
For an existing building expansion, that investigation may include:
Existing building documentation. Reviewing available drawings, permits, and building records to better understand what was originally constructed and approved.
Existing conditions. Evaluating accessible portions of the building and identifying conditions that may require additional verification.
Building code considerations. Reviewing occupancy classifications, construction type, allowable area, fire protection, accessibility, and other provisions relevant to the proposed work.
Zoning and site limitations. Investigating setbacks, lot coverage, parking, site access, and other applicable land-use requirements.
Building systems. Identifying potential concerns involving structure, mechanical equipment, electrical service, plumbing, utilities, and other infrastructure.
Potential conflicts. Exploring where the proposed addition may introduce requirements or limitations affecting the existing building.
Possible alternatives. Considering whether different approaches could accomplish the owner's objectives with fewer complications or a more appropriate investment.
The scope of the feasibility study should reflect the project's specific concerns.
Some questions may be answered through available records and preliminary analysis.
Others may require field measurements, additional investigation, consultants, engineering calculations, or discussions with the authority having jurisdiction.
And some conditions may remain uncertain until portions of the building are opened or more detailed design work is performed.
A feasibility study isn't a guarantee that every problem has been discovered.
It's an opportunity to investigate the significant questions while the owner still has the flexibility to make different decisions.
That flexibility has value.
The Difference Between Discovering a Problem Early and Discovering It Late
Return to our 600-square-foot warehouse addition.
Imagine the owner proceeds directly into design based on the assumption that the project is relatively simple.
Drawings are developed.
Engineering begins.
Construction costs are estimated.
The owner makes financial commitments.
Then, during permitting, a requirement is identified that substantially changes the project.
Perhaps additional fire protection is required.
Perhaps an existing system needs significant modification.
Perhaps the proposed addition creates an allowable-area issue that requires a different approach.
Now the owner may face redesign, additional consultant fees, schedule delays, and a construction budget that no longer reflects the original expectations.
The requirement itself may have existed regardless of when it was discovered.
But discovering it late can make the consequences more expensive.
Now consider a different approach.
The owner first establishes the project's objectives through a Strategy Session.
Then a feasibility study investigates the building's relevant conditions and identifies the potential code and infrastructure conflicts.
A significant issue is discovered before the owner commits to full design.
At that point, the owner may have several choices.
Proceed with the addition and account for the additional requirements.
Modify the scope.
Consider a different building configuration.
Investigate operational alternatives that reduce the need for new space.
Or decide that the investment no longer makes sense.
The technical requirement may be the same.
The difference is that the owner discovered it while there were still choices available.
And having choices is valuable.
A Small Investment in Understanding Before a Much Larger Investment in Construction
Owners often hesitate to spend money investigating a project before they know whether they want to proceed.
That's understandable.
Nobody wants to spend money unnecessarily.
But consider the alternative.
If an owner is contemplating a $250,000, $500,000, or even larger construction investment, how much financial exposure are they accepting when they proceed without understanding the existing building?
A $1,000 Strategy Session helps establish what the project needs to accomplish.
An appropriately scoped feasibility study can then investigate the building, identify potential conflicts, and explore available options.
These are separate services with different purposes.
Neither eliminates every risk.
Neither guarantees that the project will be approved or that construction costs will remain unchanged.
But together, they provide a more informed foundation for deciding what to do next.
The purpose isn't to spend more money before construction. It's to make better decisions about the money you're already considering spending.
Sometimes that process confirms the original plan.
Sometimes it reveals a better approach.
And sometimes the most valuable result is discovering that the proposed investment should not move forward.
A project doesn't have to be built for the investigation to have been worthwhile.
Before You Change the Building, Understand What You're Changing
The office and warehouse building in our example didn't necessarily become unsafe overnight.
It may have operated successfully for decades under its legally established conditions.
But the proposed expansion introduced new questions.
Questions about the building's size.
Its occupancy classifications.
Its construction.
Its systems.
Its applicable code requirements.
And ultimately, whether the investment still made sense.
The owner didn't necessarily make a mistake by wanting more space.
The mistake would be assuming that the new space could be evaluated without understanding the building that already exists.
Every decision either creates or destroys value.
Before making a decision to expand, renovate, or change an existing building, understand what you're trying to accomplish and what the existing building may require.
Because sometimes the most expensive part of a small addition is everything you didn't know you needed to consider.
Considering an Addition or Renovation?
ESP Architects begins by understanding the purpose behind your project through the ESP Strategy Session.
When appropriate, an architectural feasibility study provides the next level of investigation into the existing building, potential conflicts, and available options.
Before committing to design and construction, let's establish what needs to be understood.
Start with a Project Fit Conversation.
ESP Architects
Strategy First. Design Second. Success Always.