Common Mistakes Owners Make During Major Renovations

Major renovations can transform how a property looks, functions, and performs. They can also expose owners to significant cost, schedule, and coordination risk.

The most damaging problems do not always begin with poor workmanship. Many begin earlier, when the project is being defined, designed, priced, or organized. An incomplete scope, unrealistic budget, rushed procurement process, or unclear decision structure can follow the project into construction and become increasingly expensive to correct.

Understanding the most common owner-side mistakes can help create a more controlled path from planning through closeout.

Beginning without a sufficiently defined scope

Owners may feel pressure to start design or construction quickly, particularly when they have a target move-in date, lease milestone, or personal deadline. Speed can be valuable, but beginning before the scope is adequately defined often creates false progress.

The project should have a clear statement of priorities, functional requirements, quality expectations, infrastructure needs, and known constraints. Items that remain undecided should be identified along with the date each decision is required.

Without that foundation, the design team may proceed based on assumptions. Contractors may price different interpretations of the project, and important work may not appear in the budget until construction is underway.

Treating the contractor's price as the total project budget

The construction contract is usually the largest project cost, but it is rarely the only one. A complete owner budget may also include:

• Architectural and engineering fees

• Interior design and specialty consultants

• Surveys, testing, and investigative work

• Permits and agency fees

• Insurance and legal expenses

• Technology, security, audiovisual, and specialty systems

• Furniture, fixtures, equipment, and owner-purchased materials

• Temporary protection, relocation, storage, or operating costs

• Utility or building-management charges

• Contingency

Owners should understand which costs are inside the contractor's proposal, which are carried elsewhere, and which have not yet been priced. Otherwise, a project can appear to be on budget while the owner's total financial exposure continues to increase.

Establishing an unrealistic schedule

A desired completion date is not the same as a reliable construction schedule. Major renovations depend on design progress, approvals, procurement, site access, existing conditions, trade sequencing, inspections, testing, and timely owner decisions.

Schedules should identify major milestones, long-lead items, required approvals, decision deadlines, and the assumptions supporting the completion date. Time should also be included for punch-list work and closeout.

An aggressive schedule may be achievable, but the team should understand what it requires. That could include early material releases, phased design packages, premium costs, additional staffing, or decisions made with less flexibility.

Selecting a contractor based primarily on price

The lowest proposal is not always the lowest final cost. Contractors may carry different scope assumptions, staffing plans, allowances, exclusions, schedules, and levels of detail.

A meaningful comparison should consider:

• Relevant project experience

• Proposed project team

• Scope coverage and exclusions

• Allowances and alternates

• General conditions and fees

• Schedule assumptions

• Approach to occupied or constrained work

• Communication and reporting systems

• References from comparable projects

Owners should understand why prices differ before choosing a contractor. A lower number may be competitive, or it may reflect missing scope that returns later as a change order.

Allowing design to advance without cost feedback

Design and budget should develop together. Waiting until the drawings are nearly complete to obtain meaningful cost feedback can leave the owner with limited options if the design exceeds the budget.

Periodic estimating during design allows the team to identify cost pressure while alternatives remain available. It also helps distinguish between required work, owner priorities, optional enhancements, and items that could be deferred.

Cost reviews should address the entire project rather than focusing only on visible finishes. Structural work, mechanical and electrical systems, existing-condition repairs, temporary work, and code requirements can consume a significant share of a renovation budget.

Making decisions too late

Owners should have adequate time to consider important choices, but delayed decisions can disrupt design, procurement, and construction.

A decision log should identify:

• The decision required

• Available options

• The responsible decision-maker

• Cost and schedule implications

• The last responsible decision date

• Final direction

The team should elevate decisions before they become urgent. When an owner is asked to decide immediately, it often means the issue was identified too late or was not tracked effectively.

Giving direction through multiple channels

Construction teams may receive input from the owner, family members, executives, property staff, designers, consultants, and building management. If several people can direct the contractor independently, the team may act on conflicting or incomplete instructions.

The project should establish who can authorize scope, cost, and schedule decisions. Important direction should be documented through a defined communication process rather than scattered across meetings, text messages, phone calls, and informal site conversations.

This does not mean every communication must be formal. It means the team needs a reliable record of decisions and a clear understanding of who has approval authority.

Approving changes without complete information

Change orders are common on major renovations, especially when existing conditions cannot be fully investigated before work begins. The problem is not simply that changes occur. The risk comes from approving them without understanding entitlement, scope, price, schedule impact, and alternatives.

A change-order proposal should explain:

• Why the change is required

• How it differs from the original contract

• What work is included and excluded

• How the price was calculated

• Whether credits apply

• What schedule activities are affected

• Whether other solutions were evaluated

Pending and potential changes should also be reflected in the cost forecast. Looking only at approved changes can understate the expected final cost.

Underestimating existing-condition risk

Renovations involve conditions that may be concealed behind walls, above ceilings, below floors, or within existing systems. Original drawings may be incomplete or inaccurate. Previous work may not have been documented or permitted properly.

Owners can reduce uncertainty through surveys, selective probes, testing, utility investigations, record searches, and early consultant review. These steps cannot reveal every condition, but they can improve the quality of the design, budget, and schedule assumptions.

The contingency should reflect the project's actual risk profile. An older building, waterfront property, occupied space, structural alteration, or major infrastructure upgrade may require more contingency than a straightforward cosmetic renovation.

Failing to plan for permits and outside approvals

Building permits may be only one part of the approval process. Depending on the property and scope, the project may also involve zoning, fire marshal, health, wetlands, coastal or floodplain, historic, utility, building-management, condominium or cooperative board, or other reviews.

The team should identify likely approvals, filing responsibilities, prerequisites, required inspections, and closeout documents early. Approval time should be incorporated into the project schedule rather than treated as an administrative task that will occur automatically.

Owners should also confirm who is responsible for preparing, filing, tracking, and closing each permit or approval.

Focusing on construction but not closeout

Substantial completion is not the same as complete project closeout. Owners should track remaining work and documentation before the project team leaves the site and final payments are released.

Closeout may include:

• Final inspections and permit sign-offs

• Punch-list completion

• Testing and commissioning

• Training for property or facilities staff

• Warranties and manuals

• Record drawings and approved plans

• Attic stock and spare materials

• Lien releases and final financial reconciliation

• Keys, access credentials, and system information

Incomplete closeout can create problems during operations, future renovations, insurance reviews, refinancing, or a property sale.

Managing the project without adequate owner-side capacity

Architects, engineers, contractors, and consultants each have important responsibilities, but none automatically assumes responsibility for every owner priority.

The owner still needs a reliable way to integrate scope, budget, schedule, procurement, decisions, risk, communication, and closeout. On a complex project, this can require more time and construction knowledge than the owner or internal staff can reasonably provide.

An owner's representative helps create that structure while keeping the owner informed at the level appropriate to the project. The objective is not to add another layer of administration. It is to provide clear accountability, independent visibility, and consistent follow-through across the project team.

Major renovations will always involve decisions and uncertainty. Owners are better positioned when the project begins with defined priorities, realistic expectations, disciplined controls, and a team organized around the owner's objectives.

Planning a major residential or commercial renovation? Contact Kestrel for senior-level owner-side planning, project management, and construction oversight.