A few things that increase cost:
Each building site is unique and while every project is different in some way or another, there are common culprits that could impact your project’s budget.
Sometimes, sloping sites impact foundation design. A taller foundation wall is required to retain soil. Soil removal and site re-grading may also be needed to move material around the site. This is especially important for surface water management.
Cost: Varies depending on specific site conditions.
Difficult Soil Conditions
We often use helical screw piles to support our grade beams, posts and decks. If soils are determined to be marginal or fail to support our foundation systems, additional measures may need to be taken to meet engineering. On occasion, this triggers a different foundation system.
Cost: Varies depending on specific site conditions.
Existing infrastructure and new services don’t always play nice. Clay or paper sewer lines and lead water lines are not compatible with the new technology we use. It is commonplace to replace these lines on our projects. Access and allowable site disruption can influence cost.
Cost: Typically adds $5,000 – $8,000.
Separate Utility Metering
In some circumstances, homeowners ask for separate meters for water, gas and electricity. Separate metering can be set up at the new building. Upside is that it keeps it easy to separate costs between dwellings. Downside is there are monthly fees for an extra meter.
Cost: Could add $50 / mo. per meter + installation fees.
Demolition & Tree Removal
Demolishing old buildings is often part of residential construction. Depending on the age of the building there could be toxic substances present. Abatement may be necessary. With disruption to the building site, sadly, sometimes overgrown trees need to be removed too.
Cost: Typically $3,000 – $4,000 to demolish a double garage.
We sometimes need to re-route gas lines at the beginning of a project. Ideally, they’re tucked to the edge of the building site or along the lot line. This allows us to site the building in the desired location, makes for safe excavation and efficient foundation installation.
Cost: Typically $4,000 – $6,000 relocate.